stack_lvl+0xf4/0x15c [ 50.704024][ T4446] dump_stack+0x1c/0x5c [ 50.704772][ T4446] dump_header+0xc0/0x724 [ 50.705541][ T4446] out_of_memory+0xc78/0xf70 [ 50.706344][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 50.707364][ T4446] try_charge_memcg+0xa4c/0x1390 [ 50.708260][ T4446] charge_memcg+0xa4/0x1f0 [ 50.709053][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 50.710142][ T4446] __read_swap_cache_async+0x378/0x688 [ 50.711159][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 50.712180][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 50.713090][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 50.713982][ T4446] shmem_file_read_iter+0x210/0x954 [ 50.714885][ T4446] do_iter_read+0x4d4/0x8b4 [ 50.715659][ T4446] vfs_iter_read+0x88/0xac [ 50.716444][ T4446] loop_process_work+0xbf0/0x200c [ 50.717318][ T4446] loop_workfn+0x48/0x58 [ 50.718084][ T4446] process_one_work+0x7e4/0x13bc [ 50.718980][ T4446] worker_thread+0x8cc/0xfe8 [ 50.719808][ T4446] kthread+0x254/0x2e0 [ 50.720529][ T4446] ret_from_fork+0x10/0x20 [ 50.721749][ T4446] memory: usage 96kB, limit 96kB, failcnt 42234 [ 50.723191][ T4446] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 50.724547][ T4446] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 50.725652][ T4446] Memory cgroup stats for /syz0/test: [ 50.725733][ T4446] anon 0 [ 50.725733][ T4446] file 65536 [ 50.725733][ T4446] kernel 24576 [ 50.725733][ T4446] kernel_stack 0 [ 50.725733][ T4446] pagetables 0 [ 50.725733][ T4446] sec_pagetables 0 [ 50.725733][ T4446] percpu 0 [ 50.725733][ T4446] sock 0 [ 50.725733][ T4446] vmalloc 0 [ 50.725733][ T4446] shmem 53248 [ 50.725733][ T4446] zswap 0 [ 50.725733][ T4446] zswapped 0 [ 50.725733][ T4446] file_mapped 0 [ 50.725733][ T4446] file_dirty 0 [ 50.725733][ T4446] file_writeback 0 [ 50.725733][ T4446] swapcached 8171520 [ 50.725733][ T4446] anon_thp 0 [ 50.725733][ T4446] file_thp 0 [ 50.725733][ T4446] shmem_thp 0 [ 50.725733][ T4446] inactive_anon 24576 [ 50.725733][ T4446] active_anon 28672 [ 50.725733][ T4446] inactive_file 0 [ 50.725733][ T4446] active_file 20480 [ 50.725733][ T4446] unevictable 0 [ 50.725733][ T4446] slab_reclaimable 15520 [ 50.725733][ T4446] slab_unreclaimable 5192 [ 50.725733][ T4446] slab 20712 [ 50.741511][ T4446] Out of memory and no killable processes... [ 50.742570][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 50.742626][ C0] I/O error, dev loop0, sector 276 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 50.744593][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 50.747300][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 50.749038][ T1618] Workqueue: loop0 loop_rootcg_workfn [ 50.750029][ T1618] Call trace: [ 50.750631][ T1618] dump_backtrace+0x1c4/0x1f0 [ 50.751548][ T1618] show_stack+0x2c/0x3c [ 50.752300][ T1618] __dump_stack+0x30/0x40 [ 50.753041][ T1618] dump_stack_lvl+0xf4/0x15c [ 50.753863][ T1618] dump_stack+0x1c/0x5c [ 50.754608][ T1618] dump_header+0xc0/0x724 [ 50.755397][ T1618] out_of_memory+0xc78/0xf70 [ 50.756220][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 50.757203][ T1618] try_charge_memcg+0xa4c/0x1390 [ 50.758130][ T1618] charge_memcg+0xa4/0x1f0 [ 50.758883][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 50.759881][ T1618] __read_swap_cache_async+0x378/0x688 [ 50.760794][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 50.761689][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 50.762565][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 50.763468][ T1618] shmem_file_read_iter+0x210/0x954 [ 50.764396][ T1618] do_iter_read+0x4d4/0x8b4 [ 50.765206][ T1618] vfs_iter_read+0x88/0xac [ 50.765987][ T1618] loop_process_work+0xbf0/0x200c [ 50.766829][ T1618] loop_rootcg_workfn+0x28/0x38 [ 50.767693][ T1618] process_one_work+0x7e4/0x13bc [ 50.768598][ T1618] worker_thread+0x8cc/0xfe8 [ 50.769457][ T1618] kthread+0x254/0x2e0 [ 50.770208][ T1618] ret_from_fork+0x10/0x20 [ 50.773684][ T1618] memory: usage 96kB, limit 96kB, failcnt 42253 [ 50.774719][ T1618] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 50.775947][ T1618] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 50.777123][ T1618] Memory cgroup stats for /syz0/test: [ 50.777190][ T1618] anon 0 [ 50.777190][ T1618] file 65536 [ 50.777190][ T1618] kernel 24576 [ 50.777190][ T1618] kernel_stack 0 [ 50.777190][ T1618] pagetables 0 [ 50.777190][ T1618] sec_pagetables 0 [ 50.777190][ T1618] percpu 0 [ 50.777190][ T1618] sock 0 [ 50.777190][ T1618] vmalloc 0 [ 50.777190][ T1618] shmem 53248 [ 50.777190][ T1618] zswap 0 [ 50.777190][ T1618] zswapped 0 [ 50.777190][ T1618] file_mapped 0 [ 50.777190][ T1618] file_dirty 0 [ 50.777190][ T1618] file_writeback 0 [ 50.777190][ T1618] swapcached 8171520 [ 50.777190][ T1618] anon_thp 0 [ 50.777190][ T1618] file_thp 0 [ 50.777190][ T1618] shmem_thp 0 [ 50.777190][ T1618] inactive_anon 24576 [ 50.777190][ T1618] active_anon 28672 [ 50.777190][ T1618] inactive_file 0 [ 50.777190][ T1618] active_file 20480 [ 50.777190][ T1618] unevictable 0 [ 50.777190][ T1618] slab_reclaimable 15520 [ 50.777190][ T1618] slab_unreclaimable 5192 [ 50.777190][ T1618] slab 20712 [ 50.792001][ T1618] Out of memory and no killable processes... [ 50.792966][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 50.793006][ C1] I/O error, dev loop0, sector 3186 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 50.795144][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 50.796591][ C1] Buffer I/O error on dev loop0, logical block 1593, async page read [ 50.797724][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 50.800870][ T4446] Workqueue: loop0 loop_workfn [ 50.801717][ T4446] Call trace: [ 50.802291][ T4446] dump_backtrace+0x1c4/0x1f0 [ 50.803118][ T4446] show_stack+0x2c/0x3c [ 50.803847][ T4446] __dump_stack+0x30/0x40 [ 50.804626][ T4446] dump_stack_lvl+0xf4/0x15c [ 50.805452][ T4446] dump_stack+0x1c/0x5c [ 50.806199][ T4446] dump_header+0xc0/0x724 [ 50.807019][ T4446] out_of_memory+0xc78/0xf70 [ 50.807841][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 50.808863][ T4446] try_charge_memcg+0xa4c/0x1390 [ 50.809765][ T4446] charge_memcg+0xa4/0x1f0 [ 50.810542][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 50.811645][ T4446] __read_swap_cache_async+0x378/0x688 [ 50.812582][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 50.813523][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 50.814419][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 50.815314][ T4446] shmem_file_read_iter+0x210/0x954 [ 50.816264][ T4446] do_iter_read+0x4d4/0x8b4 [ 50.817000][ T4446] vfs_iter_read+0x88/0xac [ 50.817766][ T4446] loop_process_work+0xbf0/0x200c [ 50.818623][ T4446] loop_workfn+0x48/0x58 [ 50.819407][ T4446] process_one_work+0x7e4/0x13bc [ 50.820275][ T4446] worker_thread+0x8cc/0xfe8 [ 50.821085][ T4446] kthread+0x254/0x2e0 [ 50.821820][ T4446] ret_from_fork+0x10/0x20 [ 50.825290][ T4446] memory: usage 96kB, limit 96kB, failcnt 42272 [ 50.826291][ T4446] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 50.827499][ T4446] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 50.829057][ T4446] Memory cgroup stats for /syz0/test: [ 50.829109][ T4446] anon 0 [ 50.829109][ T4446] file 65536 [ 50.829109][ T4446] kernel 24576 [ 50.829109][ T4446] kernel_stack 0 [ 50.829109][ T4446] pagetables 0 [ 50.829109][ T4446] sec_pagetables 0 [ 50.829109][ T4446] percpu 0 [ 50.829109][ T4446] sock 0 [ 50.829109][ T4446] vmalloc 0 [ 50.829109][ T4446] shmem 53248 [ 50.829109][ T4446] zswap 0 [ 50.829109][ T4446] zswapped 0 [ 50.829109][ T4446] file_mapped 0 [ 50.829109][ T4446] file_dirty 0 [ 50.829109][ T4446] file_writeback 0 [ 50.829109][ T4446] swapcached 8171520 [ 50.829109][ T4446] anon_thp 0 [ 50.829109][ T4446] file_thp 0 [ 50.829109][ T4446] shmem_thp 0 [ 50.829109][ T4446] inactive_anon 24576 [ 50.829109][ T4446] active_anon 28672 [ 50.829109][ T4446] inactive_file 0 [ 50.829109][ T4446] active_file 20480 [ 50.829109][ T4446] unevictable 0 [ 50.829109][ T4446] slab_reclaimable 15520 [ 50.829109][ T4446] slab_unreclaimable 5192 [ 50.829109][ T4446] slab 20712 [ 50.845803][ T4446] Out of memory and no killable processes... [ 50.846760][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 50.846798][ C0] I/O error, dev loop0, sector 278 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 50.849127][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 50.851796][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 50.853383][ T1618] Workqueue: loop0 loop_rootcg_workfn [ 50.854221][ T1618] Call trace: [ 50.854810][ T1618] dump_backtrace+0x1c4/0x1f0 [ 50.855539][ T1618] show_stack+0x2c/0x3c [ 50.856191][ T1618] __dump_stack+0x30/0x40 [ 50.856890][ T1618] dump_stack_lvl+0xf4/0x15c [ 50.857623][ T1618] dump_stack+0x1c/0x5c [ 50.858315][ T1618] dump_header+0xc0/0x724 [ 50.859106][ T1618] out_of_memory+0xc78/0xf70 [ 50.859943][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 50.860955][ T1618] try_charge_memcg+0xa4c/0x1390 [ 50.861884][ T1618] charge_memcg+0xa4/0x1f0 [ 50.862760][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 50.863920][ T1618] __read_swap_cache_async+0x378/0x688 [ 50.864874][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 50.865801][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 50.866687][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 50.867630][ T1618] shmem_file_read_iter+0x210/0x954 [ 50.868569][ T1618] do_iter_read+0x4d4/0x8b4 [ 50.869338][ T1618] vfs_iter_read+0x88/0xac [ 50.870112][ T1618] loop_process_work+0xbf0/0x200c [ 50.870981][ T1618] loop_rootcg_workfn+0x28/0x38 [ 50.871831][ T1618] process_one_work+0x7e4/0x13bc [ 50.872747][ T1618] worker_thread+0x8cc/0xfe8 [ 50.873553][ T1618] kthread+0x254/0x2e0 [ 50.874248][ T1618] ret_from_fork+0x10/0x20 [ 50.876036][ T1618] memory: usage 96kB, limit 96kB, failcnt 42291 [ 50.877029][ T1618] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 50.879869][ T1618] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 50.881001][ T1618] Memory cgroup stats for /syz0/test: [ 50.881067][ T1618] anon 0 [ 50.881067][ T1618] file 65536 [ 50.881067][ T1618] kernel 24576 [ 50.881067][ T1618] kernel_stack 0 [ 50.881067][ T1618] pagetables 0 [ 50.881067][ T1618] sec_pagetables 0 [ 50.881067][ T1618] percpu 0 [ 50.881067][ T1618] sock 0 [ 50.881067][ T1618] vmalloc 0 [ 50.881067][ T1618] shmem 53248 [ 50.881067][ T1618] zswap 0 [ 50.881067][ T1618] zswapped 0 [ 50.881067][ T1618] file_mapped 0 [ 50.881067][ T1618] file_dirty 0 [ 50.881067][ T1618] file_writeback 0 [ 50.881067][ T1618] swapcached 8171520 [ 50.881067][ T1618] anon_thp 0 [ 50.881067][ T1618] file_thp 0 [ 50.881067][ T1618] shmem_thp 0 [ 50.881067][ T1618] inactive_anon 24576 [ 50.881067][ T1618] active_anon 28672 [ 50.881067][ T1618] inactive_file 0 [ 50.881067][ T1618] active_file 20480 [ 50.881067][ T1618] unevictable 0 [ 50.881067][ T1618] slab_reclaimable 15520 [ 50.881067][ T1618] slab_unreclaimable 5192 [ 50.881067][ T1618] slab 20712 [ 50.897987][ T1618] Out of memory and no killable processes... [ 50.899039][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 50.899066][ C1] I/O error, dev loop0, sector 3188 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 50.901396][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 50.902733][ C1] Buffer I/O error on dev loop0, logical block 1594, async page read [ 50.903911][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 50.907071][ T4446] Workqueue: loop0 loop_workfn [ 50.907953][ T4446] Call trace: [ 50.908622][ T4446] dump_backtrace+0x1c4/0x1f0 [ 50.909558][ T4446] show_stack+0x2c/0x3c [ 50.910370][ T4446] __dump_stack+0x30/0x40 [ 50.911213][ T4446] dump_stack_lvl+0xf4/0x15c [ 50.912082][ T4446] dump_stack+0x1c/0x5c [ 50.912842][ T4446] dump_header+0xc0/0x724 [ 50.913651][ T4446] out_of_memory+0xc78/0xf70 [ 50.914477][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 50.915456][ T4446] try_charge_memcg+0xa4c/0x1390 [ 50.916283][ T4446] charge_memcg+0xa4/0x1f0 [ 50.917027][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 50.918064][ T4446] __read_swap_cache_async+0x378/0x688 [ 50.919028][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 50.919974][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 50.920892][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 50.921826][ T4446] shmem_file_read_iter+0x210/0x954 [ 50.922742][ T4446] do_iter_read+0x4d4/0x8b4 [ 50.923551][ T4446] vfs_iter_read+0x88/0xac [ 50.924335][ T4446] loop_process_work+0xbf0/0x200c [ 50.925275][ T4446] loop_workfn+0x48/0x58 [ 50.926040][ T4446] process_one_work+0x7e4/0x13bc [ 50.926942][ T4446] worker_thread+0x8cc/0xfe8 [ 50.927788][ T4446] kthread+0x254/0x2e0 [ 50.928536][ T4446] ret_from_fork+0x10/0x20 [ 50.929889][ T4446] memory: usage 96kB, limit 96kB, failcnt 42310 [ 50.931011][ T4446] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 50.932369][ T4446] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 50.933416][ T4446] Memory cgroup stats for /syz0/test: [ 50.933493][ T4446] anon 0 [ 50.933493][ T4446] file 65536 [ 50.933493][ T4446] kernel 24576 [ 50.933493][ T4446] kernel_stack 0 [ 50.933493][ T4446] pagetables 0 [ 50.933493][ T4446] sec_pagetables 0 [ 50.933493][ T4446] percpu 0 [ 50.933493][ T4446] sock 0 [ 50.933493][ T4446] vmalloc 0 [ 50.933493][ T4446] shmem 53248 [ 50.933493][ T4446] zswap 0 [ 50.933493][ T4446] zswapped 0 [ 50.933493][ T4446] file_mapped 0 [ 50.933493][ T4446] file_dirty 0 [ 50.933493][ T4446] file_writeback 0 [ 50.933493][ T4446] swapcached 8171520 [ 50.933493][ T4446] anon_thp 0 [ 50.933493][ T4446] file_thp 0 [ 50.933493][ T4446] shmem_thp 0 [ 50.933493][ T4446] inactive_anon 24576 [ 50.933493][ T4446] active_anon 28672 [ 50.933493][ T4446] inactive_file 0 [ 50.933493][ T4446] active_file 20480 [ 50.933493][ T4446] unevictable 0 [ 50.933493][ T4446] slab_reclaimable 15520 [ 50.933493][ T4446] slab_unreclaimable 5192 [ 50.933493][ T4446] slab 20712 [ 50.950348][ T4446] Out of memory and no killable processes... [ 50.951455][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 50.951503][ C0] I/O error, dev loop0, sector 264 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 50.953467][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 50.956397][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 50.957931][ T1618] Workqueue: loop0 loop_rootcg_workfn [ 50.958910][ T1618] Call trace: [ 50.959531][ T1618] dump_backtrace+0x1c4/0x1f0 [ 50.960387][ T1618] show_stack+0x2c/0x3c [ 50.961150][ T1618] __dump_stack+0x30/0x40 [ 50.961942][ T1618] dump_stack_lvl+0xf4/0x15c [ 50.962779][ T1618] dump_stack+0x1c/0x5c [ 50.963531][ T1618] dump_header+0xc0/0x724 [ 50.964349][ T1618] out_of_memory+0xc78/0xf70 [ 50.965173][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 50.966175][ T1618] try_charge_memcg+0xa4c/0x1390 [ 50.967054][ T1618] charge_memcg+0xa4/0x1f0 [ 50.967812][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 50.968850][ T1618] __read_swap_cache_async+0x378/0x688 [ 50.969797][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 50.970712][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 50.971568][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 50.972472][ T1618] shmem_file_read_iter+0x210/0x954 [ 50.973352][ T1618] do_iter_read+0x4d4/0x8b4 [ 50.974123][ T1618] vfs_iter_read+0x88/0xac [ 50.974925][ T1618] loop_process_work+0xbf0/0x200c [ 50.975817][ T1618] loop_rootcg_workfn+0x28/0x38 [ 50.976706][ T1618] process_one_work+0x7e4/0x13bc [ 50.977576][ T1618] worker_thread+0x8cc/0xfe8 [ 50.978396][ T1618] kthread+0x254/0x2e0 [ 50.979108][ T1618] ret_from_fork+0x10/0x20 [ 50.980054][ T1618] memory: usage 96kB, limit 96kB, failcnt 42329 [ 50.981148][ T1618] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 50.982430][ T1618] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 50.983635][ T1618] Memory cgroup stats for /syz0/test: [ 50.983709][ T1618] anon 0 [ 50.983709][ T1618] file 65536 [ 50.983709][ T1618] kernel 24576 [ 50.983709][ T1618] kernel_stack 0 [ 50.983709][ T1618] pagetables 0 [ 50.983709][ T1618] sec_pagetables 0 [ 50.983709][ T1618] percpu 0 [ 50.983709][ T1618] sock 0 [ 50.983709][ T1618] vmalloc 0 [ 50.983709][ T1618] shmem 53248 [ 50.983709][ T1618] zswap 0 [ 50.983709][ T1618] zswapped 0 [ 50.983709][ T1618] file_mapped 0 [ 50.983709][ T1618] file_dirty 0 [ 50.983709][ T1618] file_writeback 0 [ 50.983709][ T1618] swapcached 8171520 [ 50.983709][ T1618] anon_thp 0 [ 50.983709][ T1618] file_thp 0 [ 50.983709][ T1618] shmem_thp 0 [ 50.983709][ T1618] inactive_anon 24576 [ 50.983709][ T1618] active_anon 28672 [ 50.983709][ T1618] inactive_file 0 [ 50.983709][ T1618] active_file 20480 [ 50.983709][ T1618] unevictable 0 [ 50.983709][ T1618] slab_reclaimable 15520 [ 50.983709][ T1618] slab_unreclaimable 5192 [ 50.983709][ T1618] slab 20712 [ 51.001238][ T1618] Out of memory and no killable processes... [ 51.002259][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 51.002309][ C1] Buffer I/O error on dev loop0, logical block 1595, async page read [ 51.004774][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 51.007088][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.008926][ T4446] Workqueue: loop0 loop_workfn [ 51.009822][ T4446] Call trace: [ 51.010433][ T4446] dump_backtrace+0x1c4/0x1f0 [ 51.011325][ T4446] show_stack+0x2c/0x3c [ 51.012093][ T4446] __dump_stack+0x30/0x40 [ 51.012877][ T4446] dump_stack_lvl+0xf4/0x15c [ 51.013713][ T4446] dump_stack+0x1c/0x5c [ 51.014488][ T4446] dump_header+0xc0/0x724 [ 51.015274][ T4446] out_of_memory+0xc78/0xf70 [ 51.016063][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 51.017060][ T4446] try_charge_memcg+0xa4c/0x1390 [ 51.017967][ T4446] charge_memcg+0xa4/0x1f0 [ 51.018773][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 51.019888][ T4446] __read_swap_cache_async+0x378/0x688 [ 51.020857][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 51.021843][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 51.022786][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 51.023747][ T4446] shmem_file_read_iter+0x210/0x954 [ 51.024678][ T4446] do_iter_read+0x4d4/0x8b4 [ 51.025458][ T4446] vfs_iter_read+0x88/0xac [ 51.026211][ T4446] loop_process_work+0xbf0/0x200c [ 51.027119][ T4446] loop_workfn+0x48/0x58 [ 51.027874][ T4446] process_one_work+0x7e4/0x13bc [ 51.028746][ T4446] worker_thread+0x8cc/0xfe8 [ 51.029551][ T4446] kthread+0x254/0x2e0 [ 51.030254][ T4446] ret_from_fork+0x10/0x20 [ 51.032740][ T4446] memory: usage 96kB, limit 96kB, failcnt 42348 [ 51.033816][ T4446] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 51.035036][ T4446] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 51.036090][ T4446] Memory cgroup stats for /syz0/test: [ 51.036161][ T4446] anon 0 [ 51.036161][ T4446] file 65536 [ 51.036161][ T4446] kernel 24576 [ 51.036161][ T4446] kernel_stack 0 [ 51.036161][ T4446] pagetables 0 [ 51.036161][ T4446] sec_pagetables 0 [ 51.036161][ T4446] percpu 0 [ 51.036161][ T4446] sock 0 [ 51.036161][ T4446] vmalloc 0 [ 51.036161][ T4446] shmem 53248 [ 51.036161][ T4446] zswap 0 [ 51.036161][ T4446] zswapped 0 [ 51.036161][ T4446] file_mapped 0 [ 51.036161][ T4446] file_dirty 0 [ 51.036161][ T4446] file_writeback 0 [ 51.036161][ T4446] swapcached 8171520 [ 51.036161][ T4446] anon_thp 0 [ 51.036161][ T4446] file_thp 0 [ 51.036161][ T4446] shmem_thp 0 [ 51.036161][ T4446] inactive_anon 24576 [ 51.036161][ T4446] active_anon 28672 [ 51.036161][ T4446] inactive_file 0 [ 51.036161][ T4446] active_file 20480 [ 51.036161][ T4446] unevictable 0 [ 51.036161][ T4446] slab_reclaimable 15520 [ 51.036161][ T4446] slab_unreclaimable 5192 [ 51.036161][ T4446] slab 20712 [ 51.053845][ T4446] Out of memory and no killable processes... [ 51.054775][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 51.056806][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 51.057953][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.059639][ T1618] Workqueue: loop0 loop_rootcg_workfn [ 51.060589][ T1618] Call trace: [ 51.061177][ T1618] dump_backtrace+0x1c4/0x1f0 [ 51.062005][ T1618] show_stack+0x2c/0x3c [ 51.062757][ T1618] __dump_stack+0x30/0x40 [ 51.063553][ T1618] dump_stack_lvl+0xf4/0x15c [ 51.064361][ T1618] dump_stack+0x1c/0x5c [ 51.065061][ T1618] dump_header+0xc0/0x724 [ 51.065777][ T1618] out_of_memory+0xc78/0xf70 [ 51.066518][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 51.067449][ T1618] try_charge_memcg+0xa4c/0x1390 [ 51.068272][ T1618] charge_memcg+0xa4/0x1f0 [ 51.069029][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 51.070070][ T1618] __read_swap_cache_async+0x378/0x688 [ 51.071018][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 51.071958][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 51.072847][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 51.073748][ T1618] shmem_file_read_iter+0x210/0x954 [ 51.074643][ T1618] do_iter_read+0x4d4/0x8b4 [ 51.075402][ T1618] vfs_iter_read+0x88/0xac [ 51.076178][ T1618] loop_process_work+0xbf0/0x200c [ 51.077026][ T1618] loop_rootcg_workfn+0x28/0x38 [ 51.077852][ T1618] process_one_work+0x7e4/0x13bc [ 51.078708][ T1618] worker_thread+0x8cc/0xfe8 [ 51.079478][ T1618] kthread+0x254/0x2e0 [ 51.080154][ T1618] ret_from_fork+0x10/0x20 [ 51.083242][ T1618] memory: usage 96kB, limit 96kB, failcnt 42367 [ 51.084242][ T1618] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 51.085520][ T1618] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 51.086657][ T1618] Memory cgroup stats for /syz0/test: [ 51.086738][ T1618] anon 0 [ 51.086738][ T1618] file 65536 [ 51.086738][ T1618] kernel 24576 [ 51.086738][ T1618] kernel_stack 0 [ 51.086738][ T1618] pagetables 0 [ 51.086738][ T1618] sec_pagetables 0 [ 51.086738][ T1618] percpu 0 [ 51.086738][ T1618] sock 0 [ 51.086738][ T1618] vmalloc 0 [ 51.086738][ T1618] shmem 53248 [ 51.086738][ T1618] zswap 0 [ 51.086738][ T1618] zswapped 0 [ 51.086738][ T1618] file_mapped 0 [ 51.086738][ T1618] file_dirty 0 [ 51.086738][ T1618] file_writeback 0 [ 51.086738][ T1618] swapcached 8171520 [ 51.086738][ T1618] anon_thp 0 [ 51.086738][ T1618] file_thp 0 [ 51.086738][ T1618] shmem_thp 0 [ 51.086738][ T1618] inactive_anon 24576 [ 51.086738][ T1618] active_anon 28672 [ 51.086738][ T1618] inactive_file 0 [ 51.086738][ T1618] active_file 20480 [ 51.086738][ T1618] unevictable 0 [ 51.086738][ T1618] slab_reclaimable 15520 [ 51.086738][ T1618] slab_unreclaimable 5192 [ 51.086738][ T1618] slab 20712 [ 51.103152][ T1618] Out of memory and no killable processes... [ 51.104504][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 51.104525][ C0] Buffer I/O error on dev loop0, logical block 1592, async page read [ 51.106651][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 51.109211][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.110867][ T4446] Workqueue: loop0 loop_workfn [ 51.111694][ T4446] Call trace: [ 51.112234][ T4446] dump_backtrace+0x1c4/0x1f0 [ 51.113026][ T4446] show_stack+0x2c/0x3c [ 51.113738][ T4446] __dump_stack+0x30/0x40 [ 51.114515][ T4446] dump_stack_lvl+0xf4/0x15c [ 51.115312][ T4446] dump_stack+0x1c/0x5c [ 51.116024][ T4446] dump_header+0xc0/0x724 [ 51.116807][ T4446] out_of_memory+0xc78/0xf70 [ 51.117660][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 51.118666][ T4446] try_charge_memcg+0xa4c/0x1390 [ 51.119553][ T4446] charge_memcg+0xa4/0x1f0 [ 51.120336][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 51.121389][ T4446] __read_swap_cache_async+0x378/0x688 [ 51.122312][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 51.123213][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 51.124115][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 51.125011][ T4446] shmem_file_read_iter+0x210/0x954 [ 51.125928][ T4446] do_iter_read+0x4d4/0x8b4 [ 51.126698][ T4446] vfs_iter_read+0x88/0xac [ 51.127458][ T4446] loop_process_work+0xbf0/0x200c [ 51.128360][ T4446] loop_workfn+0x48/0x58 [ 51.129100][ T4446] process_one_work+0x7e4/0x13bc [ 51.129963][ T4446] worker_thread+0x8cc/0xfe8 [ 51.130784][ T4446] kthread+0x254/0x2e0 [ 51.131534][ T4446] ret_from_fork+0x10/0x20 [ 51.133529][ T4446] memory: usage 96kB, limit 96kB, failcnt 42386 [ 51.134606][ T4446] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 51.135984][ T4446] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 51.137154][ T4446] Memory cgroup stats for /syz0/test: [ 51.137222][ T4446] anon 0 [ 51.137222][ T4446] file 65536 [ 51.137222][ T4446] kernel 24576 [ 51.137222][ T4446] kernel_stack 0 [ 51.137222][ T4446] pagetables 0 [ 51.137222][ T4446] sec_pagetables 0 [ 51.137222][ T4446] percpu 0 [ 51.137222][ T4446] sock 0 [ 51.137222][ T4446] vmalloc 0 [ 51.137222][ T4446] shmem 53248 [ 51.137222][ T4446] zswap 0 [ 51.137222][ T4446] zswapped 0 [ 51.137222][ T4446] file_mapped 0 [ 51.137222][ T4446] file_dirty 0 [ 51.137222][ T4446] file_writeback 0 [ 51.137222][ T4446] swapcached 8171520 [ 51.137222][ T4446] anon_thp 0 [ 51.137222][ T4446] file_thp 0 [ 51.137222][ T4446] shmem_thp 0 [ 51.137222][ T4446] inactive_anon 24576 [ 51.137222][ T4446] active_anon 28672 [ 51.137222][ T4446] inactive_file 0 [ 51.137222][ T4446] active_file 20480 [ 51.137222][ T4446] unevictable 0 [ 51.137222][ T4446] slab_reclaimable 15520 [ 51.137222][ T4446] slab_unreclaimable 5192 [ 51.137222][ T4446] slab 20712 [ 51.153738][ T4446] Out of memory and no killable processes... [ 51.154820][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 51.156999][ T1618] CPU: 0 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 51.158193][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.159858][ T1618] Workqueue: loop0 loop_rootcg_workfn [ 51.160771][ T1618] Call trace: [ 51.161337][ T1618] dump_backtrace+0x1c4/0x1f0 [ 51.162149][ T1618] show_stack+0x2c/0x3c [ 51.162877][ T1618] __dump_stack+0x30/0x40 [ 51.163690][ T1618] dump_stack_lvl+0xf4/0x15c [ 51.164506][ T1618] dump_stack+0x1c/0x5c [ 51.165206][ T1618] dump_header+0xc0/0x724 [ 51.165945][ T1618] out_of_memory+0xc78/0xf70 [ 51.166704][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 51.167629][ T1618] try_charge_memcg+0xa4c/0x1390 [ 51.168472][ T1618] charge_memcg+0xa4/0x1f0 [ 51.169218][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 51.170227][ T1618] __read_swap_cache_async+0x378/0x688 [ 51.171132][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 51.172068][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 51.173001][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 51.173949][ T1618] shmem_file_read_iter+0x210/0x954 [ 51.174895][ T1618] do_iter_read+0x4d4/0x8b4 [ 51.175703][ T1618] vfs_iter_read+0x88/0xac [ 51.176478][ T1618] loop_process_work+0xbf0/0x200c [ 51.177362][ T1618] loop_rootcg_workfn+0x28/0x38 [ 51.178178][ T1618] process_one_work+0x7e4/0x13bc [ 51.179002][ T1618] worker_thread+0x8cc/0xfe8 [ 51.179778][ T1618] kthread+0x254/0x2e0 [ 51.180454][ T1618] ret_from_fork+0x10/0x20 [ 51.182071][ T1618] memory: usage 96kB, limit 96kB, failcnt 42405 [ 51.183084][ T1618] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 51.184334][ T1618] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 51.185404][ T1618] Memory cgroup stats for /syz0/test: [ 51.185486][ T1618] anon 0 [ 51.185486][ T1618] file 65536 [ 51.185486][ T1618] kernel 24576 [ 51.185486][ T1618] kernel_stack 0 [ 51.185486][ T1618] pagetables 0 [ 51.185486][ T1618] sec_pagetables 0 [ 51.185486][ T1618] percpu 0 [ 51.185486][ T1618] sock 0 [ 51.185486][ T1618] vmalloc 0 [ 51.185486][ T1618] shmem 53248 [ 51.185486][ T1618] zswap 0 [ 51.185486][ T1618] zswapped 0 [ 51.185486][ T1618] file_mapped 0 [ 51.185486][ T1618] file_dirty 0 [ 51.185486][ T1618] file_writeback 0 [ 51.185486][ T1618] swapcached 8171520 [ 51.185486][ T1618] anon_thp 0 [ 51.185486][ T1618] file_thp 0 [ 51.185486][ T1618] shmem_thp 0 [ 51.185486][ T1618] inactive_anon 24576 [ 51.185486][ T1618] active_anon 28672 [ 51.185486][ T1618] inactive_file 0 [ 51.185486][ T1618] active_file 20480 [ 51.185486][ T1618] unevictable 0 [ 51.185486][ T1618] slab_reclaimable 15520 [ 51.185486][ T1618] slab_unreclaimable 5192 [ 51.185486][ T1618] slab 20712 [ 51.200992][ T1618] Out of memory and no killable processes... [ 51.202036][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 51.202052][ C0] Buffer I/O error on dev loop0, logical block 1593, async page read [ 51.204310][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 51.206841][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.208611][ T4446] Workqueue: loop0 loop_workfn [ 51.209474][ T4446] Call trace: [ 51.210050][ T4446] dump_backtrace+0x1c4/0x1f0 [ 51.210886][ T4446] show_stack+0x2c/0x3c [ 51.211640][ T4446] __dump_stack+0x30/0x40 [ 51.212408][ T4446] dump_stack_lvl+0xf4/0x15c [ 51.213208][ T4446] dump_stack+0x1c/0x5c [ 51.213951][ T4446] dump_header+0xc0/0x724 [ 51.214692][ T4446] out_of_memory+0xc78/0xf70 [ 51.215481][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 51.216421][ T4446] try_charge_memcg+0xa4c/0x1390 [ 51.217294][ T4446] charge_memcg+0xa4/0x1f0 [ 51.218094][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 51.219166][ T4446] __read_swap_cache_async+0x378/0x688 [ 51.220136][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 51.221090][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 51.221984][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 51.222874][ T4446] shmem_file_read_iter+0x210/0x954 [ 51.223785][ T4446] do_iter_read+0x4d4/0x8b4 [ 51.224545][ T4446] vfs_iter_read+0x88/0xac [ 51.225296][ T4446] loop_process_work+0xbf0/0x200c [ 51.226150][ T4446] loop_workfn+0x48/0x58 [ 51.226881][ T4446] process_one_work+0x7e4/0x13bc [ 51.227737][ T4446] worker_thread+0x8cc/0xfe8 [ 51.228524][ T4446] kthread+0x254/0x2e0 [ 51.229223][ T4446] ret_from_fork+0x10/0x20 [ 51.231313][ T4446] memory: usage 96kB, limit 96kB, failcnt 42424 [ 51.232255][ T4446] memory+swap: usage 2368kB, limit 9007199254740988kB, failcnt 0 [ 51.233434][ T4446] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 51.234507][ T4446] Memory cgroup stats for /syz0/test: [ 51.234572][ T4446] anon 0 [ 51.234572][ T4446] file 65536 [ 51.234572][ T4446] kernel 24576 [ 51.234572][ T4446] kernel_stack 0 [ 51.234572][ T4446] pagetables 0 [ 51.234572][ T4446] sec_pagetables 0 [ 51.234572][ T4446] percpu 0 [ 51.234572][ T4446] sock 0 [ 51.234572][ T4446] vmalloc 0 [ 51.234572][ T4446] shmem 53248 [ 51.234572][ T4446] zswap 0 [ 51.234572][ T4446] zswapped 0 [ 51.234572][ T4446] file_mapped 0 [ 51.234572][ T4446] file_dirty 0 [ 51.234572][ T4446] file_writeback 0 [ 51.234572][ T4446] swapcached 8171520 [ 51.234572][ T4446] anon_thp 0 [ 51.234572][ T4446] file_thp 0 [ 51.234572][ T4446] shmem_thp 0 [ 51.234572][ T4446] inactive_anon 24576 [ 51.234572][ T4446] active_anon 28672 [ 51.234572][ T4446] inactive_file 0 [ 51.234572][ T4446] active_file 20480 [ 51.234572][ T4446] unevictable 0 [ 51.234572][ T4446] slab_reclaimable 15520 [ 51.234572][ T4446] slab_unreclaimable 5192 [ 51.234572][ T4446] slab 20712 [ 51.254306][ T4446] Out of memory and no killable processes... [ 51.255409][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 51.263671][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 51.265004][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.266560][ T1618] Workqueue: loop0 loop_rootcg_workfn [ 51.267433][ T1618] Call trace: [ 51.267985][ T1618] dump_backtrace+0x1c4/0x1f0 [ 51.268804][ T1618] show_stack+0x2c/0x3c [ 51.269552][ T1618] __dump_stack+0x30/0x40 [ 51.270322][ T1618] dump_stack_lvl+0xf4/0x15c [ 51.271116][ T1618] dump_stack+0x1c/0x5c [ 51.271844][ T1618] dump_header+0xc0/0x724 [ 51.272610][ T1618] out_of_memory+0xc78/0xf70 [ 51.273416][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 51.274482][ T1618] try_charge_memcg+0xa4c/0x1390 [ 51.275347][ T1618] charge_memcg+0xa4/0x1f0 [ 51.276124][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 51.277203][ T1618] __read_swap_cache_async+0x378/0x688 [ 51.278128][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 51.279051][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 51.279968][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 51.280900][ T1618] shmem_file_read_iter+0x210/0x954 [ 51.281815][ T1618] do_iter_read+0x4d4/0x8b4 [ 51.282642][ T1618] vfs_iter_read+0x88/0xac [ 51.283392][ T1618] loop_process_work+0xbf0/0x200c [ 51.284241][ T1618] loop_rootcg_workfn+0x28/0x38 [ 51.285067][ T1618] process_one_work+0x7e4/0x13bc [ 51.285948][ T1618] worker_thread+0x8cc/0xfe8 [ 51.286734][ T1618] kthread+0x254/0x2e0 [ 51.287440][ T1618] ret_from_fork+0x10/0x20 [ 51.289021][ T1618] memory: usage 92kB, limit 96kB, failcnt 42424 [ 51.290075][ T1618] memory+swap: usage 2364kB, limit 9007199254740988kB, failcnt 0 [ 51.291396][ T1618] kmem: usage 20kB, limit 9007199254740988kB, failcnt 0 [ 51.292546][ T1618] Memory cgroup stats for /syz0/test: [ 51.292644][ T1618] anon 0 [ 51.292644][ T1618] file 57344 [ 51.292644][ T1618] kernel 20480 [ 51.292644][ T1618] kernel_stack 0 [ 51.292644][ T1618] pagetables 0 [ 51.292644][ T1618] sec_pagetables 0 [ 51.292644][ T1618] percpu 0 [ 51.292644][ T1618] sock 0 [ 51.292644][ T1618] vmalloc 0 [ 51.292644][ T1618] shmem 53248 [ 51.292644][ T1618] zswap 0 [ 51.292644][ T1618] zswapped 0 [ 51.292644][ T1618] file_mapped 0 [ 51.292644][ T1618] file_dirty 0 [ 51.292644][ T1618] file_writeback 0 [ 51.292644][ T1618] swapcached 8171520 [ 51.292644][ T1618] anon_thp 0 [ 51.292644][ T1618] file_thp 0 [ 51.292644][ T1618] shmem_thp 0 [ 51.292644][ T1618] inactive_anon 24576 [ 51.292644][ T1618] active_anon 28672 [ 51.292644][ T1618] inactive_file 0 [ 51.292644][ T1618] active_file 20480 [ 51.292644][ T1618] unevictable 0 [ 51.292644][ T1618] slab_reclaimable 15520 [ 51.292644][ T1618] slab_unreclaimable 3896 [ 51.292644][ T1618] slab 19416 [ 51.307969][ T1618] Out of memory and no killable processes... [ 51.309021][ C1] Buffer I/O error on dev loop0, logical block 1594, async page read [ 51.415664][ T4510] loop0: detected capacity change from 0 to 4096 [ 51.426582][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 51.429025][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 51.430316][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.431896][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 51.432768][ T4446] Call trace: [ 51.433333][ T4446] dump_backtrace+0x1c4/0x1f0 [ 51.434059][ T4446] show_stack+0x2c/0x3c [ 51.434726][ T4446] __dump_stack+0x30/0x40 [ 51.435431][ T4446] dump_stack_lvl+0xf4/0x15c [ 51.436177][ T4446] dump_stack+0x1c/0x5c [ 51.436881][ T4446] dump_header+0xc0/0x724 [ 51.437543][ T4446] oom_kill_process+0x35c/0x660 [ 51.438393][ T4446] out_of_memory+0xbf0/0xf70 [ 51.439165][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 51.440165][ T4446] try_charge_memcg+0xa4c/0x1390 [ 51.441009][ T4446] charge_memcg+0xa4/0x1f0 [ 51.441803][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 51.442950][ T4446] __read_swap_cache_async+0x378/0x688 [ 51.443928][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 51.444857][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 51.445752][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 51.446699][ T4446] shmem_file_read_iter+0x210/0x954 [ 51.447567][ T4446] do_iter_read+0x4d4/0x8b4 [ 51.448390][ T4446] vfs_iter_read+0x88/0xac [ 51.449145][ T4446] loop_process_work+0xbf0/0x200c [ 51.450012][ T4446] loop_rootcg_workfn+0x28/0x38 [ 51.450858][ T4446] process_one_work+0x7e4/0x13bc [ 51.451736][ T4446] worker_thread+0x8cc/0xfe8 [ 51.452535][ T4446] kthread+0x254/0x2e0 [ 51.453223][ T4446] ret_from_fork+0x10/0x20 [ 51.454170][ T4446] memory: usage 96kB, limit 96kB, failcnt 43520 [ 51.455212][ T4446] memory+swap: usage 2664kB, limit 9007199254740988kB, failcnt 0 [ 51.456525][ T4446] kmem: usage 32kB, limit 9007199254740988kB, failcnt 0 [ 51.457634][ T4446] Memory cgroup stats for /syz0/test: [ 51.457720][ T4446] anon 0 [ 51.457720][ T4446] file 65536 [ 51.457720][ T4446] kernel 32768 [ 51.457720][ T4446] kernel_stack 0 [ 51.457720][ T4446] pagetables 0 [ 51.457720][ T4446] sec_pagetables 0 [ 51.457720][ T4446] percpu 0 [ 51.457720][ T4446] sock 0 [ 51.457720][ T4446] vmalloc 0 [ 51.457720][ T4446] shmem 40960 [ 51.457720][ T4446] zswap 0 [ 51.457720][ T4446] zswapped 0 [ 51.457720][ T4446] file_mapped 0 [ 51.457720][ T4446] file_dirty 0 [ 51.457720][ T4446] file_writeback 0 [ 51.457720][ T4446] swapcached 12120064 [ 51.457720][ T4446] anon_thp 0 [ 51.457720][ T4446] file_thp 0 [ 51.457720][ T4446] shmem_thp 0 [ 51.457720][ T4446] inactive_anon 32768 [ 51.457720][ T4446] active_anon 8192 [ 51.457720][ T4446] inactive_file 0 [ 51.457720][ T4446] active_file 24576 [ 51.457720][ T4446] unevictable 0 [ 51.457720][ T4446] slab_reclaimable 16432 [ 51.457720][ T4446] slab_unreclaimable 5840 [ 51.457720][ T4446] slab 22272 [ 51.472976][ T4446] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.19,pid=4510,uid=0 [ 51.475595][ T4446] Memory cgroup out of memory: Killed process 4510 (syz.0.19) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 51.839344][ T79] team0 (unregistering): Port device team_slave_1 removed [ 51.999531][ T79] team0 (unregistering): Port device team_slave_0 removed [ 52.168340][ T79] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 52.368375][ T79] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 53.523697][ T29] oom_reaper: reaped process 4510 (syz.0.19), now anon-rss:0kB, file-rss:72kB, shmem-rss:0kB [ 53.526396][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.529016][ T1618] CPU: 0 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 53.530401][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.531978][ T1618] Workqueue: loop0 loop_workfn [ 53.532756][ T1618] Call trace: [ 53.533304][ T1618] dump_backtrace+0x1c4/0x1f0 [ 53.534060][ T1618] show_stack+0x2c/0x3c [ 53.534717][ T1618] __dump_stack+0x30/0x40 [ 53.535546][ T1618] dump_stack_lvl+0xf4/0x15c [ 53.536415][ T1618] dump_stack+0x1c/0x5c [ 53.537155][ T1618] dump_header+0xc0/0x724 [ 53.537914][ T1618] out_of_memory+0xc78/0xf70 [ 53.538761][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.539774][ T1618] try_charge_memcg+0xa4c/0x1390 [ 53.540681][ T1618] charge_memcg+0xa4/0x1f0 [ 53.541521][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.542632][ T1618] __read_swap_cache_async+0x378/0x688 [ 53.543630][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 53.544587][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 53.545547][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 53.546450][ T1618] shmem_file_read_iter+0x210/0x954 [ 53.547317][ T1618] do_iter_read+0x4d4/0x8b4 [ 53.548092][ T1618] vfs_iter_read+0x88/0xac [ 53.548866][ T1618] loop_process_work+0xbf0/0x200c [ 53.549711][ T1618] loop_workfn+0x48/0x58 [ 53.550490][ T1618] process_one_work+0x7e4/0x13bc [ 53.551374][ T1618] worker_thread+0x8cc/0xfe8 [ 53.552214][ T1618] kthread+0x254/0x2e0 [ 53.552945][ T1618] ret_from_fork+0x10/0x20 [ 53.557965][ T1618] memory: usage 96kB, limit 96kB, failcnt 82826 [ 53.558891][ T1618] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.560148][ T1618] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.561207][ T1618] Memory cgroup stats for /syz0/test: [ 53.561275][ T1618] anon 0 [ 53.561275][ T1618] file 69632 [ 53.561275][ T1618] kernel 28672 [ 53.561275][ T1618] kernel_stack 0 [ 53.561275][ T1618] pagetables 0 [ 53.561275][ T1618] sec_pagetables 0 [ 53.561275][ T1618] percpu 0 [ 53.561275][ T1618] sock 0 [ 53.561275][ T1618] vmalloc 0 [ 53.561275][ T1618] shmem 40960 [ 53.561275][ T1618] zswap 0 [ 53.561275][ T1618] zswapped 0 [ 53.561275][ T1618] file_mapped 0 [ 53.561275][ T1618] file_dirty 0 [ 53.561275][ T1618] file_writeback 0 [ 53.561275][ T1618] swapcached 12120064 [ 53.561275][ T1618] anon_thp 0 [ 53.561275][ T1618] file_thp 0 [ 53.561275][ T1618] shmem_thp 0 [ 53.561275][ T1618] inactive_anon 32768 [ 53.561275][ T1618] active_anon 8192 [ 53.561275][ T1618] inactive_file 0 [ 53.561275][ T1618] active_file 28672 [ 53.561275][ T1618] unevictable 0 [ 53.561275][ T1618] slab_reclaimable 20672 [ 53.561275][ T1618] slab_unreclaimable 5840 [ 53.561275][ T1618] slab 26512 [ 53.578920][ T1618] Out of memory and no killable processes... [ 53.580003][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.580057][ C0] blk_print_req_error: 7 callbacks suppressed [ 53.580067][ C0] I/O error, dev loop0, sector 1944 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 53.582124][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 53.583212][ C0] __ntfs_error: 13 callbacks suppressed [ 53.583223][ C0] ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x3cc. [ 53.584613][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.590320][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 53.591371][ T4446] Call trace: [ 53.592020][ T4446] dump_backtrace+0x1c4/0x1f0 [ 53.592870][ T4446] show_stack+0x2c/0x3c [ 53.593632][ T4446] __dump_stack+0x30/0x40 [ 53.594404][ T4446] dump_stack_lvl+0xf4/0x15c [ 53.595205][ T4446] dump_stack+0x1c/0x5c [ 53.595937][ T4446] dump_header+0xc0/0x724 [ 53.596731][ T4446] out_of_memory+0xc78/0xf70 [ 53.597582][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.598585][ T4446] try_charge_memcg+0xa4c/0x1390 [ 53.599451][ T4446] charge_memcg+0xa4/0x1f0 [ 53.600229][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.601295][ T4446] __read_swap_cache_async+0x378/0x688 [ 53.602242][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 53.603209][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 53.604121][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 53.605114][ T4446] shmem_file_read_iter+0x210/0x954 [ 53.606083][ T4446] do_iter_read+0x4d4/0x8b4 [ 53.606894][ T4446] vfs_iter_read+0x88/0xac [ 53.607709][ T4446] loop_process_work+0xbf0/0x200c [ 53.608676][ T4446] loop_rootcg_workfn+0x28/0x38 [ 53.609547][ T4446] process_one_work+0x7e4/0x13bc [ 53.610408][ T4446] worker_thread+0x8cc/0xfe8 [ 53.611282][ T4446] kthread+0x254/0x2e0 [ 53.612054][ T4446] ret_from_fork+0x10/0x20 [ 53.614912][ T4446] memory: usage 96kB, limit 96kB, failcnt 82845 [ 53.616037][ T4446] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.617388][ T4446] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.618921][ T4446] Memory cgroup stats for /syz0/test: [ 53.618992][ T4446] anon 0 [ 53.618992][ T4446] file 69632 [ 53.618992][ T4446] kernel 28672 [ 53.618992][ T4446] kernel_stack 0 [ 53.618992][ T4446] pagetables 0 [ 53.618992][ T4446] sec_pagetables 0 [ 53.618992][ T4446] percpu 0 [ 53.618992][ T4446] sock 0 [ 53.618992][ T4446] vmalloc 0 [ 53.618992][ T4446] shmem 40960 [ 53.618992][ T4446] zswap 0 [ 53.618992][ T4446] zswapped 0 [ 53.618992][ T4446] file_mapped 0 [ 53.618992][ T4446] file_dirty 0 [ 53.618992][ T4446] file_writeback 0 [ 53.618992][ T4446] swapcached 12120064 [ 53.618992][ T4446] anon_thp 0 [ 53.618992][ T4446] file_thp 0 [ 53.618992][ T4446] shmem_thp 0 [ 53.618992][ T4446] inactive_anon 32768 [ 53.618992][ T4446] active_anon 8192 [ 53.618992][ T4446] inactive_file 0 [ 53.618992][ T4446] active_file 28672 [ 53.618992][ T4446] unevictable 0 [ 53.618992][ T4446] slab_reclaimable 21632 [ 53.618992][ T4446] slab_unreclaimable 5192 [ 53.618992][ T4446] slab 26824 [ 53.634777][ T4446] Out of memory and no killable processes... [ 53.635849][ C1] I/O error, dev loop0, sector 8 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 53.636650][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.640318][ T1618] CPU: 0 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 53.641738][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.643586][ T1618] Workqueue: loop0 loop_workfn [ 53.644433][ T1618] Call trace: [ 53.645014][ T1618] dump_backtrace+0x1c4/0x1f0 [ 53.645861][ T1618] show_stack+0x2c/0x3c [ 53.646657][ T1618] __dump_stack+0x30/0x40 [ 53.647423][ T1618] dump_stack_lvl+0xf4/0x15c [ 53.648228][ T1618] dump_stack+0x1c/0x5c [ 53.648965][ T1618] dump_header+0xc0/0x724 [ 53.649714][ T1618] out_of_memory+0xc78/0xf70 [ 53.650669][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.651704][ T1618] try_charge_memcg+0xa4c/0x1390 [ 53.652606][ T1618] charge_memcg+0xa4/0x1f0 [ 53.653444][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.654597][ T1618] __read_swap_cache_async+0x378/0x688 [ 53.655608][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 53.656618][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 53.657568][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 53.658485][ T1618] shmem_file_read_iter+0x210/0x954 [ 53.659380][ T1618] do_iter_read+0x4d4/0x8b4 [ 53.660167][ T1618] vfs_iter_read+0x88/0xac [ 53.660938][ T1618] loop_process_work+0xbf0/0x200c [ 53.661879][ T1618] loop_workfn+0x48/0x58 [ 53.662665][ T1618] process_one_work+0x7e4/0x13bc [ 53.663571][ T1618] worker_thread+0x8cc/0xfe8 [ 53.664416][ T1618] kthread+0x254/0x2e0 [ 53.665177][ T1618] ret_from_fork+0x10/0x20 [ 53.667931][ T1618] memory: usage 96kB, limit 96kB, failcnt 82864 [ 53.668965][ T1618] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.670176][ T1618] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.671336][ T1618] Memory cgroup stats for /syz0/test: [ 53.671418][ T1618] anon 0 [ 53.671418][ T1618] file 69632 [ 53.671418][ T1618] kernel 28672 [ 53.671418][ T1618] kernel_stack 0 [ 53.671418][ T1618] pagetables 0 [ 53.671418][ T1618] sec_pagetables 0 [ 53.671418][ T1618] percpu 0 [ 53.671418][ T1618] sock 0 [ 53.671418][ T1618] vmalloc 0 [ 53.671418][ T1618] shmem 40960 [ 53.671418][ T1618] zswap 0 [ 53.671418][ T1618] zswapped 0 [ 53.671418][ T1618] file_mapped 0 [ 53.671418][ T1618] file_dirty 0 [ 53.671418][ T1618] file_writeback 0 [ 53.671418][ T1618] swapcached 12120064 [ 53.671418][ T1618] anon_thp 0 [ 53.671418][ T1618] file_thp 0 [ 53.671418][ T1618] shmem_thp 0 [ 53.671418][ T1618] inactive_anon 32768 [ 53.671418][ T1618] active_anon 8192 [ 53.671418][ T1618] inactive_file 0 [ 53.671418][ T1618] active_file 28672 [ 53.671418][ T1618] unevictable 0 [ 53.671418][ T1618] slab_reclaimable 21632 [ 53.671418][ T1618] slab_unreclaimable 5192 [ 53.671418][ T1618] slab 26824 [ 53.687022][ T1618] Out of memory and no killable processes... [ 53.688066][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.690254][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 53.691448][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.693010][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 53.693918][ T4446] Call trace: [ 53.694437][ T4446] dump_backtrace+0x1c4/0x1f0 [ 53.695163][ T4446] show_stack+0x2c/0x3c [ 53.695797][ T4446] __dump_stack+0x30/0x40 [ 53.696498][ T4446] dump_stack_lvl+0xf4/0x15c [ 53.697219][ T4446] dump_stack+0x1c/0x5c [ 53.697866][ T4446] dump_header+0xc0/0x724 [ 53.698626][ T4446] out_of_memory+0xc78/0xf70 [ 53.699458][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.700453][ T4446] try_charge_memcg+0xa4c/0x1390 [ 53.701293][ T4446] charge_memcg+0xa4/0x1f0 [ 53.702065][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.703122][ T4446] __read_swap_cache_async+0x378/0x688 [ 53.704134][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 53.705090][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 53.706007][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 53.706951][ T4446] shmem_file_read_iter+0x210/0x954 [ 53.707908][ T4446] do_iter_read+0x4d4/0x8b4 [ 53.708746][ T4446] vfs_iter_read+0x88/0xac [ 53.709565][ T4446] loop_process_work+0xbf0/0x200c [ 53.710490][ T4446] loop_rootcg_workfn+0x28/0x38 [ 53.711350][ T4446] process_one_work+0x7e4/0x13bc [ 53.712251][ T4446] worker_thread+0x8cc/0xfe8 [ 53.713022][ T4446] kthread+0x254/0x2e0 [ 53.713738][ T4446] ret_from_fork+0x10/0x20 [ 53.714625][ C1] I/O error, dev loop0, sector 1946 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 53.716251][ C1] ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x3cd. [ 53.719105][ T4446] memory: usage 96kB, limit 96kB, failcnt 82871 [ 53.720188][ T4446] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.721548][ T4446] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.722775][ T4446] Memory cgroup stats for /syz0/test: [ 53.722854][ T4446] anon 0 [ 53.722854][ T4446] file 69632 [ 53.722854][ T4446] kernel 28672 [ 53.722854][ T4446] kernel_stack 0 [ 53.722854][ T4446] pagetables 0 [ 53.722854][ T4446] sec_pagetables 0 [ 53.722854][ T4446] percpu 0 [ 53.722854][ T4446] sock 0 [ 53.722854][ T4446] vmalloc 0 [ 53.722854][ T4446] shmem 40960 [ 53.722854][ T4446] zswap 0 [ 53.722854][ T4446] zswapped 0 [ 53.722854][ T4446] file_mapped 0 [ 53.722854][ T4446] file_dirty 0 [ 53.722854][ T4446] file_writeback 0 [ 53.722854][ T4446] swapcached 12120064 [ 53.722854][ T4446] anon_thp 0 [ 53.722854][ T4446] file_thp 0 [ 53.722854][ T4446] shmem_thp 0 [ 53.722854][ T4446] inactive_anon 32768 [ 53.722854][ T4446] active_anon 8192 [ 53.722854][ T4446] inactive_file 0 [ 53.722854][ T4446] active_file 28672 [ 53.722854][ T4446] unevictable 0 [ 53.722854][ T4446] slab_reclaimable 21632 [ 53.722854][ T4446] slab_unreclaimable 5192 [ 53.722854][ T4446] slab 26824 [ 53.744010][ T4446] Out of memory and no killable processes... [ 53.745057][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.745100][ C0] I/O error, dev loop0, sector 8 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 53.747094][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 53.748713][ C0] Buffer I/O error on dev loop0, logical block 4, async page read [ 53.749954][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.749970][ T1618] Workqueue: loop0 loop_workfn [ 53.753756][ T1618] Call trace: [ 53.754333][ T1618] dump_backtrace+0x1c4/0x1f0 [ 53.755119][ T1618] show_stack+0x2c/0x3c [ 53.755823][ T1618] __dump_stack+0x30/0x40 [ 53.756608][ T1618] dump_stack_lvl+0xf4/0x15c [ 53.757383][ T1618] dump_stack+0x1c/0x5c [ 53.758100][ T1618] dump_header+0xc0/0x724 [ 53.758845][ T1618] out_of_memory+0xc78/0xf70 [ 53.759649][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.760633][ T1618] try_charge_memcg+0xa4c/0x1390 [ 53.761461][ T1618] charge_memcg+0xa4/0x1f0 [ 53.762194][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.763273][ T1618] __read_swap_cache_async+0x378/0x688 [ 53.764241][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 53.765191][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 53.766054][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 53.766959][ T1618] shmem_file_read_iter+0x210/0x954 [ 53.767806][ T1618] do_iter_read+0x4d4/0x8b4 [ 53.768572][ T1618] vfs_iter_read+0x88/0xac [ 53.769311][ T1618] loop_process_work+0xbf0/0x200c [ 53.770169][ T1618] loop_workfn+0x48/0x58 [ 53.770899][ T1618] process_one_work+0x7e4/0x13bc [ 53.771767][ T1618] worker_thread+0x8cc/0xfe8 [ 53.772586][ T1618] kthread+0x254/0x2e0 [ 53.773318][ T1618] ret_from_fork+0x10/0x20 [ 53.774275][ T1618] memory: usage 96kB, limit 96kB, failcnt 82902 [ 53.775353][ T1618] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.776571][ T1618] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.777645][ T1618] Memory cgroup stats for /syz0/test: [ 53.777713][ T1618] anon 0 [ 53.777713][ T1618] file 69632 [ 53.777713][ T1618] kernel 28672 [ 53.777713][ T1618] kernel_stack 0 [ 53.777713][ T1618] pagetables 0 [ 53.777713][ T1618] sec_pagetables 0 [ 53.777713][ T1618] percpu 0 [ 53.777713][ T1618] sock 0 [ 53.777713][ T1618] vmalloc 0 [ 53.777713][ T1618] shmem 40960 [ 53.777713][ T1618] zswap 0 [ 53.777713][ T1618] zswapped 0 [ 53.777713][ T1618] file_mapped 0 [ 53.777713][ T1618] file_dirty 0 [ 53.777713][ T1618] file_writeback 0 [ 53.777713][ T1618] swapcached 12120064 [ 53.777713][ T1618] anon_thp 0 [ 53.777713][ T1618] file_thp 0 [ 53.777713][ T1618] shmem_thp 0 [ 53.777713][ T1618] inactive_anon 32768 [ 53.777713][ T1618] active_anon 8192 [ 53.777713][ T1618] inactive_file 0 [ 53.777713][ T1618] active_file 28672 [ 53.777713][ T1618] unevictable 0 [ 53.777713][ T1618] slab_reclaimable 21632 [ 53.777713][ T1618] slab_unreclaimable 5192 [ 53.777713][ T1618] slab 26824 [ 53.792859][ T1618] Out of memory and no killable processes... [ 53.793834][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.793861][ C1] I/O error, dev loop0, sector 1948 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 53.796235][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 53.797650][ C1] ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x3ce. [ 53.798975][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.798990][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 53.799010][ T4446] Call trace: [ 53.803705][ T4446] dump_backtrace+0x1c4/0x1f0 [ 53.804516][ T4446] show_stack+0x2c/0x3c [ 53.805242][ T4446] __dump_stack+0x30/0x40 [ 53.806010][ T4446] dump_stack_lvl+0xf4/0x15c [ 53.806824][ T4446] dump_stack+0x1c/0x5c [ 53.807581][ T4446] dump_header+0xc0/0x724 [ 53.808338][ T4446] out_of_memory+0xc78/0xf70 [ 53.809145][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.810100][ T4446] try_charge_memcg+0xa4c/0x1390 [ 53.810928][ T4446] charge_memcg+0xa4/0x1f0 [ 53.811664][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.812716][ T4446] __read_swap_cache_async+0x378/0x688 [ 53.813666][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 53.814568][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 53.815396][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 53.816294][ T4446] shmem_file_read_iter+0x210/0x954 [ 53.817232][ T4446] do_iter_read+0x4d4/0x8b4 [ 53.818023][ T4446] vfs_iter_read+0x88/0xac [ 53.818845][ T4446] loop_process_work+0xbf0/0x200c [ 53.819777][ T4446] loop_rootcg_workfn+0x28/0x38 [ 53.820669][ T4446] process_one_work+0x7e4/0x13bc [ 53.821534][ T4446] worker_thread+0x8cc/0xfe8 [ 53.822342][ T4446] kthread+0x254/0x2e0 [ 53.823037][ T4446] ret_from_fork+0x10/0x20 [ 53.828211][ T4446] memory: usage 96kB, limit 96kB, failcnt 82921 [ 53.829225][ T4446] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.830408][ T4446] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.831492][ T4446] Memory cgroup stats for /syz0/test: [ 53.831568][ T4446] anon 0 [ 53.831568][ T4446] file 69632 [ 53.831568][ T4446] kernel 28672 [ 53.831568][ T4446] kernel_stack 0 [ 53.831568][ T4446] pagetables 0 [ 53.831568][ T4446] sec_pagetables 0 [ 53.831568][ T4446] percpu 0 [ 53.831568][ T4446] sock 0 [ 53.831568][ T4446] vmalloc 0 [ 53.831568][ T4446] shmem 40960 [ 53.831568][ T4446] zswap 0 [ 53.831568][ T4446] zswapped 0 [ 53.831568][ T4446] file_mapped 0 [ 53.831568][ T4446] file_dirty 0 [ 53.831568][ T4446] file_writeback 0 [ 53.831568][ T4446] swapcached 12120064 [ 53.831568][ T4446] anon_thp 0 [ 53.831568][ T4446] file_thp 0 [ 53.831568][ T4446] shmem_thp 0 [ 53.831568][ T4446] inactive_anon 32768 [ 53.831568][ T4446] active_anon 8192 [ 53.831568][ T4446] inactive_file 0 [ 53.831568][ T4446] active_file 28672 [ 53.831568][ T4446] unevictable 0 [ 53.831568][ T4446] slab_reclaimable 21632 [ 53.831568][ T4446] slab_unreclaimable 5192 [ 53.831568][ T4446] slab 26824 [ 53.846847][ T4446] Out of memory and no killable processes... [ 53.847971][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.850116][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 53.851290][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.852813][ T1618] Workqueue: loop0 loop_workfn [ 53.853539][ T1618] Call trace: [ 53.854049][ T1618] dump_backtrace+0x1c4/0x1f0 [ 53.854795][ T1618] show_stack+0x2c/0x3c [ 53.855440][ T1618] __dump_stack+0x30/0x40 [ 53.856164][ T1618] dump_stack_lvl+0xf4/0x15c [ 53.856862][ T1618] dump_stack+0x1c/0x5c [ 53.857524][ T1618] dump_header+0xc0/0x724 [ 53.858238][ T1618] out_of_memory+0xc78/0xf70 [ 53.859069][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.860067][ T1618] try_charge_memcg+0xa4c/0x1390 [ 53.860928][ T1618] charge_memcg+0xa4/0x1f0 [ 53.861710][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.862782][ T1618] __read_swap_cache_async+0x378/0x688 [ 53.863764][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 53.864684][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 53.865581][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 53.866462][ T1618] shmem_file_read_iter+0x210/0x954 [ 53.867327][ T1618] do_iter_read+0x4d4/0x8b4 [ 53.868051][ T1618] vfs_iter_read+0x88/0xac [ 53.868807][ T1618] loop_process_work+0xbf0/0x200c [ 53.869658][ T1618] loop_workfn+0x48/0x58 [ 53.870371][ T1618] process_one_work+0x7e4/0x13bc [ 53.871249][ T1618] worker_thread+0x8cc/0xfe8 [ 53.872086][ T1618] kthread+0x254/0x2e0 [ 53.872816][ T1618] ret_from_fork+0x10/0x20 [ 53.873710][ C1] I/O error, dev loop0, sector 10 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 53.875192][ C1] Buffer I/O error on dev loop0, logical block 5, async page read [ 53.878588][ T1618] memory: usage 96kB, limit 96kB, failcnt 82940 [ 53.879576][ T1618] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.880788][ T1618] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.881846][ T1618] Memory cgroup stats for /syz0/test: [ 53.881909][ T1618] anon 0 [ 53.881909][ T1618] file 69632 [ 53.881909][ T1618] kernel 28672 [ 53.881909][ T1618] kernel_stack 0 [ 53.881909][ T1618] pagetables 0 [ 53.881909][ T1618] sec_pagetables 0 [ 53.881909][ T1618] percpu 0 [ 53.881909][ T1618] sock 0 [ 53.881909][ T1618] vmalloc 0 [ 53.881909][ T1618] shmem 40960 [ 53.881909][ T1618] zswap 0 [ 53.881909][ T1618] zswapped 0 [ 53.881909][ T1618] file_mapped 0 [ 53.881909][ T1618] file_dirty 0 [ 53.881909][ T1618] file_writeback 0 [ 53.881909][ T1618] swapcached 12120064 [ 53.881909][ T1618] anon_thp 0 [ 53.881909][ T1618] file_thp 0 [ 53.881909][ T1618] shmem_thp 0 [ 53.881909][ T1618] inactive_anon 32768 [ 53.881909][ T1618] active_anon 8192 [ 53.881909][ T1618] inactive_file 0 [ 53.881909][ T1618] active_file 28672 [ 53.881909][ T1618] unevictable 0 [ 53.881909][ T1618] slab_reclaimable 21632 [ 53.881909][ T1618] slab_unreclaimable 5192 [ 53.881909][ T1618] slab 26824 [ 53.888893][ T79] bond0 (unregistering): Released all slaves [ 53.897200][ T1618] Out of memory and no killable processes... [ 53.899266][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.901320][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 53.902449][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.903926][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 53.904731][ T4446] Call trace: [ 53.905209][ T4446] dump_backtrace+0x1c4/0x1f0 [ 53.905914][ T4446] show_stack+0x2c/0x3c [ 53.906570][ T4446] __dump_stack+0x30/0x40 [ 53.907301][ T4446] dump_stack_lvl+0xf4/0x15c [ 53.908085][ T4446] dump_stack+0x1c/0x5c [ 53.908795][ T4446] dump_header+0xc0/0x724 [ 53.909568][ T4446] out_of_memory+0xc78/0xf70 [ 53.910395][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.911387][ T4446] try_charge_memcg+0xa4c/0x1390 [ 53.912256][ T4446] charge_memcg+0xa4/0x1f0 [ 53.913030][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.914190][ T4446] __read_swap_cache_async+0x378/0x688 [ 53.915230][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 53.916189][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 53.917091][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 53.917943][ C0] I/O error, dev loop0, sector 1950 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 53.917982][ T4446] shmem_file_read_iter+0x210/0x954 [ 53.919835][ C0] ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x3cf. [ 53.920727][ T4446] do_iter_read+0x4d4/0x8b4 [ 53.923228][ T4446] vfs_iter_read+0x88/0xac [ 53.923994][ T4446] loop_process_work+0xbf0/0x200c [ 53.924869][ T4446] loop_rootcg_workfn+0x28/0x38 [ 53.925779][ T4446] process_one_work+0x7e4/0x13bc [ 53.926688][ T4446] worker_thread+0x8cc/0xfe8 [ 53.927550][ T4446] kthread+0x254/0x2e0 [ 53.928269][ T4446] ret_from_fork+0x10/0x20 [ 53.929144][ T4446] memory: usage 96kB, limit 96kB, failcnt 82959 [ 53.930143][ T4446] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.931399][ T4446] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.932551][ T4446] Memory cgroup stats for /syz0/test: [ 53.932629][ T4446] anon 0 [ 53.932629][ T4446] file 69632 [ 53.932629][ T4446] kernel 28672 [ 53.932629][ T4446] kernel_stack 0 [ 53.932629][ T4446] pagetables 0 [ 53.932629][ T4446] sec_pagetables 0 [ 53.932629][ T4446] percpu 0 [ 53.932629][ T4446] sock 0 [ 53.932629][ T4446] vmalloc 0 [ 53.932629][ T4446] shmem 40960 [ 53.932629][ T4446] zswap 0 [ 53.932629][ T4446] zswapped 0 [ 53.932629][ T4446] file_mapped 0 [ 53.932629][ T4446] file_dirty 0 [ 53.932629][ T4446] file_writeback 0 [ 53.932629][ T4446] swapcached 12120064 [ 53.932629][ T4446] anon_thp 0 [ 53.932629][ T4446] file_thp 0 [ 53.932629][ T4446] shmem_thp 0 [ 53.932629][ T4446] inactive_anon 32768 [ 53.932629][ T4446] active_anon 8192 [ 53.932629][ T4446] inactive_file 0 [ 53.932629][ T4446] active_file 28672 [ 53.932629][ T4446] unevictable 0 [ 53.932629][ T4446] slab_reclaimable 21632 [ 53.932629][ T4446] slab_unreclaimable 5192 [ 53.932629][ T4446] slab 26824 [ 53.947949][ T4446] Out of memory and no killable processes... [ 53.948977][ C1] I/O error, dev loop0, sector 12 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 53.950511][ C1] Buffer I/O error on dev loop0, logical block 6, async page read [ 53.951393][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 53.954141][ T1618] CPU: 0 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 53.955474][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.957048][ T1618] Workqueue: loop0 loop_workfn [ 53.957812][ T1618] Call trace: [ 53.958390][ T1618] dump_backtrace+0x1c4/0x1f0 [ 53.959227][ T1618] show_stack+0x2c/0x3c [ 53.959995][ T1618] __dump_stack+0x30/0x40 [ 53.960785][ T1618] dump_stack_lvl+0xf4/0x15c [ 53.961620][ T1618] dump_stack+0x1c/0x5c [ 53.962343][ T1618] dump_header+0xc0/0x724 [ 53.963119][ T1618] out_of_memory+0xc78/0xf70 [ 53.963929][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 53.964916][ T1618] try_charge_memcg+0xa4c/0x1390 [ 53.965787][ T1618] charge_memcg+0xa4/0x1f0 [ 53.966547][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 53.967588][ T1618] __read_swap_cache_async+0x378/0x688 [ 53.968451][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 53.969386][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 53.970288][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 53.971179][ T1618] shmem_file_read_iter+0x210/0x954 [ 53.972079][ T1618] do_iter_read+0x4d4/0x8b4 [ 53.972907][ T1618] vfs_iter_read+0x88/0xac [ 53.973678][ T1618] loop_process_work+0xbf0/0x200c [ 53.974606][ T1618] loop_workfn+0x48/0x58 [ 53.975368][ T1618] process_one_work+0x7e4/0x13bc [ 53.976274][ T1618] worker_thread+0x8cc/0xfe8 [ 53.977062][ T1618] kthread+0x254/0x2e0 [ 53.977781][ T1618] ret_from_fork+0x10/0x20 [ 53.979559][ T1618] memory: usage 96kB, limit 96kB, failcnt 82978 [ 53.980614][ T1618] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 53.981875][ T1618] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 53.983026][ T1618] Memory cgroup stats for /syz0/test: [ 53.983095][ T1618] anon 0 [ 53.983095][ T1618] file 69632 [ 53.983095][ T1618] kernel 28672 [ 53.983095][ T1618] kernel_stack 0 [ 53.983095][ T1618] pagetables 0 [ 53.983095][ T1618] sec_pagetables 0 [ 53.983095][ T1618] percpu 0 [ 53.983095][ T1618] sock 0 [ 53.983095][ T1618] vmalloc 0 [ 53.983095][ T1618] shmem 40960 [ 53.983095][ T1618] zswap 0 [ 53.983095][ T1618] zswapped 0 [ 53.983095][ T1618] file_mapped 0 [ 53.983095][ T1618] file_dirty 0 [ 53.983095][ T1618] file_writeback 0 [ 53.983095][ T1618] swapcached 12120064 [ 53.983095][ T1618] anon_thp 0 [ 53.983095][ T1618] file_thp 0 [ 53.983095][ T1618] shmem_thp 0 [ 53.983095][ T1618] inactive_anon 32768 [ 53.983095][ T1618] active_anon 8192 [ 53.983095][ T1618] inactive_file 0 [ 53.983095][ T1618] active_file 28672 [ 53.983095][ T1618] unevictable 0 [ 53.983095][ T1618] slab_reclaimable 21632 [ 53.983095][ T1618] slab_unreclaimable 5192 [ 53.983095][ T1618] slab 26824 [ 53.999481][ T1618] Out of memory and no killable processes... [ 54.000583][ C0] I/O error, dev loop0, sector 1792 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 54.000998][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.002051][ C0] ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x380. [ 54.004127][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 54.006868][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.008421][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 54.009385][ T4446] Call trace: [ 54.009944][ T4446] dump_backtrace+0x1c4/0x1f0 [ 54.010752][ T4446] show_stack+0x2c/0x3c [ 54.011481][ T4446] __dump_stack+0x30/0x40 [ 54.012227][ T4446] dump_stack_lvl+0xf4/0x15c [ 54.013073][ T4446] dump_stack+0x1c/0x5c [ 54.013802][ T4446] dump_header+0xc0/0x724 [ 54.014580][ T4446] out_of_memory+0xc78/0xf70 [ 54.015394][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.016385][ T4446] try_charge_memcg+0xa4c/0x1390 [ 54.017239][ T4446] charge_memcg+0xa4/0x1f0 [ 54.018019][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.019116][ T4446] __read_swap_cache_async+0x378/0x688 [ 54.020140][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 54.021065][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 54.021930][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 54.022858][ T4446] shmem_file_read_iter+0x210/0x954 [ 54.023755][ T4446] do_iter_read+0x4d4/0x8b4 [ 54.024536][ T4446] vfs_iter_read+0x88/0xac [ 54.025272][ T4446] loop_process_work+0xbf0/0x200c [ 54.026149][ T4446] loop_rootcg_workfn+0x28/0x38 [ 54.026992][ T4446] process_one_work+0x7e4/0x13bc [ 54.027842][ T4446] worker_thread+0x8cc/0xfe8 [ 54.028639][ T4446] kthread+0x254/0x2e0 [ 54.029353][ T4446] ret_from_fork+0x10/0x20 [ 54.030290][ T4446] memory: usage 96kB, limit 96kB, failcnt 82997 [ 54.031340][ T4446] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 54.032633][ T4446] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 54.033792][ T4446] Memory cgroup stats for /syz0/test: [ 54.033862][ T4446] anon 0 [ 54.033862][ T4446] file 69632 [ 54.033862][ T4446] kernel 28672 [ 54.033862][ T4446] kernel_stack 0 [ 54.033862][ T4446] pagetables 0 [ 54.033862][ T4446] sec_pagetables 0 [ 54.033862][ T4446] percpu 0 [ 54.033862][ T4446] sock 0 [ 54.033862][ T4446] vmalloc 0 [ 54.033862][ T4446] shmem 40960 [ 54.033862][ T4446] zswap 0 [ 54.033862][ T4446] zswapped 0 [ 54.033862][ T4446] file_mapped 0 [ 54.033862][ T4446] file_dirty 0 [ 54.033862][ T4446] file_writeback 0 [ 54.033862][ T4446] swapcached 12120064 [ 54.033862][ T4446] anon_thp 0 [ 54.033862][ T4446] file_thp 0 [ 54.033862][ T4446] shmem_thp 0 [ 54.033862][ T4446] inactive_anon 32768 [ 54.033862][ T4446] active_anon 8192 [ 54.033862][ T4446] inactive_file 0 [ 54.033862][ T4446] active_file 28672 [ 54.033862][ T4446] unevictable 0 [ 54.033862][ T4446] slab_reclaimable 21632 [ 54.033862][ T4446] slab_unreclaimable 5192 [ 54.033862][ T4446] slab 26824 [ 54.049029][ T4446] Out of memory and no killable processes... [ 54.050093][ C1] I/O error, dev loop0, sector 14 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 54.050309][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.053605][ T1618] CPU: 0 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 54.054779][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.056294][ T1618] Workqueue: loop0 loop_workfn [ 54.057061][ T1618] Call trace: [ 54.057611][ T1618] dump_backtrace+0x1c4/0x1f0 [ 54.058454][ T1618] show_stack+0x2c/0x3c [ 54.059227][ T1618] __dump_stack+0x30/0x40 [ 54.060023][ T1618] dump_stack_lvl+0xf4/0x15c [ 54.060840][ T1618] dump_stack+0x1c/0x5c [ 54.061565][ T1618] dump_header+0xc0/0x724 [ 54.062296][ T1618] out_of_memory+0xc78/0xf70 [ 54.063067][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.063954][ T1618] try_charge_memcg+0xa4c/0x1390 [ 54.064805][ T1618] charge_memcg+0xa4/0x1f0 [ 54.065565][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.066599][ T1618] __read_swap_cache_async+0x378/0x688 [ 54.067606][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 54.068578][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 54.069494][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 54.070377][ T1618] shmem_file_read_iter+0x210/0x954 [ 54.071265][ T1618] do_iter_read+0x4d4/0x8b4 [ 54.072054][ T1618] vfs_iter_read+0x88/0xac [ 54.072872][ T1618] loop_process_work+0xbf0/0x200c [ 54.073905][ T1618] loop_workfn+0x48/0x58 [ 54.074710][ T1618] process_one_work+0x7e4/0x13bc [ 54.075583][ T1618] worker_thread+0x8cc/0xfe8 [ 54.076422][ T1618] kthread+0x254/0x2e0 [ 54.077147][ T1618] ret_from_fork+0x10/0x20 [ 54.079481][ T1618] memory: usage 96kB, limit 96kB, failcnt 83016 [ 54.080629][ T1618] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 54.081885][ T1618] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 54.083019][ T1618] Memory cgroup stats for /syz0/test: [ 54.083084][ T1618] anon 0 [ 54.083084][ T1618] file 69632 [ 54.083084][ T1618] kernel 28672 [ 54.083084][ T1618] kernel_stack 0 [ 54.083084][ T1618] pagetables 0 [ 54.083084][ T1618] sec_pagetables 0 [ 54.083084][ T1618] percpu 0 [ 54.083084][ T1618] sock 0 [ 54.083084][ T1618] vmalloc 0 [ 54.083084][ T1618] shmem 40960 [ 54.083084][ T1618] zswap 0 [ 54.083084][ T1618] zswapped 0 [ 54.083084][ T1618] file_mapped 0 [ 54.083084][ T1618] file_dirty 0 [ 54.083084][ T1618] file_writeback 0 [ 54.083084][ T1618] swapcached 12120064 [ 54.083084][ T1618] anon_thp 0 [ 54.083084][ T1618] file_thp 0 [ 54.083084][ T1618] shmem_thp 0 [ 54.083084][ T1618] inactive_anon 32768 [ 54.083084][ T1618] active_anon 8192 [ 54.083084][ T1618] inactive_file 0 [ 54.083084][ T1618] active_file 28672 [ 54.083084][ T1618] unevictable 0 [ 54.083084][ T1618] slab_reclaimable 21632 [ 54.083084][ T1618] slab_unreclaimable 5192 [ 54.083084][ T1618] slab 26824 [ 54.101439][ T1618] Out of memory and no killable processes... [ 54.102526][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.102568][ C1] ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x381. [ 54.104807][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 54.107961][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.109625][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 54.110565][ T4446] Call trace: [ 54.111141][ T4446] dump_backtrace+0x1c4/0x1f0 [ 54.111969][ T4446] show_stack+0x2c/0x3c [ 54.112710][ T4446] __dump_stack+0x30/0x40 [ 54.113457][ T4446] dump_stack_lvl+0xf4/0x15c [ 54.114256][ T4446] dump_stack+0x1c/0x5c [ 54.114989][ T4446] dump_header+0xc0/0x724 [ 54.115765][ T4446] out_of_memory+0xc78/0xf70 [ 54.116551][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.117549][ T4446] try_charge_memcg+0xa4c/0x1390 [ 54.118425][ T4446] charge_memcg+0xa4/0x1f0 [ 54.119196][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.120280][ T4446] __read_swap_cache_async+0x378/0x688 [ 54.121252][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 54.122199][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 54.123102][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 54.124056][ T4446] shmem_file_read_iter+0x210/0x954 [ 54.125019][ T4446] do_iter_read+0x4d4/0x8b4 [ 54.125856][ T4446] vfs_iter_read+0x88/0xac [ 54.126666][ T4446] loop_process_work+0xbf0/0x200c [ 54.127583][ T4446] loop_rootcg_workfn+0x28/0x38 [ 54.128453][ T4446] process_one_work+0x7e4/0x13bc [ 54.129320][ T4446] worker_thread+0x8cc/0xfe8 [ 54.130118][ T4446] kthread+0x254/0x2e0 [ 54.130878][ T4446] ret_from_fork+0x10/0x20 [ 54.131940][ T4446] memory: usage 96kB, limit 96kB, failcnt 83035 [ 54.132881][ T4446] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 54.134058][ T4446] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 54.135188][ T4446] Memory cgroup stats for /syz0/test: [ 54.135276][ T4446] anon 0 [ 54.135276][ T4446] file 69632 [ 54.135276][ T4446] kernel 28672 [ 54.135276][ T4446] kernel_stack 0 [ 54.135276][ T4446] pagetables 0 [ 54.135276][ T4446] sec_pagetables 0 [ 54.135276][ T4446] percpu 0 [ 54.135276][ T4446] sock 0 [ 54.135276][ T4446] vmalloc 0 [ 54.135276][ T4446] shmem 40960 [ 54.135276][ T4446] zswap 0 [ 54.135276][ T4446] zswapped 0 [ 54.135276][ T4446] file_mapped 0 [ 54.135276][ T4446] file_dirty 0 [ 54.135276][ T4446] file_writeback 0 [ 54.135276][ T4446] swapcached 12120064 [ 54.135276][ T4446] anon_thp 0 [ 54.135276][ T4446] file_thp 0 [ 54.135276][ T4446] shmem_thp 0 [ 54.135276][ T4446] inactive_anon 32768 [ 54.135276][ T4446] active_anon 8192 [ 54.135276][ T4446] inactive_file 0 [ 54.135276][ T4446] active_file 28672 [ 54.135276][ T4446] unevictable 0 [ 54.135276][ T4446] slab_reclaimable 21632 [ 54.135276][ T4446] slab_unreclaimable 5192 [ 54.135276][ T4446] slab 26824 [ 54.150533][ T4446] Out of memory and no killable processes... [ 54.151563][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.153823][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 54.154989][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.156557][ T1618] Workqueue: loop0 loop_workfn [ 54.157318][ T1618] Call trace: [ 54.157843][ T1618] dump_backtrace+0x1c4/0x1f0 [ 54.158703][ T1618] show_stack+0x2c/0x3c [ 54.159442][ T1618] __dump_stack+0x30/0x40 [ 54.160189][ T1618] dump_stack_lvl+0xf4/0x15c [ 54.160983][ T1618] dump_stack+0x1c/0x5c [ 54.161702][ T1618] dump_header+0xc0/0x724 [ 54.162455][ T1618] out_of_memory+0xc78/0xf70 [ 54.163239][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.164238][ T1618] try_charge_memcg+0xa4c/0x1390 [ 54.165152][ T1618] charge_memcg+0xa4/0x1f0 [ 54.165892][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.166905][ T1618] __read_swap_cache_async+0x378/0x688 [ 54.167839][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 54.168745][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 54.169605][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 54.170461][ T1618] shmem_file_read_iter+0x210/0x954 [ 54.171330][ T1618] do_iter_read+0x4d4/0x8b4 [ 54.172140][ T1618] vfs_iter_read+0x88/0xac [ 54.172898][ T1618] loop_process_work+0xbf0/0x200c [ 54.173782][ T1618] loop_workfn+0x48/0x58 [ 54.174520][ T1618] process_one_work+0x7e4/0x13bc [ 54.175374][ T1618] worker_thread+0x8cc/0xfe8 [ 54.176144][ T1618] kthread+0x254/0x2e0 [ 54.176830][ T1618] ret_from_fork+0x10/0x20 [ 54.179849][ T1618] memory: usage 96kB, limit 96kB, failcnt 83054 [ 54.180784][ T1618] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 54.181983][ T1618] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 54.183075][ T1618] Memory cgroup stats for /syz0/test: [ 54.183147][ T1618] anon 0 [ 54.183147][ T1618] file 69632 [ 54.183147][ T1618] kernel 28672 [ 54.183147][ T1618] kernel_stack 0 [ 54.183147][ T1618] pagetables 0 [ 54.183147][ T1618] sec_pagetables 0 [ 54.183147][ T1618] percpu 0 [ 54.183147][ T1618] sock 0 [ 54.183147][ T1618] vmalloc 0 [ 54.183147][ T1618] shmem 40960 [ 54.183147][ T1618] zswap 0 [ 54.183147][ T1618] zswapped 0 [ 54.183147][ T1618] file_mapped 0 [ 54.183147][ T1618] file_dirty 0 [ 54.183147][ T1618] file_writeback 0 [ 54.183147][ T1618] swapcached 12120064 [ 54.183147][ T1618] anon_thp 0 [ 54.183147][ T1618] file_thp 0 [ 54.183147][ T1618] shmem_thp 0 [ 54.183147][ T1618] inactive_anon 32768 [ 54.183147][ T1618] active_anon 8192 [ 54.183147][ T1618] inactive_file 0 [ 54.183147][ T1618] active_file 28672 [ 54.183147][ T1618] unevictable 0 [ 54.183147][ T1618] slab_reclaimable 21632 [ 54.183147][ T1618] slab_unreclaimable 5192 [ 54.183147][ T1618] slab 26824 [ 54.199475][ T1618] Out of memory and no killable processes... [ 54.200488][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.200534][ C1] ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x382. [ 54.203069][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 54.206034][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.207703][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 54.208668][ T4446] Call trace: [ 54.209270][ T4446] dump_backtrace+0x1c4/0x1f0 [ 54.210099][ T4446] show_stack+0x2c/0x3c [ 54.210848][ T4446] __dump_stack+0x30/0x40 [ 54.211650][ T4446] dump_stack_lvl+0xf4/0x15c [ 54.212530][ T4446] dump_stack+0x1c/0x5c [ 54.213322][ T4446] dump_header+0xc0/0x724 [ 54.214140][ T4446] out_of_memory+0xc78/0xf70 [ 54.215005][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.215992][ T4446] try_charge_memcg+0xa4c/0x1390 [ 54.216909][ T4446] charge_memcg+0xa4/0x1f0 [ 54.217734][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.218841][ T4446] __read_swap_cache_async+0x378/0x688 [ 54.219797][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 54.220733][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 54.221659][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 54.222576][ T4446] shmem_file_read_iter+0x210/0x954 [ 54.223477][ T4446] do_iter_read+0x4d4/0x8b4 [ 54.224277][ T4446] vfs_iter_read+0x88/0xac [ 54.225107][ T4446] loop_process_work+0xbf0/0x200c [ 54.226009][ T4446] loop_rootcg_workfn+0x28/0x38 [ 54.226895][ T4446] process_one_work+0x7e4/0x13bc [ 54.227753][ T4446] worker_thread+0x8cc/0xfe8 [ 54.228530][ T4446] kthread+0x254/0x2e0 [ 54.229227][ T4446] ret_from_fork+0x10/0x20 [ 54.231136][ T4446] memory: usage 96kB, limit 96kB, failcnt 83073 [ 54.232246][ T4446] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 54.233701][ T4446] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 54.234920][ T4446] Memory cgroup stats for /syz0/test: [ 54.234986][ T4446] anon 0 [ 54.234986][ T4446] file 69632 [ 54.234986][ T4446] kernel 28672 [ 54.234986][ T4446] kernel_stack 0 [ 54.234986][ T4446] pagetables 0 [ 54.234986][ T4446] sec_pagetables 0 [ 54.234986][ T4446] percpu 0 [ 54.234986][ T4446] sock 0 [ 54.234986][ T4446] vmalloc 0 [ 54.234986][ T4446] shmem 40960 [ 54.234986][ T4446] zswap 0 [ 54.234986][ T4446] zswapped 0 [ 54.234986][ T4446] file_mapped 0 [ 54.234986][ T4446] file_dirty 0 [ 54.234986][ T4446] file_writeback 0 [ 54.234986][ T4446] swapcached 12120064 [ 54.234986][ T4446] anon_thp 0 [ 54.234986][ T4446] file_thp 0 [ 54.234986][ T4446] shmem_thp 0 [ 54.234986][ T4446] inactive_anon 32768 [ 54.234986][ T4446] active_anon 8192 [ 54.234986][ T4446] inactive_file 0 [ 54.234986][ T4446] active_file 28672 [ 54.234986][ T4446] unevictable 0 [ 54.234986][ T4446] slab_reclaimable 21632 [ 54.234986][ T4446] slab_unreclaimable 5192 [ 54.234986][ T4446] slab 26824 [ 54.252008][ T4446] Out of memory and no killable processes... [ 54.253127][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.255249][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 54.256416][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.257929][ T1618] Workqueue: loop0 loop_workfn [ 54.258800][ T1618] Call trace: [ 54.259374][ T1618] dump_backtrace+0x1c4/0x1f0 [ 54.260227][ T1618] show_stack+0x2c/0x3c [ 54.261016][ T1618] __dump_stack+0x30/0x40 [ 54.261819][ T1618] dump_stack_lvl+0xf4/0x15c [ 54.262630][ T1618] dump_stack+0x1c/0x5c [ 54.263352][ T1618] dump_header+0xc0/0x724 [ 54.264120][ T1618] out_of_memory+0xc78/0xf70 [ 54.265056][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.266187][ T1618] try_charge_memcg+0xa4c/0x1390 [ 54.267107][ T1618] charge_memcg+0xa4/0x1f0 [ 54.267915][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.269039][ T1618] __read_swap_cache_async+0x378/0x688 [ 54.270053][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 54.271040][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 54.271972][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 54.272926][ T1618] shmem_file_read_iter+0x210/0x954 [ 54.273881][ T1618] do_iter_read+0x4d4/0x8b4 [ 54.274706][ T1618] vfs_iter_read+0x88/0xac [ 54.275530][ T1618] loop_process_work+0xbf0/0x200c [ 54.276458][ T1618] loop_workfn+0x48/0x58 [ 54.277227][ T1618] process_one_work+0x7e4/0x13bc [ 54.278106][ T1618] worker_thread+0x8cc/0xfe8 [ 54.278875][ T1618] kthread+0x254/0x2e0 [ 54.279582][ T1618] ret_from_fork+0x10/0x20 [ 54.280502][ T1618] memory: usage 96kB, limit 96kB, failcnt 83092 [ 54.281922][ T1618] memory+swap: usage 2440kB, limit 9007199254740988kB, failcnt 0 [ 54.283417][ T1618] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 54.284716][ T1618] Memory cgroup stats for /syz0/test: [ 54.284770][ T1618] anon 0 [ 54.284770][ T1618] file 69632 [ 54.284770][ T1618] kernel 28672 [ 54.284770][ T1618] kernel_stack 0 [ 54.284770][ T1618] pagetables 0 [ 54.284770][ T1618] sec_pagetables 0 [ 54.284770][ T1618] percpu 0 [ 54.284770][ T1618] sock 0 [ 54.284770][ T1618] vmalloc 0 [ 54.284770][ T1618] shmem 40960 [ 54.284770][ T1618] zswap 0 [ 54.284770][ T1618] zswapped 0 [ 54.284770][ T1618] file_mapped 0 [ 54.284770][ T1618] file_dirty 0 [ 54.284770][ T1618] file_writeback 0 [ 54.284770][ T1618] swapcached 12120064 [ 54.284770][ T1618] anon_thp 0 [ 54.284770][ T1618] file_thp 0 1970/01/01 00:00:54 executed programs: 5 [ 54.284770][ T1618] shmem_thp 0 [ 54.284770][ T1618] inactive_anon 32768 [ 54.284770][ T1618] active_anon 8192 [ 54.284770][ T1618] inactive_file 0 [ 54.284770][ T1618] active_file 28672 [ 54.284770][ T1618] unevictable 0 [ 54.284770][ T1618] slab_reclaimable 21632 [ 54.284770][ T1618] slab_unreclaimable 5192 [ 54.284770][ T1618] slab 26824 [ 54.303546][ T1618] Out of memory and no killable processes... [ 54.308102][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.310219][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 54.311410][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.312497][ C1] ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x383. [ 54.312905][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 54.315577][ T4446] Call trace: [ 54.316112][ T4446] dump_backtrace+0x1c4/0x1f0 [ 54.316891][ T4446] show_stack+0x2c/0x3c [ 54.317577][ T4446] __dump_stack+0x30/0x40 [ 54.318318][ T4446] dump_stack_lvl+0xf4/0x15c [ 54.319091][ T4446] dump_stack+0x1c/0x5c [ 54.319846][ T4446] dump_header+0xc0/0x724 [ 54.320651][ T4446] out_of_memory+0xc78/0xf70 [ 54.321509][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.322576][ T4446] try_charge_memcg+0xa4c/0x1390 [ 54.322724][ T4510] ntfs: (device loop0): load_and_init_upcase(): Failed to load $UpCase from the volume. Using default. [ 54.323495][ T4446] charge_memcg+0xa4/0x1f0 [ 54.325974][ T4510] ntfs: (device loop0): map_mft_record(): Failed with error code 4. [ 54.326356][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.328646][ T4446] __read_swap_cache_async+0x378/0x688 [ 54.329554][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 54.330494][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 54.331399][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 54.332349][ T4446] shmem_file_read_iter+0x210/0x954 [ 54.333263][ T4446] do_iter_read+0x4d4/0x8b4 [ 54.334091][ T4446] vfs_iter_read+0x88/0xac [ 54.334900][ T4446] loop_process_work+0xbf0/0x200c [ 54.335838][ T4446] loop_rootcg_workfn+0x28/0x38 [ 54.336681][ T4446] process_one_work+0x7e4/0x13bc [ 54.337537][ T4446] worker_thread+0x8cc/0xfe8 [ 54.338365][ T4446] kthread+0x254/0x2e0 [ 54.339066][ T4446] ret_from_fork+0x10/0x20 [ 54.345426][ T4446] memory: usage 76kB, limit 96kB, failcnt 83095 [ 54.346654][ T4446] memory+swap: usage 2420kB, limit 9007199254740988kB, failcnt 0 [ 54.348603][ T4446] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 54.349879][ T4446] Memory cgroup stats for /syz0/test: [ 54.349969][ T4446] anon 0 [ 54.349969][ T4446] file 45056 [ 54.349969][ T4446] kernel 28672 [ 54.349969][ T4446] kernel_stack 0 [ 54.349969][ T4446] pagetables 0 [ 54.349969][ T4446] sec_pagetables 0 [ 54.349969][ T4446] percpu 0 [ 54.349969][ T4446] sock 0 [ 54.349969][ T4446] vmalloc 0 [ 54.349969][ T4446] shmem 40960 [ 54.349969][ T4446] zswap 0 [ 54.349969][ T4446] zswapped 0 [ 54.349969][ T4446] file_mapped 0 [ 54.349969][ T4446] file_dirty 0 [ 54.349969][ T4446] file_writeback 0 [ 54.349969][ T4446] swapcached 12120064 [ 54.349969][ T4446] anon_thp 0 [ 54.349969][ T4446] file_thp 0 [ 54.349969][ T4446] shmem_thp 0 [ 54.349969][ T4446] inactive_anon 32768 [ 54.349969][ T4446] active_anon 8192 [ 54.349969][ T4446] inactive_file 4096 [ 54.349969][ T4446] active_file 4096 [ 54.349969][ T4446] unevictable 0 [ 54.349969][ T4446] slab_reclaimable 21832 [ 54.349969][ T4446] slab_unreclaimable 3896 [ 54.349969][ T4446] slab 25728 [ 54.370320][ T4446] Out of memory and no killable processes... [ 54.456233][ T4511] loop0: detected capacity change from 0 to 4096 [ 54.466015][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.468940][ T1618] CPU: 0 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 54.470118][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.471961][ T1618] Workqueue: loop0 loop_workfn [ 54.472825][ T1618] Call trace: [ 54.473416][ T1618] dump_backtrace+0x1c4/0x1f0 [ 54.474229][ T1618] show_stack+0x2c/0x3c [ 54.474969][ T1618] __dump_stack+0x30/0x40 [ 54.475729][ T1618] dump_stack_lvl+0xf4/0x15c [ 54.476534][ T1618] dump_stack+0x1c/0x5c [ 54.477252][ T1618] dump_header+0xc0/0x724 [ 54.477997][ T1618] oom_kill_process+0x35c/0x660 [ 54.478912][ T1618] out_of_memory+0xbf0/0xf70 [ 54.479782][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.480824][ T1618] try_charge_memcg+0xa4c/0x1390 [ 54.481736][ T1618] charge_memcg+0xa4/0x1f0 [ 54.482545][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.483648][ T1618] __read_swap_cache_async+0x378/0x688 [ 54.484636][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 54.485618][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 54.486537][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 54.487485][ T1618] shmem_file_read_iter+0x210/0x954 [ 54.488414][ T1618] do_iter_read+0x4d4/0x8b4 [ 54.489218][ T1618] vfs_iter_read+0x88/0xac [ 54.490014][ T1618] loop_process_work+0xbf0/0x200c [ 54.490951][ T1618] loop_workfn+0x48/0x58 [ 54.491728][ T1618] process_one_work+0x7e4/0x13bc [ 54.492611][ T1618] worker_thread+0x8cc/0xfe8 [ 54.493430][ T1618] kthread+0x254/0x2e0 [ 54.494155][ T1618] ret_from_fork+0x10/0x20 [ 54.496304][ T1618] memory: usage 96kB, limit 96kB, failcnt 84163 [ 54.497321][ T1618] memory+swap: usage 2576kB, limit 9007199254740988kB, failcnt 0 [ 54.498709][ T1618] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 54.499834][ T1618] Memory cgroup stats for /syz0/test: [ 54.499928][ T1618] anon 4096 [ 54.499928][ T1618] file 57344 [ 54.499928][ T1618] kernel 24576 [ 54.499928][ T1618] kernel_stack 0 [ 54.499928][ T1618] pagetables 0 [ 54.499928][ T1618] sec_pagetables 0 [ 54.499928][ T1618] percpu 0 [ 54.499928][ T1618] sock 0 [ 54.499928][ T1618] vmalloc 0 [ 54.499928][ T1618] shmem 45056 [ 54.499928][ T1618] zswap 0 [ 54.499928][ T1618] zswapped 0 [ 54.499928][ T1618] file_mapped 0 [ 54.499928][ T1618] file_dirty 0 [ 54.499928][ T1618] file_writeback 0 [ 54.499928][ T1618] swapcached 15962112 [ 54.499928][ T1618] anon_thp 0 [ 54.499928][ T1618] file_thp 0 [ 54.499928][ T1618] shmem_thp 0 [ 54.499928][ T1618] inactive_anon 28672 [ 54.499928][ T1618] active_anon 24576 [ 54.499928][ T1618] inactive_file 0 [ 54.499928][ T1618] active_file 12288 [ 54.499928][ T1618] unevictable 0 [ 54.499928][ T1618] slab_reclaimable 15472 [ 54.499928][ T1618] slab_unreclaimable 5840 [ 54.499928][ T1618] slab 21312 [ 54.518477][ T1618] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.20,pid=4511,uid=0 [ 54.521473][ T1618] Memory cgroup out of memory: Killed process 4511 (syz.0.20) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 54.530620][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.532981][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 54.534308][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.536187][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 54.537178][ T4446] Call trace: [ 54.537798][ T4446] dump_backtrace+0x1c4/0x1f0 [ 54.538692][ T4446] show_stack+0x2c/0x3c [ 54.539481][ T4446] __dump_stack+0x30/0x40 [ 54.540250][ T4446] dump_stack_lvl+0xf4/0x15c [ 54.541106][ T4446] dump_stack+0x1c/0x5c [ 54.541906][ T4446] dump_header+0xc0/0x724 [ 54.542729][ T4446] out_of_memory+0xc78/0xf70 [ 54.543577][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.544626][ T4446] try_charge_memcg+0xa4c/0x1390 [ 54.545559][ T4446] charge_memcg+0xa4/0x1f0 [ 54.546413][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.547556][ T4446] __read_swap_cache_async+0x378/0x688 [ 54.548569][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 54.549601][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 54.550551][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 54.551509][ T4446] shmem_file_read_iter+0x210/0x954 [ 54.552470][ T4446] do_iter_read+0x4d4/0x8b4 [ 54.553272][ T4446] vfs_iter_read+0x88/0xac [ 54.554066][ T4446] loop_process_work+0xbf0/0x200c [ 54.554982][ T4446] loop_rootcg_workfn+0x28/0x38 [ 54.555883][ T4446] process_one_work+0x7e4/0x13bc [ 54.556786][ T4446] worker_thread+0x8cc/0xfe8 [ 54.557613][ T4446] kthread+0x254/0x2e0 [ 54.558453][ T4446] ret_from_fork+0x10/0x20 [ 54.560748][ T4446] memory: usage 96kB, limit 96kB, failcnt 84264 [ 54.561783][ T4446] memory+swap: usage 2336kB, limit 9007199254740988kB, failcnt 0 [ 54.563043][ T4446] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 54.564203][ T4446] Memory cgroup stats for /syz0/test: [ 54.564287][ T4446] anon 0 [ 54.564287][ T4446] file 65536 [ 54.564287][ T4446] kernel 24576 [ 54.564287][ T4446] kernel_stack 0 [ 54.564287][ T4446] pagetables 0 [ 54.564287][ T4446] sec_pagetables 0 [ 54.564287][ T4446] percpu 0 [ 54.564287][ T4446] sock 0 [ 54.564287][ T4446] vmalloc 0 [ 54.564287][ T4446] shmem 61440 [ 54.564287][ T4446] zswap 0 [ 54.564287][ T4446] zswapped 0 [ 54.564287][ T4446] file_mapped 0 [ 54.564287][ T4446] file_dirty 0 [ 54.564287][ T4446] file_writeback 0 [ 54.564287][ T4446] swapcached 15953920 [ 54.564287][ T4446] anon_thp 0 [ 54.564287][ T4446] file_thp 0 [ 54.564287][ T4446] shmem_thp 0 [ 54.564287][ T4446] inactive_anon 28672 [ 54.564287][ T4446] active_anon 32768 [ 54.564287][ T4446] inactive_file 0 [ 54.564287][ T4446] active_file 12288 [ 54.564287][ T4446] unevictable 0 [ 54.564287][ T4446] slab_reclaimable 18552 [ 54.564287][ T4446] slab_unreclaimable 3896 [ 54.564287][ T4446] slab 22448 [ 54.581652][ T4446] Out of memory and no killable processes... [ 54.584944][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.587183][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 54.588529][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.590342][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 54.591385][ T4446] Call trace: [ 54.592018][ T4446] dump_backtrace+0x1c4/0x1f0 [ 54.592922][ T4446] show_stack+0x2c/0x3c [ 54.593698][ T4446] __dump_stack+0x30/0x40 [ 54.594492][ T4446] dump_stack_lvl+0xf4/0x15c [ 54.595311][ T4446] dump_stack+0x1c/0x5c [ 54.596093][ T4446] dump_header+0xc0/0x724 [ 54.596896][ T4446] out_of_memory+0xc78/0xf70 [ 54.597724][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.598754][ T4446] try_charge_memcg+0xa4c/0x1390 [ 54.599652][ T4446] charge_memcg+0xa4/0x1f0 [ 54.600435][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.601526][ T4446] __read_swap_cache_async+0x378/0x688 [ 54.602541][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 54.603576][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 54.604546][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 54.605547][ T4446] shmem_file_read_iter+0x210/0x954 [ 54.606536][ T4446] do_iter_read+0x4d4/0x8b4 [ 54.607384][ T4446] vfs_iter_read+0x88/0xac [ 54.608208][ T4446] loop_process_work+0xbf0/0x200c [ 54.609132][ T4446] loop_rootcg_workfn+0x28/0x38 [ 54.610169][ T4446] process_one_work+0x7e4/0x13bc [ 54.611163][ T4446] worker_thread+0x8cc/0xfe8 [ 54.612072][ T4446] kthread+0x254/0x2e0 [ 54.612861][ T4446] ret_from_fork+0x10/0x20 [ 54.615163][ T4446] memory: usage 96kB, limit 96kB, failcnt 84283 [ 54.616300][ T4446] memory+swap: usage 2336kB, limit 9007199254740988kB, failcnt 0 [ 54.617676][ T4446] kmem: usage 20kB, limit 9007199254740988kB, failcnt 0 [ 54.619275][ T4446] Memory cgroup stats for /syz0/test: [ 54.619342][ T4446] anon 0 [ 54.619342][ T4446] file 65536 [ 54.619342][ T4446] kernel 20480 [ 54.619342][ T4446] kernel_stack 0 [ 54.619342][ T4446] pagetables 0 [ 54.619342][ T4446] sec_pagetables 0 [ 54.619342][ T4446] percpu 0 [ 54.619342][ T4446] sock 0 [ 54.619342][ T4446] vmalloc 0 [ 54.619342][ T4446] shmem 61440 [ 54.619342][ T4446] zswap 0 [ 54.619342][ T4446] zswapped 0 [ 54.619342][ T4446] file_mapped 0 [ 54.619342][ T4446] file_dirty 0 [ 54.619342][ T4446] file_writeback 0 [ 54.619342][ T4446] swapcached 15953920 [ 54.619342][ T4446] anon_thp 0 [ 54.619342][ T4446] file_thp 0 [ 54.619342][ T4446] shmem_thp 0 [ 54.619342][ T4446] inactive_anon 28672 [ 54.619342][ T4446] active_anon 32768 [ 54.619342][ T4446] inactive_file 0 [ 54.619342][ T4446] active_file 12288 [ 54.619342][ T4446] unevictable 0 [ 54.619342][ T4446] slab_reclaimable 18552 [ 54.619342][ T4446] slab_unreclaimable 3896 [ 54.619342][ T4446] slab 22448 [ 54.636022][ T4446] Out of memory and no killable processes... [ 54.710757][ T4512] loop0: detected capacity change from 0 to 4096 [ 54.714358][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.716537][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 54.717748][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.719578][ T11] Workqueue: loop0 loop_workfn [ 54.720441][ T11] Call trace: [ 54.721029][ T11] dump_backtrace+0x1c4/0x1f0 [ 54.721883][ T11] show_stack+0x2c/0x3c [ 54.722647][ T11] __dump_stack+0x30/0x40 [ 54.723442][ T11] dump_stack_lvl+0xf4/0x15c [ 54.724298][ T11] dump_stack+0x1c/0x5c [ 54.725055][ T11] dump_header+0xc0/0x724 [ 54.725855][ T11] oom_kill_process+0x35c/0x660 [ 54.726765][ T11] out_of_memory+0xbf0/0xf70 [ 54.727586][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.728572][ T11] try_charge_memcg+0xa4c/0x1390 [ 54.729445][ T11] charge_memcg+0xa4/0x1f0 [ 54.730277][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.731388][ T11] __read_swap_cache_async+0x378/0x688 [ 54.732375][ T11] swap_cluster_readahead+0x6c0/0x818 [ 54.733308][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 54.734205][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 54.735125][ T11] shmem_file_read_iter+0x210/0x954 [ 54.736022][ T11] do_iter_read+0x4d4/0x8b4 [ 54.736821][ T11] vfs_iter_read+0x88/0xac [ 54.737599][ T11] loop_process_work+0xbf0/0x200c [ 54.738459][ T11] loop_workfn+0x48/0x58 [ 54.739207][ T11] process_one_work+0x7e4/0x13bc [ 54.740078][ T11] worker_thread+0x8cc/0xfe8 [ 54.740892][ T11] kthread+0x254/0x2e0 [ 54.741582][ T11] ret_from_fork+0x10/0x20 [ 54.747606][ T11] memory: usage 96kB, limit 96kB, failcnt 85356 [ 54.748841][ T11] memory+swap: usage 2596kB, limit 9007199254740988kB, failcnt 0 [ 54.750166][ T11] kmem: usage 36kB, limit 9007199254740988kB, failcnt 0 [ 54.751320][ T11] Memory cgroup stats for /syz0/test: [ 54.751418][ T11] anon 4096 [ 54.751418][ T11] file 49152 [ 54.751418][ T11] kernel 36864 [ 54.751418][ T11] kernel_stack 0 [ 54.751418][ T11] pagetables 0 [ 54.751418][ T11] sec_pagetables 0 [ 54.751418][ T11] percpu 0 [ 54.751418][ T11] sock 0 [ 54.751418][ T11] vmalloc 0 [ 54.751418][ T11] shmem 32768 [ 54.751418][ T11] zswap 0 [ 54.751418][ T11] zswapped 0 [ 54.751418][ T11] file_mapped 0 [ 54.751418][ T11] file_dirty 0 [ 54.751418][ T11] file_writeback 0 [ 54.751418][ T11] swapcached 19980288 [ 54.751418][ T11] anon_thp 0 [ 54.751418][ T11] file_thp 0 [ 54.751418][ T11] shmem_thp 0 [ 54.751418][ T11] inactive_anon 32768 [ 54.751418][ T11] active_anon 12288 [ 54.751418][ T11] inactive_file 0 [ 54.751418][ T11] active_file 0 [ 54.751418][ T11] unevictable 0 [ 54.751418][ T11] slab_reclaimable 16680 [ 54.751418][ T11] slab_unreclaimable 5840 [ 54.751418][ T11] slab 22520 [ 54.767371][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.21,pid=4512,uid=0 [ 54.770156][ T11] Memory cgroup out of memory: Killed process 4512 (syz.0.21) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 54.778128][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.780295][ T1618] CPU: 0 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 54.781541][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.783132][ T1618] Workqueue: loop0 loop_rootcg_workfn [ 54.784118][ T1618] Call trace: [ 54.784739][ T1618] dump_backtrace+0x1c4/0x1f0 [ 54.785605][ T1618] show_stack+0x2c/0x3c [ 54.786362][ T1618] __dump_stack+0x30/0x40 [ 54.787178][ T1618] dump_stack_lvl+0xf4/0x15c [ 54.787948][ T1618] dump_stack+0x1c/0x5c [ 54.788722][ T1618] dump_header+0xc0/0x724 [ 54.789531][ T1618] out_of_memory+0xc78/0xf70 [ 54.790315][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.791309][ T1618] try_charge_memcg+0xa4c/0x1390 [ 54.792223][ T1618] charge_memcg+0xa4/0x1f0 [ 54.793077][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.794162][ T1618] __read_swap_cache_async+0x378/0x688 [ 54.795127][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 54.796155][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 54.797026][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 54.797941][ T1618] shmem_file_read_iter+0x210/0x954 [ 54.798912][ T1618] do_iter_read+0x4d4/0x8b4 [ 54.799727][ T1618] vfs_iter_read+0x88/0xac [ 54.800541][ T1618] loop_process_work+0xbf0/0x200c [ 54.801388][ T1618] loop_rootcg_workfn+0x28/0x38 [ 54.802235][ T1618] process_one_work+0x7e4/0x13bc [ 54.803177][ T1618] worker_thread+0x8cc/0xfe8 [ 54.803973][ T1618] kthread+0x254/0x2e0 [ 54.804686][ T1618] ret_from_fork+0x10/0x20 [ 54.805975][ T1618] memory: usage 96kB, limit 96kB, failcnt 85406 [ 54.807036][ T1618] memory+swap: usage 2336kB, limit 9007199254740988kB, failcnt 0 [ 54.808409][ T1618] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 54.809559][ T1618] Memory cgroup stats for /syz0/test: [ 54.809637][ T1618] anon 0 [ 54.809637][ T1618] file 65536 [ 54.809637][ T1618] kernel 24576 [ 54.809637][ T1618] kernel_stack 0 [ 54.809637][ T1618] pagetables 0 [ 54.809637][ T1618] sec_pagetables 0 [ 54.809637][ T1618] percpu 0 [ 54.809637][ T1618] sock 0 [ 54.809637][ T1618] vmalloc 0 [ 54.809637][ T1618] shmem 61440 [ 54.809637][ T1618] zswap 0 [ 54.809637][ T1618] zswapped 0 [ 54.809637][ T1618] file_mapped 0 [ 54.809637][ T1618] file_dirty 0 [ 54.809637][ T1618] file_writeback 0 [ 54.809637][ T1618] swapcached 19968000 [ 54.809637][ T1618] anon_thp 0 [ 54.809637][ T1618] file_thp 0 [ 54.809637][ T1618] shmem_thp 0 [ 54.809637][ T1618] inactive_anon 32768 [ 54.809637][ T1618] active_anon 28672 [ 54.809637][ T1618] inactive_file 0 [ 54.809637][ T1618] active_file 12288 [ 54.809637][ T1618] unevictable 0 [ 54.809637][ T1618] slab_reclaimable 17840 [ 54.809637][ T1618] slab_unreclaimable 3896 [ 54.809637][ T1618] slab 21736 [ 54.827380][ T1618] Out of memory and no killable processes... [ 54.837044][ T1618] kworker/u4:4 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 54.839841][ T1618] CPU: 1 PID: 1618 Comm: kworker/u4:4 Not tainted syzkaller #0 [ 54.841229][ T1618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.842830][ T1618] Workqueue: loop0 loop_rootcg_workfn [ 54.843756][ T1618] Call trace: [ 54.844295][ T1618] dump_backtrace+0x1c4/0x1f0 [ 54.845035][ T1618] show_stack+0x2c/0x3c [ 54.845709][ T1618] __dump_stack+0x30/0x40 [ 54.846396][ T1618] dump_stack_lvl+0xf4/0x15c [ 54.847144][ T1618] dump_stack+0x1c/0x5c [ 54.847802][ T1618] dump_header+0xc0/0x724 [ 54.848577][ T1618] oom_kill_process+0x35c/0x660 [ 54.849480][ T1618] out_of_memory+0xbf0/0xf70 [ 54.850322][ T1618] mem_cgroup_out_of_memory+0x228/0x2d0 [ 54.851338][ T1618] try_charge_memcg+0xa4c/0x1390 [ 54.852190][ T1618] charge_memcg+0xa4/0x1f0 [ 54.852970][ T1618] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 54.854061][ T1618] __read_swap_cache_async+0x378/0x688 [ 54.855059][ T1618] swap_cluster_readahead+0x6c0/0x818 [ 54.856059][ T1618] shmem_swapin_folio+0x5c4/0x1170 [ 54.856993][ T1618] shmem_get_folio_gfp+0x274/0x2038 [ 54.857974][ T1618] shmem_file_read_iter+0x210/0x954 [ 54.858877][ T1618] do_iter_read+0x4d4/0x8b4 [ 54.859733][ T1618] vfs_iter_read+0x88/0xac [ 54.860574][ T1618] loop_process_work+0xbf0/0x200c [ 54.861531][ T1618] loop_rootcg_workfn+0x28/0x38 [ 54.862456][ T1618] process_one_work+0x7e4/0x13bc [ 54.863403][ T1618] worker_thread+0x8cc/0xfe8 [ 54.864192][ T1618] kthread+0x254/0x2e0 [ 54.864931][ T1618] ret_from_fork+0x10/0x20 [ 54.871943][ T1618] memory: usage 72kB, limit 96kB, failcnt 85520 [ 54.873430][ T1618] memory+swap: usage 2576kB, limit 9007199254740988kB, failcnt 0 [ 54.875602][ T1618] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 54.877135][ T1618] Memory cgroup stats for /syz0/test: [ 54.877202][ T1618] anon 16384 [ 54.877202][ T1618] file 4096 [ 54.877202][ T1618] kernel 24576 [ 54.877202][ T1618] kernel_stack 0 [ 54.877202][ T1618] pagetables 8192 [ 54.877202][ T1618] sec_pagetables 0 [ 54.877202][ T1618] percpu 0 [ 54.877202][ T1618] sock 0 [ 54.877202][ T1618] vmalloc 0 [ 54.877202][ T1618] shmem 0 [ 54.877202][ T1618] zswap 0 [ 54.877202][ T1618] zswapped 0 [ 54.877202][ T1618] file_mapped 0 [ 54.877202][ T1618] file_dirty 0 [ 54.877202][ T1618] file_writeback 0 [ 54.877202][ T1618] swapcached 20410368 [ 54.877202][ T1618] anon_thp 0 [ 54.877202][ T1618] file_thp 0 [ 54.877202][ T1618] shmem_thp 0 [ 54.877202][ T1618] inactive_anon 0 [ 54.877202][ T1618] active_anon 45056 [ 54.877202][ T1618] inactive_file 0 [ 54.877202][ T1618] active_file 4096 [ 54.877202][ T1618] unevictable 0 [ 54.877202][ T1618] slab_reclaimable 8848 [ 54.877202][ T1618] slab_unreclaimable 5168 [ 54.877202][ T1618] slab 14016 [ 54.894359][ T1618] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.22,pid=4513,uid=0 [ 54.896829][ T1618] Memory cgroup out of memory: Killed process 4513 (syz.0.22) total-vm:180036kB, anon-rss:1148kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:80kB oom_score_adj:1000 [ 55.023145][ T4514] loop0: detected capacity change from 0 to 4096 [ 55.035136][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 55.037565][ T11] CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 55.038923][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.040791][ T11] Workqueue: loop0 loop_workfn [ 55.041682][ T11] Call trace: [ 55.042255][ T11] dump_backtrace+0x1c4/0x1f0 [ 55.043081][ T11] show_stack+0x2c/0x3c [ 55.043805][ T11] __dump_stack+0x30/0x40 [ 55.044622][ T11] dump_stack_lvl+0xf4/0x15c [ 55.045429][ T11] dump_stack+0x1c/0x5c [ 55.046163][ T11] dump_header+0xc0/0x724 [ 55.046908][ T11] oom_kill_process+0x35c/0x660 [ 55.047753][ T11] out_of_memory+0xbf0/0xf70 [ 55.048559][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 55.049543][ T11] try_charge_memcg+0xa4c/0x1390 [ 55.050374][ T11] charge_memcg+0xa4/0x1f0 [ 55.051167][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 55.052265][ T11] __read_swap_cache_async+0x378/0x688 [ 55.053276][ T11] swap_cluster_readahead+0x6c0/0x818 [ 55.054184][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 55.055078][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 55.055940][ T11] shmem_file_read_iter+0x210/0x954 [ 55.056804][ T11] do_iter_read+0x4d4/0x8b4 [ 55.057565][ T11] vfs_iter_read+0x88/0xac [ 55.058318][ T11] loop_process_work+0xbf0/0x200c [ 55.059198][ T11] loop_workfn+0x48/0x58 [ 55.059956][ T11] process_one_work+0x7e4/0x13bc [ 55.060825][ T11] worker_thread+0x8cc/0xfe8 [ 55.061628][ T11] kthread+0x254/0x2e0 [ 55.062351][ T11] ret_from_fork+0x10/0x20 [ 55.066187][ T11] memory: usage 96kB, limit 96kB, failcnt 86784 [ 55.067239][ T11] memory+swap: usage 2460kB, limit 9007199254740988kB, failcnt 0 [ 55.068696][ T11] kmem: usage 36kB, limit 9007199254740988kB, failcnt 0 [ 55.069876][ T11] Memory cgroup stats for /syz0/test: [ 55.069977][ T11] anon 0 [ 55.069977][ T11] file 61440 [ 55.069977][ T11] kernel 36864 [ 55.069977][ T11] kernel_stack 0 [ 55.069977][ T11] pagetables 0 [ 55.069977][ T11] sec_pagetables 0 [ 55.069977][ T11] percpu 0 [ 55.069977][ T11] sock 0 [ 55.069977][ T11] vmalloc 0 [ 55.069977][ T11] shmem 32768 [ 55.069977][ T11] zswap 0 [ 55.069977][ T11] zswapped 0 [ 55.069977][ T11] file_mapped 0 [ 55.069977][ T11] file_dirty 0 [ 55.069977][ T11] file_writeback 0 [ 55.069977][ T11] swapcached 24727552 [ 55.069977][ T11] anon_thp 0 [ 55.069977][ T11] file_thp 0 [ 55.069977][ T11] shmem_thp 0 [ 55.069977][ T11] inactive_anon 32768 [ 55.069977][ T11] active_anon 0 [ 55.069977][ T11] inactive_file 0 [ 55.069977][ T11] active_file 8192 [ 55.069977][ T11] unevictable 0 [ 55.069977][ T11] slab_reclaimable 20736 [ 55.069977][ T11] slab_unreclaimable 5840 [ 55.069977][ T11] slab 26576 [ 55.087210][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.23,pid=4514,uid=0 [ 55.090281][ T11] Memory cgroup out of memory: Killed process 4514 (syz.0.23) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 55.098546][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 55.101169][ T11] CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 55.102536][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.104208][ T11] Workqueue: loop0 loop_rootcg_workfn [ 55.105109][ T11] Call trace: [ 55.105697][ T11] dump_backtrace+0x1c4/0x1f0 [ 55.106516][ T11] show_stack+0x2c/0x3c [ 55.107188][ T11] __dump_stack+0x30/0x40 [ 55.107910][ T11] dump_stack_lvl+0xf4/0x15c [ 55.108753][ T11] dump_stack+0x1c/0x5c [ 55.109484][ T11] dump_header+0xc0/0x724 [ 55.110254][ T11] out_of_memory+0xc78/0xf70 [ 55.111029][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 55.111969][ T11] try_charge_memcg+0xa4c/0x1390 [ 55.112816][ T11] charge_memcg+0xa4/0x1f0 [ 55.113608][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 55.114709][ T11] __read_swap_cache_async+0x378/0x688 [ 55.115697][ T11] swap_cluster_readahead+0x6c0/0x818 [ 55.116692][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 55.117636][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 55.118561][ T11] shmem_file_read_iter+0x210/0x954 [ 55.119523][ T11] do_iter_read+0x4d4/0x8b4 [ 55.120333][ T11] vfs_iter_read+0x88/0xac [ 55.121139][ T11] loop_process_work+0xbf0/0x200c [ 55.122074][ T11] loop_rootcg_workfn+0x28/0x38 [ 55.122920][ T11] process_one_work+0x7e4/0x13bc [ 55.123791][ T11] worker_thread+0x8cc/0xfe8 [ 55.124581][ T11] kthread+0x254/0x2e0 [ 55.125286][ T11] ret_from_fork+0x10/0x20 [ 55.126585][ T11] memory: usage 96kB, limit 96kB, failcnt 86811 [ 55.127605][ T11] memory+swap: usage 2432kB, limit 9007199254740988kB, failcnt 0 [ 55.129159][ T11] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 55.130325][ T11] Memory cgroup stats for /syz0/test: [ 55.130405][ T11] anon 0 [ 55.130405][ T11] file 65536 [ 55.130405][ T11] kernel 24576 [ 55.130405][ T11] kernel_stack 0 [ 55.130405][ T11] pagetables 0 [ 55.130405][ T11] sec_pagetables 0 [ 55.130405][ T11] percpu 0 [ 55.130405][ T11] sock 0 [ 55.130405][ T11] vmalloc 0 [ 55.130405][ T11] shmem 61440 [ 55.130405][ T11] zswap 0 [ 55.130405][ T11] zswapped 0 [ 55.130405][ T11] file_mapped 0 [ 55.130405][ T11] file_dirty 0 [ 55.130405][ T11] file_writeback 0 [ 55.130405][ T11] swapcached 24727552 [ 55.130405][ T11] anon_thp 0 [ 55.130405][ T11] file_thp 0 [ 55.130405][ T11] shmem_thp 0 [ 55.130405][ T11] inactive_anon 32768 [ 55.130405][ T11] active_anon 28672 [ 55.130405][ T11] inactive_file 0 [ 55.130405][ T11] active_file 12288 [ 55.130405][ T11] unevictable 0 [ 55.130405][ T11] slab_reclaimable 18552 [ 55.130405][ T11] slab_unreclaimable 3896 [ 55.130405][ T11] slab 22448 [ 55.147305][ T11] Out of memory and no killable processes... [ 55.152850][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 55.155433][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 55.156631][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.158284][ T11] Workqueue: loop0 loop_rootcg_workfn [ 55.159303][ T11] Call trace: [ 55.159901][ T11] dump_backtrace+0x1c4/0x1f0 [ 55.160780][ T11] show_stack+0x2c/0x3c [ 55.161559][ T11] __dump_stack+0x30/0x40 [ 55.162339][ T11] dump_stack_lvl+0xf4/0x15c [ 55.163166][ T11] dump_stack+0x1c/0x5c [ 55.163919][ T11] dump_header+0xc0/0x724 [ 55.164699][ T11] out_of_memory+0xc78/0xf70 [ 55.165534][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 55.166527][ T11] try_charge_memcg+0xa4c/0x1390 [ 55.167420][ T11] charge_memcg+0xa4/0x1f0 [ 55.168182][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 55.169209][ T11] __read_swap_cache_async+0x378/0x688 [ 55.170141][ T11] swap_cluster_readahead+0x6c0/0x818 [ 55.171081][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 55.172015][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 55.172939][ T11] shmem_file_read_iter+0x210/0x954 [ 55.173846][ T11] do_iter_read+0x4d4/0x8b4 [ 55.174632][ T11] vfs_iter_read+0x88/0xac [ 55.175387][ T11] loop_process_work+0xbf0/0x200c [ 55.176267][ T11] loop_rootcg_workfn+0x28/0x38 [ 55.177107][ T11] process_one_work+0x7e4/0x13bc [ 55.177970][ T11] worker_thread+0x8cc/0xfe8 [ 55.178777][ T11] kthread+0x254/0x2e0 [ 55.179489][ T11] ret_from_fork+0x10/0x20 [ 55.182160][ T11] memory: usage 96kB, limit 96kB, failcnt 86832 [ 55.183090][ T11] memory+swap: usage 2416kB, limit 9007199254740988kB, failcnt 0 [ 55.184304][ T11] kmem: usage 12kB, limit 9007199254740988kB, failcnt 0 [ 55.185373][ T11] Memory cgroup stats for /syz0/test: [ 55.185460][ T11] anon 4096 [ 55.185460][ T11] file 4096 [ 55.185460][ T11] kernel 12288 [ 55.185460][ T11] kernel_stack 0 [ 55.185460][ T11] pagetables 0 [ 55.185460][ T11] sec_pagetables 0 [ 55.185460][ T11] percpu 0 [ 55.185460][ T11] sock 0 [ 55.185460][ T11] vmalloc 0 [ 55.185460][ T11] shmem 0 [ 55.185460][ T11] zswap 0 [ 55.185460][ T11] zswapped 0 [ 55.185460][ T11] file_mapped 0 [ 55.185460][ T11] file_dirty 0 [ 55.185460][ T11] file_writeback 81920 [ 55.185460][ T11] swapcached 24891392 [ 55.185460][ T11] anon_thp 0 [ 55.185460][ T11] file_thp 0 [ 55.185460][ T11] shmem_thp 0 [ 55.185460][ T11] inactive_anon 0 [ 55.185460][ T11] active_anon 81920 [ 55.185460][ T11] inactive_file 0 [ 55.185460][ T11] active_file 4096 [ 55.185460][ T11] unevictable 0 [ 55.185460][ T11] slab_reclaimable 8464 [ 55.185460][ T11] slab_unreclaimable 2272 [ 55.185460][ T11] slab 10736 [ 55.202051][ T11] Out of memory and no killable processes... [ 55.274585][ T4515] loop0: detected capacity change from 0 to 4096 [ 55.278453][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 55.281021][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 55.282241][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.283946][ T11] Workqueue: loop0 loop_workfn [ 55.284759][ T11] Call trace: [ 55.285324][ T11] dump_backtrace+0x1c4/0x1f0 [ 55.286142][ T11] show_stack+0x2c/0x3c [ 55.286870][ T11] __dump_stack+0x30/0x40 [ 55.287669][ T11] dump_stack_lvl+0xf4/0x15c [ 55.288494][ T11] dump_stack+0x1c/0x5c [ 55.289201][ T11] dump_header+0xc0/0x724 [ 55.290125][ T11] oom_kill_process+0x35c/0x660 [ 55.290959][ T11] out_of_memory+0xbf0/0xf70 [ 55.291728][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 55.292702][ T11] try_charge_memcg+0xa4c/0x1390 [ 55.293500][ T11] charge_memcg+0xa4/0x1f0 [ 55.294245][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 55.295319][ T11] __read_swap_cache_async+0x378/0x688 [ 55.296313][ T11] swap_cluster_readahead+0x6c0/0x818 [ 55.297264][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 55.298198][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 55.299091][ T11] shmem_file_read_iter+0x210/0x954 [ 55.299985][ T11] do_iter_read+0x4d4/0x8b4 [ 55.300760][ T11] vfs_iter_read+0x88/0xac [ 55.301531][ T11] loop_process_work+0xbf0/0x200c [ 55.302420][ T11] loop_workfn+0x48/0x58 [ 55.303176][ T11] process_one_work+0x7e4/0x13bc [ 55.304066][ T11] worker_thread+0x8cc/0xfe8 [ 55.304855][ T11] kthread+0x254/0x2e0 [ 55.305556][ T11] ret_from_fork+0x10/0x20 [ 55.307103][ T11] memory: usage 96kB, limit 96kB, failcnt 87942 [ 55.308534][ T11] memory+swap: usage 2308kB, limit 9007199254740988kB, failcnt 0 [ 55.309861][ T11] kmem: usage 32kB, limit 9007199254740988kB, failcnt 0 [ 55.311028][ T11] Memory cgroup stats for /syz0/test: [ 55.311141][ T11] anon 4096 [ 55.311141][ T11] file 53248 [ 55.311141][ T11] kernel 32768 [ 55.311141][ T11] kernel_stack 0 [ 55.311141][ T11] pagetables 0 [ 55.311141][ T11] sec_pagetables 0 [ 55.311141][ T11] percpu 0 [ 55.311141][ T11] sock 0 [ 55.311141][ T11] vmalloc 0 [ 55.311141][ T11] shmem 45056 [ 55.311141][ T11] zswap 0 [ 55.311141][ T11] zswapped 0 [ 55.311141][ T11] file_mapped 0 [ 55.311141][ T11] file_dirty 0 [ 55.311141][ T11] file_writeback 0 [ 55.311141][ T11] swapcached 28778496 [ 55.311141][ T11] anon_thp 0 [ 55.311141][ T11] file_thp 0 [ 55.311141][ T11] shmem_thp 0 [ 55.311141][ T11] inactive_anon 24576 [ 55.311141][ T11] active_anon 32768 [ 55.311141][ T11] inactive_file 0 [ 55.311141][ T11] active_file 8192 [ 55.311141][ T11] unevictable 0 [ 55.311141][ T11] slab_reclaimable 15472 [ 55.311141][ T11] slab_unreclaimable 5840 [ 55.311141][ T11] slab 21312 [ 55.328022][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.24,pid=4515,uid=0 [ 55.330658][ T11] Memory cgroup out of memory: Killed process 4515 (syz.0.24) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 55.342644][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 55.345062][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 55.346315][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.347886][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 55.348829][ T4446] Call trace: [ 55.349409][ T4446] dump_backtrace+0x1c4/0x1f0 [ 55.350288][ T4446] show_stack+0x2c/0x3c [ 55.351004][ T4446] __dump_stack+0x30/0x40 [ 55.351740][ T4446] dump_stack_lvl+0xf4/0x15c [ 55.352558][ T4446] dump_stack+0x1c/0x5c [ 55.353289][ T4446] dump_header+0xc0/0x724 [ 55.354018][ T4446] out_of_memory+0xc78/0xf70 [ 55.354813][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 55.355787][ T4446] try_charge_memcg+0xa4c/0x1390 [ 55.356692][ T4446] charge_memcg+0xa4/0x1f0 [ 55.357491][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 55.358650][ T4446] __read_swap_cache_async+0x378/0x688 [ 55.359637][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 55.360619][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 55.361585][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 55.362561][ T4446] shmem_file_read_iter+0x210/0x954 [ 55.363542][ T4446] do_iter_read+0x4d4/0x8b4 [ 55.364364][ T4446] vfs_iter_read+0x88/0xac [ 55.365162][ T4446] loop_process_work+0xbf0/0x200c [ 55.366012][ T4446] loop_rootcg_workfn+0x28/0x38 [ 55.366840][ T4446] process_one_work+0x7e4/0x13bc [ 55.367699][ T4446] worker_thread+0x8cc/0xfe8 [ 55.368545][ T4446] kthread+0x254/0x2e0 [ 55.369278][ T4446] ret_from_fork+0x10/0x20 [ 55.370392][ T4446] memory: usage 96kB, limit 96kB, failcnt 87966 [ 55.371450][ T4446] memory+swap: usage 2292kB, limit 9007199254740988kB, failcnt 0 [ 55.372762][ T4446] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 55.373948][ T4446] Memory cgroup stats for /syz0/test: [ 55.374042][ T4446] anon 0 [ 55.374042][ T4446] file 65536 [ 55.374042][ T4446] kernel 24576 [ 55.374042][ T4446] kernel_stack 0 [ 55.374042][ T4446] pagetables 0 [ 55.374042][ T4446] sec_pagetables 0 [ 55.374042][ T4446] percpu 0 [ 55.374042][ T4446] sock 0 [ 55.374042][ T4446] vmalloc 0 [ 55.374042][ T4446] shmem 61440 [ 55.374042][ T4446] zswap 0 [ 55.374042][ T4446] zswapped 0 [ 55.374042][ T4446] file_mapped 0 [ 55.374042][ T4446] file_dirty 0 [ 55.374042][ T4446] file_writeback 0 [ 55.374042][ T4446] swapcached 28766208 [ 55.374042][ T4446] anon_thp 0 [ 55.374042][ T4446] file_thp 0 [ 55.374042][ T4446] shmem_thp 0 [ 55.374042][ T4446] inactive_anon 24576 [ 55.374042][ T4446] active_anon 32768 [ 55.374042][ T4446] inactive_file 0 [ 55.374042][ T4446] active_file 12288 [ 55.374042][ T4446] unevictable 0 [ 55.374042][ T4446] slab_reclaimable 18552 [ 55.374042][ T4446] slab_unreclaimable 3896 [ 55.374042][ T4446] slab 22448 [ 55.389763][ T4446] Out of memory and no killable processes... [ 55.393397][ T4446] kworker/u4:6 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 55.395721][ T4446] CPU: 0 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 55.396988][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.398687][ T4446] Workqueue: loop0 loop_rootcg_workfn [ 55.399627][ T4446] Call trace: [ 55.400200][ T4446] dump_backtrace+0x1c4/0x1f0 [ 55.401037][ T4446] show_stack+0x2c/0x3c [ 55.401786][ T4446] __dump_stack+0x30/0x40 [ 55.402589][ T4446] dump_stack_lvl+0xf4/0x15c [ 55.403416][ T4446] dump_stack+0x1c/0x5c [ 55.404164][ T4446] dump_header+0xc0/0x724 [ 55.404959][ T4446] out_of_memory+0xc78/0xf70 [ 55.405811][ T4446] mem_cgroup_out_of_memory+0x228/0x2d0 [ 55.406858][ T4446] try_charge_memcg+0xa4c/0x1390 [ 55.407806][ T4446] charge_memcg+0xa4/0x1f0 [ 55.408584][ T4446] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 55.409642][ T4446] __read_swap_cache_async+0x378/0x688 [ 55.410608][ T4446] swap_cluster_readahead+0x6c0/0x818 [ 55.411572][ T4446] shmem_swapin_folio+0x5c4/0x1170 [ 55.412460][ T4446] shmem_get_folio_gfp+0x274/0x2038 [ 55.413344][ T4446] shmem_file_read_iter+0x210/0x954 [ 55.414297][ T4446] do_iter_read+0x4d4/0x8b4 [ 55.415120][ T4446] vfs_iter_read+0x88/0xac [ 55.415922][ T4446] loop_process_work+0xbf0/0x200c [ 55.416795][ T4446] loop_rootcg_workfn+0x28/0x38 [ 55.417650][ T4446] process_one_work+0x7e4/0x13bc [ 55.418514][ T4446] worker_thread+0x8cc/0xfe8 [ 55.419330][ T4446] kthread+0x254/0x2e0 [ 55.420045][ T4446] ret_from_fork+0x10/0x20 [ 55.421465][ T4446] memory: usage 92kB, limit 96kB, failcnt 87985 [ 55.422462][ T4446] memory+swap: usage 2288kB, limit 9007199254740988kB, failcnt 0 [ 55.423738][ T4446] kmem: usage 16kB, limit 9007199254740988kB, failcnt 0 [ 55.424832][ T4446] Memory cgroup stats for /syz0/test: [ 55.424919][ T4446] anon 0 [ 55.424919][ T4446] file 65536 [ 55.424919][ T4446] kernel 16384 [ 55.424919][ T4446] kernel_stack 0 [ 55.424919][ T4446] pagetables 0 [ 55.424919][ T4446] sec_pagetables 0 [ 55.424919][ T4446] percpu 0 [ 55.424919][ T4446] sock 0 [ 55.424919][ T4446] vmalloc 0 [ 55.424919][ T4446] shmem 61440 [ 55.424919][ T4446] zswap 0 [ 55.424919][ T4446] zswapped 0 [ 55.424919][ T4446] file_mapped 0 [ 55.424919][ T4446] file_dirty 0 [ 55.424919][ T4446] file_writeback 0 [ 55.424919][ T4446] swapcached 28766208 [ 55.424919][ T4446] anon_thp 0 [ 55.424919][ T4446] file_thp 0 [ 55.424919][ T4446] shmem_thp 0 [ 55.424919][ T4446] inactive_anon 24576 [ 55.424919][ T4446] active_anon 36864 [ 55.424919][ T4446] inactive_file 0 [ 55.424919][ T4446] active_file 12288 [ 55.424919][ T4446] unevictable 0 [ 55.424919][ T4446] slab_reclaimable 10384 [ 55.424919][ T4446] slab_unreclaimable 2272 [ 55.424919][ T4446] slab 12656 [ 55.447940][ T4446] Out of memory and no killable processes... [ 55.532524][ T4516] loop0: detected capacity change from 0 to 4096 [ 55.571615][ T4516] ntfs: volume version 3.1. [ 55.585218][ T4446] [ 55.585700][ T4446] ====================================================== [ 55.586902][ T4446] WARNING: possible circular locking dependency detected [ 55.588075][ T4446] syzkaller #0 Not tainted [ 55.588861][ T4446] ------------------------------------------------------ [ 55.590215][ T4446] kworker/u4:6/4446 is trying to acquire lock: [ 55.591340][ T4446] ffff0000f2d3f480 (&rl->lock){++++}-{3:3}, at: ntfs_read_folio+0xe7c/0x1cd4 [ 55.592972][ T4446] [ 55.592972][ T4446] but task is already holding lock: [ 55.594388][ T4446] ffff0000f2d7a290 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x60/0x634 [ 55.596016][ T4446] [ 55.596016][ T4446] which lock already depends on the new lock. [ 55.596016][ T4446] [ 55.597912][ T4446] [ 55.597912][ T4446] the existing dependency chain (in reverse order) is: [ 55.599456][ T4446] [ 55.599456][ T4446] -> #1 (&ni->mrec_lock){+.+.}-{3:3}: [ 55.600774][ T4446] __mutex_lock_common+0x1a0/0x1f3c [ 55.601841][ T4446] mutex_lock_nested+0x38/0x44 [ 55.602797][ T4446] map_mft_record+0x60/0x634 [ 55.603723][ T4446] ntfs_truncate+0x1e0/0x231c [ 55.604625][ T4446] ntfs_setattr+0x260/0x320 [ 55.605485][ T4446] notify_change+0xb5c/0xe20 [ 55.606358][ T4446] do_truncate+0x188/0x20c [ 55.607193][ T4446] path_openat+0x21c8/0x27a0 [ 55.608072][ T4446] do_filp_open+0x198/0x38c [ 55.608922][ T4446] do_sys_openat2+0x134/0x3fc [ 55.609795][ T4446] __arm64_sys_openat+0x11c/0x150 [ 55.610784][ T4446] invoke_syscall+0x98/0x290 [ 55.611665][ T4446] el0_svc_common+0x13c/0x258 [ 55.612585][ T4446] do_el0_svc+0x5c/0x134 [ 55.613402][ T4446] el0_svc+0x58/0x12c [ 55.614169][ T4446] el0t_64_sync_handler+0x84/0xf0 [ 55.615133][ T4446] el0t_64_sync+0x18c/0x190 [ 55.615990][ T4446] [ 55.615990][ T4446] -> #0 (&rl->lock){++++}-{3:3}: [ 55.617208][ T4446] __lock_acquire+0x3504/0x7280 [ 55.618087][ T4446] lock_acquire+0x210/0x63c [ 55.618915][ T4446] down_read+0x64/0x300 [ 55.619753][ T4446] ntfs_read_folio+0xe7c/0x1cd4 [ 55.620705][ T4446] filemap_read_folio+0x134/0x384 [ 55.621664][ T4446] do_read_cache_folio+0x24c/0x534 [ 55.622633][ T4446] read_cache_page+0x6c/0x184 [ 55.623547][ T4446] ntfs_sync_mft_mirror+0x1f4/0x18e4 [ 55.624533][ T4446] write_mft_record_nolock+0x1048/0x1660 [ 55.625566][ T4446] write_mft_record+0x144/0x1b8 [ 55.626466][ T4446] __ntfs_write_inode+0x5c0/0xa60 [ 55.627445][ T4446] ntfs_write_inode+0x68/0x90 [ 55.628386][ T4446] __writeback_single_inode+0x5e0/0x157c [ 55.629538][ T4446] writeback_sb_inodes+0x870/0x1470 [ 55.630571][ T4446] wb_writeback+0x40c/0xfdc [ 55.631510][ T4446] wb_workfn+0x360/0xe18 [ 55.632405][ T4446] process_one_work+0x7e4/0x13bc [ 55.633441][ T4446] worker_thread+0x8cc/0xfe8 [ 55.634391][ T4446] kthread+0x254/0x2e0 [ 55.635215][ T4446] ret_from_fork+0x10/0x20 [ 55.636114][ T4446] [ 55.636114][ T4446] other info that might help us debug this: [ 55.636114][ T4446] [ 55.637950][ T4446] Possible unsafe locking scenario: [ 55.637950][ T4446] [ 55.639265][ T4446] CPU0 CPU1 [ 55.640220][ T4446] ---- ---- [ 55.641143][ T4446] lock(&ni->mrec_lock); [ 55.641899][ T4446] lock(&rl->lock); [ 55.643005][ T4446] lock(&ni->mrec_lock); [ 55.644250][ T4446] rlock(&rl->lock); [ 55.644923][ T4446] [ 55.644923][ T4446] *** DEADLOCK *** [ 55.644923][ T4446] [ 55.646344][ T4446] 3 locks held by kworker/u4:6/4446: [ 55.647275][ T4446] #0: ffff0000c2c34138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc [ 55.649144][ T4446] #1: ffff800020e87c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc [ 55.651312][ T4446] #2: ffff0000f2d7a290 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x60/0x634 [ 55.652957][ T4446] [ 55.652957][ T4446] stack backtrace: [ 55.653989][ T4446] CPU: 1 PID: 4446 Comm: kworker/u4:6 Not tainted syzkaller #0 [ 55.655315][ T4446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.657008][ T4446] Workqueue: writeback wb_workfn (flush-7:0) [ 55.658038][ T4446] Call trace: [ 55.658595][ T4446] dump_backtrace+0x1c4/0x1f0 [ 55.659443][ T4446] show_stack+0x2c/0x3c [ 55.660159][ T4446] __dump_stack+0x30/0x40 [ 55.660933][ T4446] dump_stack_lvl+0xf4/0x15c [ 55.661734][ T4446] dump_stack+0x1c/0x5c [ 55.662498][ T4446] print_circular_bug+0x148/0x1b0 [ 55.663386][ T4446] check_noncircular+0x290/0x370 [ 55.664240][ T4446] __lock_acquire+0x3504/0x7280 [ 55.665094][ T4446] lock_acquire+0x210/0x63c [ 55.665880][ T4446] down_read+0x64/0x300 [ 55.666627][ T4446] ntfs_read_folio+0xe7c/0x1cd4 [ 55.667486][ T4446] filemap_read_folio+0x134/0x384 [ 55.668385][ T4446] do_read_cache_folio+0x24c/0x534 [ 55.669319][ T4446] read_cache_page+0x6c/0x184 [ 55.670149][ T4446] ntfs_sync_mft_mirror+0x1f4/0x18e4 [ 55.671099][ T4446] write_mft_record_nolock+0x1048/0x1660 [ 55.672135][ T4446] write_mft_record+0x144/0x1b8 [ 55.672994][ T4446] __ntfs_write_inode+0x5c0/0xa60 [ 55.673887][ T4446] ntfs_write_inode+0x68/0x90 [ 55.674723][ T4446] __writeback_single_inode+0x5e0/0x157c [ 55.675695][ T4446] writeback_sb_inodes+0x870/0x1470 [ 55.676622][ T4446] wb_writeback+0x40c/0xfdc [ 55.677441][ T4446] wb_workfn+0x360/0xe18 [ 55.678227][ T4446] process_one_work+0x7e4/0x13bc [ 55.679095][ T4446] worker_thread+0x8cc/0xfe8 [ 55.679928][ T4446] kthread+0x254/0x2e0 [ 55.680693][ T4446] ret_from_fork+0x10/0x20 [ 55.798728][ T4517] loop0: detected capacity change from 0 to 4096 [ 55.804428][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 55.806857][ T11] CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 55.808142][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.809962][ T11] Workqueue: loop0 loop_rootcg_workfn [ 55.810922][ T11] Call trace: [ 55.811501][ T11] dump_backtrace+0x1c4/0x1f0 [ 55.812347][ T11] show_stack+0x2c/0x3c [ 55.813140][ T11] __dump_stack+0x30/0x40 [ 55.813955][ T11] dump_stack_lvl+0xf4/0x15c [ 55.814810][ T11] dump_stack+0x1c/0x5c [ 55.815585][ T11] dump_header+0xc0/0x724 [ 55.816337][ T11] oom_kill_process+0x35c/0x660 [ 55.817197][ T11] out_of_memory+0xbf0/0xf70 [ 55.818013][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 55.819017][ T11] try_charge_memcg+0xa4c/0x1390 [ 55.819904][ T11] charge_memcg+0xa4/0x1f0 [ 55.820703][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 55.821810][ T11] __read_swap_cache_async+0x378/0x688 [ 55.822779][ T11] swap_cluster_readahead+0x6c0/0x818 [ 55.823762][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 55.824697][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 55.825628][ T11] shmem_file_read_iter+0x210/0x954 [ 55.826541][ T11] do_iter_read+0x4d4/0x8b4 [ 55.827330][ T11] vfs_iter_read+0x88/0xac [ 55.828101][ T11] loop_process_work+0xbf0/0x200c [ 55.829000][ T11] loop_rootcg_workfn+0x28/0x38 [ 55.829877][ T11] process_one_work+0x7e4/0x13bc [ 55.830764][ T11] worker_thread+0x8cc/0xfe8 [ 55.831612][ T11] kthread+0x254/0x2e0 [ 55.832368][ T11] ret_from_fork+0x10/0x20 [ 55.833453][ T11] memory: usage 96kB, limit 96kB, failcnt 90393 [ 55.834513][ T11] memory+swap: usage 2404kB, limit 9007199254740988kB, failcnt 0 [ 55.835755][ T11] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 55.836848][ T11] Memory cgroup stats for /syz0/test: [ 55.836917][ T11] anon 4096 [ 55.836917][ T11] file 61440 [ 55.836917][ T11] kernel 24576 [ 55.836917][ T11] kernel_stack 0 [ 55.836917][ T11] pagetables 0 [ 55.836917][ T11] sec_pagetables 0 [ 55.836917][ T11] percpu 0 [ 55.836917][ T11] sock 0 [ 55.836917][ T11] vmalloc 0 [ 55.836917][ T11] shmem 61440 [ 55.836917][ T11] zswap 0 [ 55.836917][ T11] zswapped 0 [ 55.836917][ T11] file_mapped 0 [ 55.836917][ T11] file_dirty 0 [ 55.836917][ T11] file_writeback 0 [ 55.836917][ T11] swapcached 37384192 [ 55.836917][ T11] anon_thp 0 [ 55.836917][ T11] file_thp 0 [ 55.836917][ T11] shmem_thp 0 [ 55.836917][ T11] inactive_anon 61440 [ 55.836917][ T11] active_anon 12288 [ 55.836917][ T11] inactive_file 0 [ 55.836917][ T11] active_file 0 [ 55.836917][ T11] unevictable 0 [ 55.836917][ T11] slab_reclaimable 7176 [ 55.836917][ T11] slab_unreclaimable 5840 [ 55.836917][ T11] slab 13016 [ 55.853386][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.26,pid=4517,uid=0 [ 55.855927][ T11] Memory cgroup out of memory: Killed process 4517 (syz.0.26) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 57.918740][ T29] oom_reaper: reaped process 4517 (syz.0.26), now anon-rss:0kB, file-rss:72kB, shmem-rss:0kB [ 57.920682][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 57.922992][ T11] CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 57.924164][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 57.925802][ T11] Workqueue: loop0 loop_workfn [ 57.926715][ T11] Call trace: [ 57.927292][ T11] dump_backtrace+0x1c4/0x1f0 [ 57.928154][ T11] show_stack+0x2c/0x3c [ 57.928966][ T11] __dump_stack+0x30/0x40 [ 57.929798][ T11] dump_stack_lvl+0xf4/0x15c [ 57.930656][ T11] dump_stack+0x1c/0x5c [ 57.931442][ T11] dump_header+0xc0/0x724 [ 57.932259][ T11] out_of_memory+0xc78/0xf70 [ 57.933160][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 57.934221][ T11] try_charge_memcg+0xa4c/0x1390 [ 57.935185][ T11] charge_memcg+0xa4/0x1f0 [ 57.936019][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 57.937157][ T11] __read_swap_cache_async+0x378/0x688 [ 57.938127][ T11] swap_cluster_readahead+0x6c0/0x818 [ 57.939096][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 57.939999][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 57.940927][ T11] shmem_file_read_iter+0x210/0x954 [ 57.941864][ T11] do_iter_read+0x4d4/0x8b4 [ 57.942711][ T11] vfs_iter_read+0x88/0xac [ 57.943553][ T11] loop_process_work+0xbf0/0x200c [ 57.944489][ T11] loop_workfn+0x48/0x58 [ 57.945233][ T11] process_one_work+0x7e4/0x13bc [ 57.946126][ T11] worker_thread+0x8cc/0xfe8 [ 57.946953][ T11] kthread+0x254/0x2e0 [ 57.947689][ T11] ret_from_fork+0x10/0x20 [ 57.948852][ T11] memory: usage 96kB, limit 96kB, failcnt 147540 [ 57.949896][ T11] memory+swap: usage 2152kB, limit 9007199254740988kB, failcnt 0 [ 57.951193][ T11] kmem: usage 20kB, limit 9007199254740988kB, failcnt 0 [ 57.952351][ T11] Memory cgroup stats for /syz0/test: [ 57.952429][ T11] anon 0 [ 57.952429][ T11] file 77824 [ 57.952429][ T11] kernel 20480 [ 57.952429][ T11] kernel_stack 0 [ 57.952429][ T11] pagetables 0 [ 57.952429][ T11] sec_pagetables 0 [ 57.952429][ T11] percpu 0 [ 57.952429][ T11] sock 0 [ 57.952429][ T11] vmalloc 0 [ 57.952429][ T11] shmem 73728 [ 57.952429][ T11] zswap 0 [ 57.952429][ T11] zswapped 0 [ 57.952429][ T11] file_mapped 0 [ 57.952429][ T11] file_dirty 0 [ 57.952429][ T11] file_writeback 0 [ 57.952429][ T11] swapcached 37384192 [ 57.952429][ T11] anon_thp 0 [ 57.952429][ T11] file_thp 0 [ 57.952429][ T11] shmem_thp 0 [ 57.952429][ T11] inactive_anon 69632 [ 57.952429][ T11] active_anon 4096 [ 57.952429][ T11] inactive_file 0 [ 57.952429][ T11] active_file 4096 [ 57.952429][ T11] unevictable 0 [ 57.952429][ T11] slab_reclaimable 10968 [ 57.952429][ T11] slab_unreclaimable 5192 [ 57.952429][ T11] slab 16160 [ 57.969062][ T11] Out of memory and no killable processes... [ 57.970126][ T4509] kworker/u4:7 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 57.972362][ T4509] CPU: 1 PID: 4509 Comm: kworker/u4:7 Not tainted syzkaller #0 [ 57.973563][ T4509] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 57.975088][ T4509] Workqueue: loop0 loop_rootcg_workfn [ 57.975954][ T4509] Call trace: [ 57.976455][ T4509] dump_backtrace+0x1c4/0x1f0 [ 57.977213][ T4509] show_stack+0x2c/0x3c [ 57.977891][ T4509] __dump_stack+0x30/0x40 [ 57.978628][ T4509] dump_stack_lvl+0xf4/0x15c [ 57.979407][ T4509] dump_stack+0x1c/0x5c [ 57.980158][ T4509] dump_header+0xc0/0x724 [ 57.980908][ T4509] out_of_memory+0xc78/0xf70 [ 57.981715][ T4509] mem_cgroup_out_of_memory+0x228/0x2d0 [ 57.982684][ T4509] try_charge_memcg+0xa4c/0x1390 [ 57.983527][ T4509] charge_memcg+0xa4/0x1f0 [ 57.984314][ T4509] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 57.985399][ T4509] __read_swap_cache_async+0x378/0x688 [ 57.986385][ T4509] swap_cluster_readahead+0x6c0/0x818 [ 57.987291][ T4509] shmem_swapin_folio+0x5c4/0x1170 [ 57.988205][ T4509] shmem_get_folio_gfp+0x274/0x2038 [ 57.989108][ T4509] shmem_file_read_iter+0x210/0x954 [ 57.990014][ T4509] do_iter_read+0x4d4/0x8b4 [ 57.990791][ T4509] vfs_iter_read+0x88/0xac [ 57.991568][ T4509] loop_process_work+0xbf0/0x200c [ 57.992453][ T4509] loop_rootcg_workfn+0x28/0x38 [ 57.993277][ T4509] process_one_work+0x7e4/0x13bc [ 57.994163][ T4509] worker_thread+0x8cc/0xfe8 [ 57.994947][ T4509] kthread+0x254/0x2e0 [ 57.995660][ T4509] ret_from_fork+0x10/0x20 [ 57.997372][ T4509] memory: usage 92kB, limit 96kB, failcnt 147540 [ 57.998754][ T4509] memory+swap: usage 2148kB, limit 9007199254740988kB, failcnt 0 [ 58.000019][ T4509] kmem: usage 16kB, limit 9007199254740988kB, failcnt 0 [ 58.001154][ T4509] Memory cgroup stats for /syz0/test: [ 58.001241][ T4509] anon 0 [ 58.001241][ T4509] file 77824 [ 58.001241][ T4509] kernel 16384 [ 58.001241][ T4509] kernel_stack 0 [ 58.001241][ T4509] pagetables 0 [ 58.001241][ T4509] sec_pagetables 0 [ 58.001241][ T4509] percpu 0 [ 58.001241][ T4509] sock 0 [ 58.001241][ T4509] vmalloc 0 [ 58.001241][ T4509] shmem 73728 [ 58.001241][ T4509] zswap 0 [ 58.001241][ T4509] zswapped 0 [ 58.001241][ T4509] file_mapped 0 [ 58.001241][ T4509] file_dirty 0 [ 58.001241][ T4509] file_writeback 0 [ 58.001241][ T4509] swapcached 37384192 [ 58.001241][ T4509] anon_thp 0 [ 58.001241][ T4509] file_thp 0 [ 58.001241][ T4509] shmem_thp 0 [ 58.001241][ T4509] inactive_anon 69632 [ 58.001241][ T4509] active_anon 4096 [ 58.001241][ T4509] inactive_file 0 [ 58.001241][ T4509] active_file 4096 [ 58.001241][ T4509] unevictable 0 [ 58.001241][ T4509] slab_reclaimable 10968 [ 58.001241][ T4509] slab_unreclaimable 3896 [ 58.001241][ T4509] slab 14864 [ 58.018231][ T4509] Out of memory and no killable processes... [ 58.074445][ T4518] loop0: detected capacity change from 0 to 4096 [ 58.094623][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.097032][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 58.098264][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.100166][ T11] Workqueue: loop0 loop_workfn [ 58.101201][ T11] Call trace: [ 58.101879][ T11] dump_backtrace+0x1c4/0x1f0 [ 58.102829][ T11] show_stack+0x2c/0x3c [ 58.103688][ T11] __dump_stack+0x30/0x40 [ 58.104526][ T11] dump_stack_lvl+0xf4/0x15c [ 58.105421][ T11] dump_stack+0x1c/0x5c [ 58.106185][ T11] dump_header+0xc0/0x724 [ 58.106933][ T11] oom_kill_process+0x35c/0x660 [ 58.107746][ T11] out_of_memory+0xbf0/0xf70 [ 58.108545][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.109567][ T11] try_charge_memcg+0xa4c/0x1390 [ 58.110472][ T11] charge_memcg+0xa4/0x1f0 [ 58.111237][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.112290][ T11] __read_swap_cache_async+0x378/0x688 [ 58.113291][ T11] swap_cluster_readahead+0x328/0x818 [ 58.114255][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 58.115133][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 58.116008][ T11] shmem_file_read_iter+0x210/0x954 [ 58.116889][ T11] do_iter_read+0x4d4/0x8b4 [ 58.117668][ T11] vfs_iter_read+0x88/0xac [ 58.118468][ T11] loop_process_work+0xbf0/0x200c [ 58.119338][ T11] loop_workfn+0x48/0x58 [ 58.120080][ T11] process_one_work+0x7e4/0x13bc [ 58.120933][ T11] worker_thread+0x8cc/0xfe8 [ 58.121726][ T11] kthread+0x254/0x2e0 [ 58.122444][ T11] ret_from_fork+0x10/0x20 [ 58.124243][ T11] memory: usage 80kB, limit 96kB, failcnt 148752 [ 58.125198][ T11] memory+swap: usage 2320kB, limit 9007199254740988kB, failcnt 0 [ 58.126363][ T11] kmem: usage 40kB, limit 9007199254740988kB, failcnt 0 [ 58.127702][ T11] Memory cgroup stats for /syz0/test: [ 58.127786][ T11] anon 0 [ 58.127786][ T11] file 32768 [ 58.127786][ T11] kernel 40960 [ 58.127786][ T11] kernel_stack 0 [ 58.127786][ T11] pagetables 0 [ 58.127786][ T11] sec_pagetables 0 [ 58.127786][ T11] percpu 0 [ 58.127786][ T11] sock 0 [ 58.127786][ T11] vmalloc 0 [ 58.127786][ T11] shmem 24576 [ 58.127786][ T11] zswap 0 [ 58.127786][ T11] zswapped 0 [ 58.127786][ T11] file_mapped 0 [ 58.127786][ T11] file_dirty 0 [ 58.127786][ T11] file_writeback 0 [ 58.127786][ T11] swapcached 41652224 [ 58.127786][ T11] anon_thp 0 [ 58.127786][ T11] file_thp 0 [ 58.127786][ T11] shmem_thp 0 [ 58.127786][ T11] inactive_anon 28672 [ 58.127786][ T11] active_anon 4096 [ 58.127786][ T11] inactive_file 0 [ 58.127786][ T11] active_file 8192 [ 58.127786][ T11] unevictable 0 [ 58.127786][ T11] slab_reclaimable 23752 [ 58.127786][ T11] slab_unreclaimable 5840 [ 58.127786][ T11] slab 29592 [ 58.144634][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.27,pid=4518,uid=0 [ 58.147314][ T11] Memory cgroup out of memory: Killed process 4518 (syz.0.27) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 58.306633][ T4519] loop0: detected capacity change from 0 to 4096 [ 58.312484][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.315011][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 58.316293][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.317970][ T39] Workqueue: loop0 loop_rootcg_workfn [ 58.318934][ T39] Call trace: [ 58.319521][ T39] dump_backtrace+0x1c4/0x1f0 [ 58.320431][ T39] show_stack+0x2c/0x3c [ 58.321228][ T39] __dump_stack+0x30/0x40 [ 58.321978][ T39] dump_stack_lvl+0xf4/0x15c [ 58.322803][ T39] dump_stack+0x1c/0x5c [ 58.323521][ T39] dump_header+0xc0/0x724 [ 58.324294][ T39] oom_kill_process+0x35c/0x660 [ 58.325179][ T39] out_of_memory+0xbf0/0xf70 [ 58.326027][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.327033][ T39] try_charge_memcg+0xa4c/0x1390 [ 58.327906][ T39] charge_memcg+0xa4/0x1f0 [ 58.328692][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.329735][ T39] __read_swap_cache_async+0x378/0x688 [ 58.330698][ T39] swap_cluster_readahead+0x6c0/0x818 [ 58.331649][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 58.332579][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 58.333487][ T39] shmem_file_read_iter+0x210/0x954 [ 58.334399][ T39] do_iter_read+0x4d4/0x8b4 [ 58.335172][ T39] vfs_iter_read+0x88/0xac [ 58.335967][ T39] loop_process_work+0xbf0/0x200c [ 58.336843][ T39] loop_rootcg_workfn+0x28/0x38 [ 58.337701][ T39] process_one_work+0x7e4/0x13bc [ 58.338607][ T39] worker_thread+0x8cc/0xfe8 [ 58.339451][ T39] kthread+0x254/0x2e0 [ 58.340171][ T39] ret_from_fork+0x10/0x20 [ 58.341680][ T39] memory: usage 96kB, limit 96kB, failcnt 149828 [ 58.342927][ T39] memory+swap: usage 2384kB, limit 9007199254740988kB, failcnt 0 [ 58.344277][ T39] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 58.345440][ T39] Memory cgroup stats for /syz0/test: [ 58.345526][ T39] anon 4096 [ 58.345526][ T39] file 57344 [ 58.345526][ T39] kernel 24576 [ 58.345526][ T39] kernel_stack 0 [ 58.345526][ T39] pagetables 0 [ 58.345526][ T39] sec_pagetables 0 [ 58.345526][ T39] percpu 0 [ 58.345526][ T39] sock 0 [ 58.345526][ T39] vmalloc 0 [ 58.345526][ T39] shmem 57344 [ 58.345526][ T39] zswap 0 [ 58.345526][ T39] zswapped 0 [ 58.345526][ T39] file_mapped 0 [ 58.345526][ T39] file_dirty 0 [ 58.345526][ T39] file_writeback 0 [ 58.345526][ T39] swapcached 45641728 [ 58.345526][ T39] anon_thp 0 [ 58.345526][ T39] file_thp 0 [ 58.345526][ T39] shmem_thp 0 [ 58.345526][ T39] inactive_anon 57344 [ 58.345526][ T39] active_anon 16384 [ 58.345526][ T39] inactive_file 0 [ 58.345526][ T39] active_file 0 [ 58.345526][ T39] unevictable 0 [ 58.345526][ T39] slab_reclaimable 7176 [ 58.345526][ T39] slab_unreclaimable 5840 [ 58.345526][ T39] slab 13016 [ 58.362790][ T39] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.28,pid=4519,uid=0 [ 58.365333][ T39] Memory cgroup out of memory: Killed process 4519 (syz.0.28) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 58.378691][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.381134][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 58.382454][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.384171][ T11] Workqueue: loop0 loop_rootcg_workfn [ 58.385181][ T11] Call trace: [ 58.385809][ T11] dump_backtrace+0x1c4/0x1f0 [ 58.386648][ T11] show_stack+0x2c/0x3c [ 58.387316][ T11] __dump_stack+0x30/0x40 [ 58.388091][ T11] dump_stack_lvl+0xf4/0x15c [ 58.388959][ T11] dump_stack+0x1c/0x5c [ 58.389763][ T11] dump_header+0xc0/0x724 [ 58.390548][ T11] out_of_memory+0xc78/0xf70 [ 58.391362][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.392451][ T11] try_charge_memcg+0xa4c/0x1390 [ 58.393387][ T11] charge_memcg+0xa4/0x1f0 [ 58.394252][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.395514][ T11] __read_swap_cache_async+0x378/0x688 [ 58.396559][ T11] swap_cluster_readahead+0x6c0/0x818 [ 58.397589][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 58.398530][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 58.399481][ T11] shmem_file_read_iter+0x210/0x954 [ 58.400404][ T11] do_iter_read+0x4d4/0x8b4 [ 58.401219][ T11] vfs_iter_read+0x88/0xac [ 58.402029][ T11] loop_process_work+0xbf0/0x200c [ 58.402945][ T11] loop_rootcg_workfn+0x28/0x38 [ 58.403790][ T11] process_one_work+0x7e4/0x13bc [ 58.404655][ T11] worker_thread+0x8cc/0xfe8 [ 58.405482][ T11] kthread+0x254/0x2e0 [ 58.406212][ T11] ret_from_fork+0x10/0x20 [ 58.407580][ T11] memory: usage 96kB, limit 96kB, failcnt 149876 [ 58.408798][ T11] memory+swap: usage 2380kB, limit 9007199254740988kB, failcnt 0 [ 58.410100][ T11] kmem: usage 16kB, limit 9007199254740988kB, failcnt 0 [ 58.411282][ T11] Memory cgroup stats for /syz0/test: [ 58.411377][ T11] anon 0 [ 58.411377][ T11] file 81920 [ 58.411377][ T11] kernel 16384 [ 58.411377][ T11] kernel_stack 0 [ 58.411377][ T11] pagetables 0 [ 58.411377][ T11] sec_pagetables 0 [ 58.411377][ T11] percpu 0 [ 58.411377][ T11] sock 0 [ 58.411377][ T11] vmalloc 0 [ 58.411377][ T11] shmem 77824 [ 58.411377][ T11] zswap 0 [ 58.411377][ T11] zswapped 0 [ 58.411377][ T11] file_mapped 0 [ 58.411377][ T11] file_dirty 0 [ 58.411377][ T11] file_writeback 0 [ 58.411377][ T11] swapcached 45711360 [ 58.411377][ T11] anon_thp 0 [ 58.411377][ T11] file_thp 0 [ 58.411377][ T11] shmem_thp 0 [ 58.411377][ T11] inactive_anon 69632 [ 58.411377][ T11] active_anon 8192 [ 58.411377][ T11] inactive_file 0 [ 58.411377][ T11] active_file 4096 [ 58.411377][ T11] unevictable 0 [ 58.411377][ T11] slab_reclaimable 10968 [ 58.411377][ T11] slab_unreclaimable 3896 [ 58.411377][ T11] slab 14864 [ 58.427332][ T11] Out of memory and no killable processes... [ 58.490958][ T4520] loop0: detected capacity change from 0 to 4096 [ 58.494030][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.496441][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 58.497735][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.499729][ T11] Workqueue: loop0 loop_workfn [ 58.500680][ T11] Call trace: [ 58.501315][ T11] dump_backtrace+0x1c4/0x1f0 [ 58.502253][ T11] show_stack+0x2c/0x3c [ 58.503028][ T11] __dump_stack+0x30/0x40 [ 58.503850][ T11] dump_stack_lvl+0xf4/0x15c [ 58.504727][ T11] dump_stack+0x1c/0x5c [ 58.505475][ T11] dump_header+0xc0/0x724 [ 58.506263][ T11] oom_kill_process+0x35c/0x660 [ 58.507134][ T11] out_of_memory+0xbf0/0xf70 [ 58.507973][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.508938][ T11] try_charge_memcg+0xa4c/0x1390 [ 58.509823][ T11] charge_memcg+0xa4/0x1f0 [ 58.510612][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.511696][ T11] __read_swap_cache_async+0x378/0x688 [ 58.512632][ T11] swap_cluster_readahead+0x6c0/0x818 [ 58.513579][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 58.514492][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 58.515336][ T11] shmem_file_read_iter+0x210/0x954 [ 58.516213][ T11] do_iter_read+0x4d4/0x8b4 [ 58.517031][ T11] vfs_iter_read+0x88/0xac [ 58.517824][ T11] loop_process_work+0xbf0/0x200c [ 58.518720][ T11] loop_workfn+0x48/0x58 [ 58.519455][ T11] process_one_work+0x7e4/0x13bc [ 58.520331][ T11] worker_thread+0x8cc/0xfe8 [ 58.521171][ T11] kthread+0x254/0x2e0 [ 58.521907][ T11] ret_from_fork+0x10/0x20 [ 58.524993][ T11] memory: usage 96kB, limit 96kB, failcnt 150964 [ 58.526062][ T11] memory+swap: usage 2436kB, limit 9007199254740988kB, failcnt 0 [ 58.527316][ T11] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 58.528513][ T11] Memory cgroup stats for /syz0/test: [ 58.528591][ T11] anon 4096 [ 58.528591][ T11] file 57344 [ 58.528591][ T11] kernel 28672 [ 58.528591][ T11] kernel_stack 0 [ 58.528591][ T11] pagetables 0 [ 58.528591][ T11] sec_pagetables 0 [ 58.528591][ T11] percpu 0 [ 58.528591][ T11] sock 0 [ 58.528591][ T11] vmalloc 0 [ 58.528591][ T11] shmem 45056 [ 58.528591][ T11] zswap 0 [ 58.528591][ T11] zswapped 0 [ 58.528591][ T11] file_mapped 0 [ 58.528591][ T11] file_dirty 0 [ 58.528591][ T11] file_writeback 0 [ 58.528591][ T11] swapcached 49700864 [ 58.528591][ T11] anon_thp 0 [ 58.528591][ T11] file_thp 0 [ 58.528591][ T11] shmem_thp 0 [ 58.528591][ T11] inactive_anon 40960 [ 58.528591][ T11] active_anon 16384 [ 58.528591][ T11] inactive_file 0 [ 58.528591][ T11] active_file 12288 [ 58.528591][ T11] unevictable 0 [ 58.528591][ T11] slab_reclaimable 14048 [ 58.528591][ T11] slab_unreclaimable 5840 [ 58.528591][ T11] slab 19888 [ 58.544541][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.29,pid=4520,uid=0 [ 58.547089][ T11] Memory cgroup out of memory: Killed process 4520 (syz.0.29) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 58.559122][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.561646][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 58.563040][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.564717][ T39] Workqueue: loop0 loop_rootcg_workfn [ 58.565822][ T39] Call trace: [ 58.566467][ T39] dump_backtrace+0x1c4/0x1f0 [ 58.567362][ T39] show_stack+0x2c/0x3c [ 58.568184][ T39] __dump_stack+0x30/0x40 [ 58.569032][ T39] dump_stack_lvl+0xf4/0x15c [ 58.569890][ T39] dump_stack+0x1c/0x5c [ 58.570636][ T39] dump_header+0xc0/0x724 [ 58.571420][ T39] out_of_memory+0xc78/0xf70 [ 58.572241][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.573209][ T39] try_charge_memcg+0xa4c/0x1390 [ 58.574068][ T39] charge_memcg+0xa4/0x1f0 [ 58.574848][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.575928][ T39] __read_swap_cache_async+0x378/0x688 [ 58.576913][ T39] swap_cluster_readahead+0x6c0/0x818 [ 58.577906][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 58.578827][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 58.579820][ T39] shmem_file_read_iter+0x210/0x954 [ 58.580845][ T39] do_iter_read+0x4d4/0x8b4 [ 58.581750][ T39] vfs_iter_read+0x88/0xac [ 58.582569][ T39] loop_process_work+0xbf0/0x200c [ 58.583505][ T39] loop_rootcg_workfn+0x28/0x38 [ 58.584402][ T39] process_one_work+0x7e4/0x13bc [ 58.585318][ T39] worker_thread+0x8cc/0xfe8 [ 58.586152][ T39] kthread+0x254/0x2e0 [ 58.586919][ T39] ret_from_fork+0x10/0x20 [ 58.588932][ T39] memory: usage 96kB, limit 96kB, failcnt 150995 [ 58.590051][ T39] memory+swap: usage 2172kB, limit 9007199254740988kB, failcnt 0 [ 58.591433][ T39] kmem: usage 20kB, limit 9007199254740988kB, failcnt 0 [ 58.592671][ T39] Memory cgroup stats for /syz0/test: [ 58.592747][ T39] anon 0 [ 58.592747][ T39] file 77824 [ 58.592747][ T39] kernel 20480 [ 58.592747][ T39] kernel_stack 0 [ 58.592747][ T39] pagetables 0 [ 58.592747][ T39] sec_pagetables 0 [ 58.592747][ T39] percpu 0 [ 58.592747][ T39] sock 0 [ 58.592747][ T39] vmalloc 0 [ 58.592747][ T39] shmem 73728 [ 58.592747][ T39] zswap 0 [ 58.592747][ T39] zswapped 0 [ 58.592747][ T39] file_mapped 0 [ 58.592747][ T39] file_dirty 0 [ 58.592747][ T39] file_writeback 0 [ 58.592747][ T39] swapcached 49709056 [ 58.592747][ T39] anon_thp 0 [ 58.592747][ T39] file_thp 0 [ 58.592747][ T39] shmem_thp 0 [ 58.592747][ T39] inactive_anon 49152 [ 58.592747][ T39] active_anon 24576 [ 58.592747][ T39] inactive_file 0 [ 58.592747][ T39] active_file 4096 [ 58.592747][ T39] unevictable 0 [ 58.592747][ T39] slab_reclaimable 15208 [ 58.592747][ T39] slab_unreclaimable 3896 [ 58.592747][ T39] slab 19104 [ 58.611042][ T39] Out of memory and no killable processes... [ 58.612403][ C0] blk_print_req_error: 16 callbacks suppressed [ 58.612420][ C0] I/O error, dev loop0, sector 3360 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 58.619436][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.621899][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 58.623040][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.624767][ T11] Workqueue: loop0 loop_rootcg_workfn [ 58.625701][ T11] Call trace: [ 58.626241][ T11] dump_backtrace+0x1c4/0x1f0 [ 58.627028][ T11] show_stack+0x2c/0x3c [ 58.627704][ T11] __dump_stack+0x30/0x40 [ 58.628500][ T11] dump_stack_lvl+0xf4/0x15c [ 58.629366][ T11] dump_stack+0x1c/0x5c [ 58.630131][ T11] dump_header+0xc0/0x724 [ 58.630915][ T11] oom_kill_process+0x35c/0x660 [ 58.631771][ T11] out_of_memory+0xbf0/0xf70 [ 58.632570][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.633560][ T11] try_charge_memcg+0xa4c/0x1390 [ 58.634459][ T11] charge_memcg+0xa4/0x1f0 [ 58.635250][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.636333][ T11] __read_swap_cache_async+0x378/0x688 [ 58.637347][ T11] swap_cluster_readahead+0x6c0/0x818 [ 58.638336][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 58.639240][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 58.640184][ T11] shmem_file_read_iter+0x210/0x954 [ 58.641106][ T11] do_iter_read+0x4d4/0x8b4 [ 58.641920][ T11] vfs_iter_read+0x88/0xac [ 58.642721][ T11] loop_process_work+0xbf0/0x200c [ 58.643573][ T11] loop_rootcg_workfn+0x28/0x38 [ 58.644423][ T11] process_one_work+0x7e4/0x13bc [ 58.645293][ T11] worker_thread+0x8cc/0xfe8 [ 58.646117][ T11] kthread+0x254/0x2e0 [ 58.646827][ T11] ret_from_fork+0x10/0x20 [ 58.647696][ T11] memory: usage 88kB, limit 96kB, failcnt 151622 [ 58.649044][ T11] memory+swap: usage 3804kB, limit 9007199254740988kB, failcnt 0 [ 58.650452][ T11] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 58.651631][ T11] Memory cgroup stats for /syz0/test: [ 58.651704][ T11] anon 16384 [ 58.651704][ T11] file 4096 [ 58.651704][ T11] kernel 28672 [ 58.651704][ T11] kernel_stack 0 [ 58.651704][ T11] pagetables 8192 [ 58.651704][ T11] sec_pagetables 0 [ 58.651704][ T11] percpu 0 [ 58.651704][ T11] sock 0 [ 58.651704][ T11] vmalloc 0 [ 58.651704][ T11] shmem 0 [ 58.651704][ T11] zswap 0 [ 58.651704][ T11] zswapped 0 [ 58.651704][ T11] file_mapped 0 [ 58.651704][ T11] file_dirty 0 [ 58.651704][ T11] file_writeback 0 [ 58.651704][ T11] swapcached 52195328 [ 58.651704][ T11] anon_thp 0 [ 58.651704][ T11] file_thp 0 [ 58.651704][ T11] shmem_thp 0 [ 58.651704][ T11] inactive_anon 0 [ 58.651704][ T11] active_anon 8192 [ 58.651704][ T11] inactive_file 0 [ 58.651704][ T11] active_file 4096 [ 58.651704][ T11] unevictable 0 [ 58.651704][ T11] slab_reclaimable 8848 [ 58.651704][ T11] slab_unreclaimable 5168 [ 58.651704][ T11] slab 14016 [ 58.667474][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.30,pid=4521,uid=0 [ 58.670132][ T11] Memory cgroup out of memory: Killed process 4521 (syz.0.30) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 58.674578][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.676722][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 58.677895][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.679647][ T11] Workqueue: loop0 loop_rootcg_workfn [ 58.680587][ T11] Call trace: [ 58.681155][ T11] dump_backtrace+0x1c4/0x1f0 [ 58.681964][ T11] show_stack+0x2c/0x3c [ 58.682701][ T11] __dump_stack+0x30/0x40 [ 58.683476][ T11] dump_stack_lvl+0xf4/0x15c [ 58.684275][ T11] dump_stack+0x1c/0x5c [ 58.685006][ T11] dump_header+0xc0/0x724 [ 58.685742][ T11] out_of_memory+0xc78/0xf70 [ 58.686546][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.687505][ T11] try_charge_memcg+0xa4c/0x1390 [ 58.688334][ T11] charge_memcg+0xa4/0x1f0 [ 58.689112][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.690176][ T11] __read_swap_cache_async+0x378/0x688 [ 58.691123][ T11] swap_cluster_readahead+0x6c0/0x818 [ 58.692086][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 58.693004][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 58.693923][ T11] shmem_file_read_iter+0x210/0x954 [ 58.694821][ T11] do_iter_read+0x4d4/0x8b4 [ 58.695584][ T11] vfs_iter_read+0x88/0xac [ 58.696374][ T11] loop_process_work+0xbf0/0x200c [ 58.697242][ T11] loop_rootcg_workfn+0x28/0x38 [ 58.698058][ T11] process_one_work+0x7e4/0x13bc [ 58.698917][ T11] worker_thread+0x8cc/0xfe8 [ 58.699740][ T11] kthread+0x254/0x2e0 [ 58.700458][ T11] ret_from_fork+0x10/0x20 [ 58.701333][ T11] memory: usage 36kB, limit 96kB, failcnt 152085 [ 58.702398][ T11] memory+swap: usage 2104kB, limit 9007199254740988kB, failcnt 0 [ 58.703702][ T11] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 58.704857][ T11] Memory cgroup stats for /syz0/test: [ 58.704937][ T11] anon 0 [ 58.704937][ T11] file 8192 [ 58.704937][ T11] kernel 28672 [ 58.704937][ T11] kernel_stack 0 [ 58.704937][ T11] pagetables 0 [ 58.704937][ T11] sec_pagetables 0 [ 58.704937][ T11] percpu 0 [ 58.704937][ T11] sock 0 [ 58.704937][ T11] vmalloc 0 [ 58.704937][ T11] shmem 4096 [ 58.704937][ T11] zswap 0 [ 58.704937][ T11] zswapped 0 [ 58.704937][ T11] file_mapped 0 [ 58.704937][ T11] file_dirty 0 [ 58.704937][ T11] file_writeback 0 [ 58.704937][ T11] swapcached 53669888 [ 58.704937][ T11] anon_thp 0 [ 58.704937][ T11] file_thp 0 [ 58.704937][ T11] shmem_thp 0 [ 58.704937][ T11] inactive_anon 4096 [ 58.704937][ T11] active_anon 0 [ 58.704937][ T11] inactive_file 0 [ 58.704937][ T11] active_file 4096 [ 58.704937][ T11] unevictable 0 [ 58.704937][ T11] slab_reclaimable 14872 [ 58.704937][ T11] slab_unreclaimable 5192 [ 58.704937][ T11] slab 20064 [ 58.721108][ T11] Out of memory and no killable processes... [ 58.722135][ C1] I/O error, dev loop0, sector 512 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 58.799125][ T4522] loop0: detected capacity change from 0 to 4096 [ 58.803639][ T79] Memory cgroup out of memory: Killed process 4522 (syz.0.31) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 58.813403][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.815754][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 58.817194][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.819199][ T39] Workqueue: loop0 loop_rootcg_workfn [ 58.820295][ T39] Call trace: [ 58.820960][ T39] dump_backtrace+0x1c4/0x1f0 [ 58.821951][ T39] show_stack+0x2c/0x3c [ 58.822763][ T39] __dump_stack+0x30/0x40 [ 58.823633][ T39] dump_stack_lvl+0xf4/0x15c [ 58.824528][ T39] dump_stack+0x1c/0x5c [ 58.825330][ T39] dump_header+0xc0/0x724 [ 58.826140][ T39] out_of_memory+0xc78/0xf70 [ 58.826994][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.828022][ T39] try_charge_memcg+0xa4c/0x1390 [ 58.828953][ T39] charge_memcg+0xa4/0x1f0 [ 58.829801][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.830950][ T39] __read_swap_cache_async+0x378/0x688 [ 58.831994][ T39] swap_cluster_readahead+0x6c0/0x818 [ 58.832999][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 58.833954][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 58.834923][ T39] shmem_file_read_iter+0x210/0x954 [ 58.835867][ T39] do_iter_read+0x4d4/0x8b4 [ 58.836690][ T39] vfs_iter_read+0x88/0xac [ 58.837518][ T39] loop_process_work+0xbf0/0x200c [ 58.838437][ T39] loop_rootcg_workfn+0x28/0x38 [ 58.839294][ T39] process_one_work+0x7e4/0x13bc [ 58.840208][ T39] worker_thread+0x8cc/0xfe8 [ 58.841071][ T39] kthread+0x254/0x2e0 [ 58.841832][ T39] ret_from_fork+0x10/0x20 [ 58.842811][ T39] memory: usage 96kB, limit 96kB, failcnt 153184 [ 58.843920][ T39] memory+swap: usage 2304kB, limit 9007199254740988kB, failcnt 0 [ 58.845340][ T39] kmem: usage 20kB, limit 9007199254740988kB, failcnt 0 [ 58.846485][ T39] Memory cgroup stats for /syz0/test: [ 58.846566][ T39] anon 0 [ 58.846566][ T39] file 77824 [ 58.846566][ T39] kernel 20480 [ 58.846566][ T39] kernel_stack 0 [ 58.846566][ T39] pagetables 0 [ 58.846566][ T39] sec_pagetables 0 [ 58.846566][ T39] percpu 0 [ 58.846566][ T39] sock 0 [ 58.846566][ T39] vmalloc 0 [ 58.846566][ T39] shmem 77824 [ 58.846566][ T39] zswap 0 [ 58.846566][ T39] zswapped 0 [ 58.846566][ T39] file_mapped 0 [ 58.846566][ T39] file_dirty 0 [ 58.846566][ T39] file_writeback 0 [ 58.846566][ T39] swapcached 57585664 [ 58.846566][ T39] anon_thp 0 [ 58.846566][ T39] file_thp 0 [ 58.846566][ T39] shmem_thp 0 [ 58.846566][ T39] inactive_anon 73728 [ 58.846566][ T39] active_anon 4096 [ 58.846566][ T39] inactive_file 0 [ 58.846566][ T39] active_file 0 [ 58.846566][ T39] unevictable 0 [ 58.846566][ T39] slab_reclaimable 7176 [ 58.846566][ T39] slab_unreclaimable 4544 [ 58.846566][ T39] slab 11720 [ 58.864077][ T39] Out of memory and no killable processes... [ 58.865321][ C1] I/O error, dev loop0, sector 120 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 58.947828][ T4523] __ntfs_error: 43 callbacks suppressed [ 58.947825][ T39] Memory cgroup out of memory: Killed process 4523 (syz.0.32) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 58.947840][ T4523] ntfs: (device loop0): check_mft_mirror(): Failed to read $MFTMirr. [ 58.953559][ T4523] ntfs: (device loop0): load_system_files(): $MFTMirr does not match $MFT. Mounting read-only. Run ntfsfix and/or chkdsk. [ 58.958225][ T4523] ntfs: (device loop0): load_and_init_upcase(): Failed to load $UpCase from the volume. Using default. [ 58.960784][ T4523] ntfs: (device loop0): map_mft_record(): Failed with error code 4. [ 58.962324][ T4523] ntfs: (device loop0): ntfs_read_locked_inode(): Failed with error code -4. Marking corrupt inode 0x4 as bad. Run chkdsk. [ 58.964575][ T4523] ntfs: (device loop0): load_and_init_attrdef(): Failed to initialize attribute definition table. [ 58.966631][ T4523] ntfs: (device loop0): ntfs_fill_super(): Failed to load system files. [ 58.977326][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 58.980400][ T39] CPU: 1 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 58.981549][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 58.983395][ T39] Workqueue: loop0 loop_rootcg_workfn [ 58.984434][ T39] Call trace: [ 58.985059][ T39] dump_backtrace+0x1c4/0x1f0 [ 58.985905][ T39] show_stack+0x2c/0x3c [ 58.986697][ T39] __dump_stack+0x30/0x40 [ 58.987462][ T39] dump_stack_lvl+0xf4/0x15c [ 58.988282][ T39] dump_stack+0x1c/0x5c [ 58.989008][ T39] dump_header+0xc0/0x724 [ 58.989807][ T39] out_of_memory+0xc78/0xf70 [ 58.990567][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 58.991567][ T39] try_charge_memcg+0xa4c/0x1390 [ 58.992528][ T39] charge_memcg+0xa4/0x1f0 [ 58.993378][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 58.994558][ T39] __read_swap_cache_async+0x378/0x688 [ 58.995632][ T39] swap_cluster_readahead+0x6c0/0x818 [ 58.996658][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 58.997642][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 58.998585][ T39] shmem_file_read_iter+0x210/0x954 [ 58.999508][ T39] do_iter_read+0x4d4/0x8b4 [ 59.000291][ T39] vfs_iter_read+0x88/0xac [ 59.001100][ T39] loop_process_work+0xbf0/0x200c [ 59.002022][ T39] loop_rootcg_workfn+0x28/0x38 [ 59.002920][ T39] process_one_work+0x7e4/0x13bc [ 59.003767][ T39] worker_thread+0x8cc/0xfe8 [ 59.004573][ T39] kthread+0x254/0x2e0 [ 59.005293][ T39] ret_from_fork+0x10/0x20 [ 59.006804][ T39] memory: usage 88kB, limit 96kB, failcnt 154712 [ 59.007919][ T39] memory+swap: usage 2548kB, limit 9007199254740988kB, failcnt 0 [ 59.009220][ T39] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 59.010414][ T39] Memory cgroup stats for /syz0/test: [ 59.010492][ T39] anon 24576 [ 59.010492][ T39] file 0 [ 59.010492][ T39] kernel 28672 [ 59.010492][ T39] kernel_stack 0 [ 59.010492][ T39] pagetables 8192 [ 59.010492][ T39] sec_pagetables 0 [ 59.010492][ T39] percpu 0 [ 59.010492][ T39] sock 0 [ 59.010492][ T39] vmalloc 0 [ 59.010492][ T39] shmem 0 [ 59.010492][ T39] zswap 0 [ 59.010492][ T39] zswapped 0 [ 59.010492][ T39] file_mapped 0 [ 59.010492][ T39] file_dirty 0 [ 59.010492][ T39] file_writeback 0 [ 59.010492][ T39] swapcached 62652416 [ 59.010492][ T39] anon_thp 0 [ 59.010492][ T39] file_thp 0 [ 59.010492][ T39] shmem_thp 0 [ 59.010492][ T39] inactive_anon 0 [ 59.010492][ T39] active_anon 57344 [ 59.010492][ T39] inactive_file 0 [ 59.010492][ T39] active_file 0 [ 59.010492][ T39] unevictable 0 [ 59.010492][ T39] slab_reclaimable 10008 [ 59.010492][ T39] slab_unreclaimable 3896 [ 59.010492][ T39] slab 13904 [ 59.026861][ T39] Out of memory and no killable processes... [ 59.028138][ C1] I/O error, dev loop0, sector 3144 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 59.080526][ T39] Memory cgroup out of memory: Killed process 4524 (syz.0.33) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 59.080529][ T4524] ntfs: (device loop0): check_mft_mirror(): Failed to read $MFTMirr. [ 59.084558][ T4524] ntfs: (device loop0): load_system_files(): $MFTMirr does not match $MFT. Mounting read-only. Run ntfsfix and/or chkdsk. [ 59.086834][ T4524] ntfs: (device loop0): map_mft_record(): Failed with error code 4. [ 59.090444][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.092939][ T39] CPU: 1 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 59.094200][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.095882][ T39] Workqueue: loop0 loop_rootcg_workfn [ 59.096804][ T39] Call trace: [ 59.097326][ T39] dump_backtrace+0x1c4/0x1f0 [ 59.098153][ T39] show_stack+0x2c/0x3c [ 59.098939][ T39] __dump_stack+0x30/0x40 [ 59.099733][ T39] dump_stack_lvl+0xf4/0x15c [ 59.100536][ T39] dump_stack+0x1c/0x5c [ 59.101247][ T39] dump_header+0xc0/0x724 [ 59.101972][ T39] out_of_memory+0xc78/0xf70 [ 59.102776][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.103759][ T39] try_charge_memcg+0xa4c/0x1390 [ 59.104621][ T39] charge_memcg+0xa4/0x1f0 [ 59.105386][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.106439][ T39] __read_swap_cache_async+0x378/0x688 [ 59.107375][ T39] swap_cluster_readahead+0x6c0/0x818 [ 59.108280][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 59.109188][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 59.110096][ T39] shmem_file_read_iter+0x210/0x954 [ 59.110969][ T39] do_iter_read+0x4d4/0x8b4 [ 59.111716][ T39] vfs_iter_read+0x88/0xac [ 59.112456][ T39] loop_process_work+0xbf0/0x200c [ 59.113301][ T39] loop_rootcg_workfn+0x28/0x38 [ 59.114155][ T39] process_one_work+0x7e4/0x13bc [ 59.114983][ T39] worker_thread+0x8cc/0xfe8 [ 59.115763][ T39] kthread+0x254/0x2e0 [ 59.116442][ T39] ret_from_fork+0x10/0x20 [ 59.117524][ T39] memory: usage 96kB, limit 96kB, failcnt 156032 [ 59.118983][ T39] memory+swap: usage 2256kB, limit 9007199254740988kB, failcnt 0 [ 59.120269][ T39] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 59.121380][ T39] Memory cgroup stats for /syz0/test: [ 59.121466][ T39] anon 0 [ 59.121466][ T39] file 57344 [ 59.121466][ T39] kernel 24576 [ 59.121466][ T39] kernel_stack 0 [ 59.121466][ T39] pagetables 0 [ 59.121466][ T39] sec_pagetables 0 [ 59.121466][ T39] percpu 0 [ 59.121466][ T39] sock 0 [ 59.121466][ T39] vmalloc 0 [ 59.121466][ T39] shmem 53248 [ 59.121466][ T39] zswap 0 [ 59.121466][ T39] zswapped 0 [ 59.121466][ T39] file_mapped 0 [ 59.121466][ T39] file_dirty 0 [ 59.121466][ T39] file_writeback 0 [ 59.121466][ T39] swapcached 66228224 [ 59.121466][ T39] anon_thp 0 [ 59.121466][ T39] file_thp 0 [ 59.121466][ T39] shmem_thp 0 [ 59.121466][ T39] inactive_anon 32768 [ 59.121466][ T39] active_anon 20480 [ 59.121466][ T39] inactive_file 0 [ 59.121466][ T39] active_file 4096 [ 59.121466][ T39] unevictable 0 [ 59.121466][ T39] slab_reclaimable 20192 [ 59.121466][ T39] slab_unreclaimable 6816 [ 59.121466][ T39] slab 27008 [ 59.136645][ T39] Out of memory and no killable processes... [ 59.137621][ C1] I/O error, dev loop0, sector 3504 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 59.142070][ T39] Memory cgroup out of memory: Killed process 4525 (syz.0.34) total-vm:180036kB, anon-rss:1292kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:80kB oom_score_adj:1000 [ 59.211691][ T39] Memory cgroup out of memory: Killed process 4526 (syz.0.35) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 59.217964][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.220422][ T39] CPU: 1 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 59.221661][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.223243][ T39] Workqueue: loop0 loop_rootcg_workfn [ 59.224110][ T39] Call trace: [ 59.224641][ T39] dump_backtrace+0x1c4/0x1f0 [ 59.225395][ T39] show_stack+0x2c/0x3c [ 59.226042][ T39] __dump_stack+0x30/0x40 [ 59.226766][ T39] dump_stack_lvl+0xf4/0x15c [ 59.227544][ T39] dump_stack+0x1c/0x5c [ 59.228249][ T39] dump_header+0xc0/0x724 [ 59.229006][ T39] out_of_memory+0xc78/0xf70 [ 59.229803][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.230768][ T39] try_charge_memcg+0xa4c/0x1390 [ 59.231658][ T39] charge_memcg+0xa4/0x1f0 [ 59.232476][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.233589][ T39] __read_swap_cache_async+0x378/0x688 [ 59.234564][ T39] swap_cluster_readahead+0x6c0/0x818 [ 59.235480][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 59.236358][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 59.237263][ T39] shmem_file_read_iter+0x210/0x954 [ 59.238147][ T39] do_iter_read+0x4d4/0x8b4 [ 59.238964][ T39] vfs_iter_read+0x88/0xac [ 59.239796][ T39] loop_process_work+0xbf0/0x200c [ 59.240717][ T39] loop_rootcg_workfn+0x28/0x38 [ 59.241585][ T39] process_one_work+0x7e4/0x13bc [ 59.242489][ T39] worker_thread+0x8cc/0xfe8 [ 59.243305][ T39] kthread+0x254/0x2e0 [ 59.244050][ T39] ret_from_fork+0x10/0x20 [ 59.244940][ T39] memory: usage 88kB, limit 96kB, failcnt 157297 [ 59.246030][ T39] memory+swap: usage 2236kB, limit 9007199254740988kB, failcnt 0 [ 59.247313][ T39] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 59.248570][ T39] Memory cgroup stats for /syz0/test: [ 59.248634][ T39] anon 0 [ 59.248634][ T39] file 65536 [ 59.248634][ T39] kernel 24576 [ 59.248634][ T39] kernel_stack 0 [ 59.248634][ T39] pagetables 0 [ 59.248634][ T39] sec_pagetables 0 [ 59.248634][ T39] percpu 0 [ 59.248634][ T39] sock 0 [ 59.248634][ T39] vmalloc 0 [ 59.248634][ T39] shmem 61440 [ 59.248634][ T39] zswap 0 [ 59.248634][ T39] zswapped 0 [ 59.248634][ T39] file_mapped 0 [ 59.248634][ T39] file_dirty 0 [ 59.248634][ T39] file_writeback 0 [ 59.248634][ T39] swapcached 70680576 [ 59.248634][ T39] anon_thp 0 [ 59.248634][ T39] file_thp 0 [ 59.248634][ T39] shmem_thp 0 [ 59.248634][ T39] inactive_anon 24576 [ 59.248634][ T39] active_anon 36864 [ 59.248634][ T39] inactive_file 0 [ 59.248634][ T39] active_file 4096 [ 59.248634][ T39] unevictable 0 [ 59.248634][ T39] slab_reclaimable 18056 [ 59.248634][ T39] slab_unreclaimable 4544 [ 59.248634][ T39] slab 22600 [ 59.264021][ T39] Out of memory and no killable processes... [ 59.265007][ C1] I/O error, dev loop0, sector 3840 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 59.344539][ T4509] Memory cgroup out of memory: Killed process 4527 (syz.0.36) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 59.365045][ T4509] kworker/u4:7 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.367385][ T4509] CPU: 0 PID: 4509 Comm: kworker/u4:7 Not tainted syzkaller #0 [ 59.368716][ T4509] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.370491][ T4509] Workqueue: loop0 loop_rootcg_workfn [ 59.371623][ T4509] Call trace: [ 59.372311][ T4509] dump_backtrace+0x1c4/0x1f0 [ 59.373227][ T4509] show_stack+0x2c/0x3c [ 59.374062][ T4509] __dump_stack+0x30/0x40 [ 59.374849][ T4509] dump_stack_lvl+0xf4/0x15c [ 59.375706][ T4509] dump_stack+0x1c/0x5c [ 59.376504][ T4509] dump_header+0xc0/0x724 [ 59.377310][ T4509] out_of_memory+0xc78/0xf70 [ 59.378153][ T4509] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.379178][ T4509] try_charge_memcg+0xa4c/0x1390 [ 59.380135][ T4509] charge_memcg+0xa4/0x1f0 [ 59.380935][ T4509] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.382040][ T4509] __read_swap_cache_async+0x378/0x688 [ 59.383046][ T4509] swap_cluster_readahead+0x6c0/0x818 [ 59.384048][ T4509] shmem_swapin_folio+0x5c4/0x1170 [ 59.384920][ T4509] shmem_get_folio_gfp+0x274/0x2038 [ 59.385832][ T4509] shmem_file_read_iter+0x210/0x954 [ 59.386773][ T4509] do_iter_read+0x4d4/0x8b4 [ 59.387584][ T4509] vfs_iter_read+0x88/0xac [ 59.388377][ T4509] loop_process_work+0xbf0/0x200c [ 59.389276][ T4509] loop_rootcg_workfn+0x28/0x38 [ 59.390161][ T4509] process_one_work+0x7e4/0x13bc [ 59.391044][ T4509] worker_thread+0x8cc/0xfe8 [ 59.391902][ T4509] kthread+0x254/0x2e0 [ 59.392667][ T4509] ret_from_fork+0x10/0x20 [ 59.394219][ T4509] memory: usage 96kB, limit 96kB, failcnt 158831 [ 59.395350][ T4509] memory+swap: usage 2212kB, limit 9007199254740988kB, failcnt 0 [ 59.396654][ T4509] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 59.397757][ T4509] Memory cgroup stats for /syz0/test: [ 59.397840][ T4509] anon 0 [ 59.397840][ T4509] file 65536 [ 59.397840][ T4509] kernel 28672 [ 59.397840][ T4509] kernel_stack 0 [ 59.397840][ T4509] pagetables 0 [ 59.397840][ T4509] sec_pagetables 0 [ 59.397840][ T4509] percpu 0 [ 59.397840][ T4509] sock 0 [ 59.397840][ T4509] vmalloc 0 [ 59.397840][ T4509] shmem 61440 [ 59.397840][ T4509] zswap 0 [ 59.397840][ T4509] zswapped 0 [ 59.397840][ T4509] file_mapped 0 [ 59.397840][ T4509] file_dirty 0 [ 59.397840][ T4509] file_writeback 0 [ 59.397840][ T4509] swapcached 74924032 [ 59.397840][ T4509] anon_thp 0 [ 59.397840][ T4509] file_thp 0 [ 59.397840][ T4509] shmem_thp 0 [ 59.397840][ T4509] inactive_anon 36864 [ 59.397840][ T4509] active_anon 20480 [ 59.397840][ T4509] inactive_file 0 [ 59.397840][ T4509] active_file 8192 [ 59.397840][ T4509] unevictable 0 [ 59.397840][ T4509] slab_reclaimable 22544 [ 59.397840][ T4509] slab_unreclaimable 3896 [ 59.397840][ T4509] slab 26440 1970/01/01 00:00:59 executed programs: 22 [ 59.417644][ T4509] Out of memory and no killable processes... [ 59.418939][ C0] I/O error, dev loop0, sector 1024 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 59.422832][ T4509] kworker/u4:7 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.424963][ T4509] CPU: 0 PID: 4509 Comm: kworker/u4:7 Not tainted syzkaller #0 [ 59.426278][ T4509] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.427966][ T4509] Workqueue: loop0 loop_rootcg_workfn [ 59.428967][ T4509] Call trace: [ 59.429594][ T4509] dump_backtrace+0x1c4/0x1f0 [ 59.430481][ T4509] show_stack+0x2c/0x3c [ 59.431279][ T4509] __dump_stack+0x30/0x40 [ 59.432049][ T4509] dump_stack_lvl+0xf4/0x15c [ 59.432878][ T4509] dump_stack+0x1c/0x5c [ 59.433633][ T4509] dump_header+0xc0/0x724 [ 59.434443][ T4509] out_of_memory+0xc78/0xf70 [ 59.435290][ T4509] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.436297][ T4509] try_charge_memcg+0xa4c/0x1390 [ 59.437182][ T4509] charge_memcg+0xa4/0x1f0 [ 59.437981][ T4509] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.439084][ T4509] __read_swap_cache_async+0x378/0x688 [ 59.440011][ T4509] swap_cluster_readahead+0x6c0/0x818 [ 59.440977][ T4509] shmem_swapin_folio+0x5c4/0x1170 [ 59.441911][ T4509] shmem_get_folio_gfp+0x274/0x2038 [ 59.442872][ T4509] shmem_file_read_iter+0x210/0x954 [ 59.443837][ T4509] do_iter_read+0x4d4/0x8b4 [ 59.444680][ T4509] vfs_iter_read+0x88/0xac [ 59.445505][ T4509] loop_process_work+0xbf0/0x200c [ 59.446438][ T4509] loop_rootcg_workfn+0x28/0x38 [ 59.447310][ T4509] process_one_work+0x7e4/0x13bc [ 59.448179][ T4509] worker_thread+0x8cc/0xfe8 [ 59.448994][ T4509] kthread+0x254/0x2e0 [ 59.449711][ T4509] ret_from_fork+0x10/0x20 [ 59.450983][ T4509] memory: usage 44kB, limit 96kB, failcnt 159133 [ 59.451988][ T4509] memory+swap: usage 2892kB, limit 9007199254740988kB, failcnt 0 [ 59.453267][ T4509] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 59.454381][ T4509] Memory cgroup stats for /syz0/test: [ 59.454471][ T4509] anon 28672 [ 59.454471][ T4509] file 24576 [ 59.454471][ T4509] kernel 24576 [ 59.454471][ T4509] kernel_stack 0 [ 59.454471][ T4509] pagetables 8192 [ 59.454471][ T4509] sec_pagetables 0 [ 59.454471][ T4509] percpu 0 [ 59.454471][ T4509] sock 0 [ 59.454471][ T4509] vmalloc 0 [ 59.454471][ T4509] shmem 20480 [ 59.454471][ T4509] zswap 0 [ 59.454471][ T4509] zswapped 0 [ 59.454471][ T4509] file_mapped 0 [ 59.454471][ T4509] file_dirty 0 [ 59.454471][ T4509] file_writeback 0 [ 59.454471][ T4509] swapcached 76255232 [ 59.454471][ T4509] anon_thp 0 [ 59.454471][ T4509] file_thp 0 [ 59.454471][ T4509] shmem_thp 0 [ 59.454471][ T4509] inactive_anon 32768 [ 59.454471][ T4509] active_anon 36864 [ 59.454471][ T4509] inactive_file 0 [ 59.454471][ T4509] active_file 0 [ 59.454471][ T4509] unevictable 0 [ 59.454471][ T4509] slab_reclaimable 8464 [ 59.454471][ T4509] slab_unreclaimable 2272 [ 59.454471][ T4509] slab 10736 [ 59.470798][ T4509] Out of memory and no killable processes... [ 59.471805][ C0] I/O error, dev loop0, sector 56 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 59.489989][ T4528] set_capacity_and_notify: 4 callbacks suppressed [ 59.489998][ T4528] loop0: detected capacity change from 0 to 4096 [ 59.496702][ T11] oom_kill_process: 6 callbacks suppressed [ 59.496710][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.500569][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 59.501879][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.503783][ T11] Workqueue: loop0 loop_rootcg_workfn [ 59.504820][ T11] Call trace: [ 59.505434][ T11] dump_backtrace+0x1c4/0x1f0 [ 59.506315][ T11] show_stack+0x2c/0x3c [ 59.507076][ T11] __dump_stack+0x30/0x40 [ 59.507857][ T11] dump_stack_lvl+0xf4/0x15c [ 59.508769][ T11] dump_stack+0x1c/0x5c [ 59.509622][ T11] dump_header+0xc0/0x724 [ 59.510475][ T11] oom_kill_process+0x35c/0x660 [ 59.511457][ T11] out_of_memory+0xbf0/0xf70 [ 59.512284][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.513289][ T11] try_charge_memcg+0xa4c/0x1390 [ 59.514173][ T11] charge_memcg+0xa4/0x1f0 [ 59.514978][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.516056][ T11] __read_swap_cache_async+0x378/0x688 [ 59.516992][ T11] swap_cluster_readahead+0x6c0/0x818 [ 59.517913][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 59.518851][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 59.519746][ T11] shmem_file_read_iter+0x210/0x954 [ 59.520625][ T11] do_iter_read+0x4d4/0x8b4 [ 59.521382][ T11] vfs_iter_read+0x88/0xac [ 59.522157][ T11] loop_process_work+0xbf0/0x200c [ 59.523045][ T11] loop_rootcg_workfn+0x28/0x38 [ 59.523880][ T11] process_one_work+0x7e4/0x13bc [ 59.524739][ T11] worker_thread+0x8cc/0xfe8 [ 59.525526][ T11] kthread+0x254/0x2e0 [ 59.526227][ T11] ret_from_fork+0x10/0x20 [ 59.527987][ T11] memory: usage 88kB, limit 96kB, failcnt 159956 [ 59.529028][ T11] memory+swap: usage 2280kB, limit 9007199254740988kB, failcnt 0 [ 59.530224][ T11] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 59.531429][ T11] Memory cgroup stats for /syz0/test: [ 59.531511][ T11] anon 0 [ 59.531511][ T11] file 53248 [ 59.531511][ T11] kernel 24576 [ 59.531511][ T11] kernel_stack 0 [ 59.531511][ T11] pagetables 0 [ 59.531511][ T11] sec_pagetables 0 [ 59.531511][ T11] percpu 0 [ 59.531511][ T11] sock 0 [ 59.531511][ T11] vmalloc 0 [ 59.531511][ T11] shmem 40960 [ 59.531511][ T11] zswap 0 [ 59.531511][ T11] zswapped 0 [ 59.531511][ T11] file_mapped 0 [ 59.531511][ T11] file_dirty 0 [ 59.531511][ T11] file_writeback 0 [ 59.531511][ T11] swapcached 78921728 [ 59.531511][ T11] anon_thp 0 [ 59.531511][ T11] file_thp 0 [ 59.531511][ T11] shmem_thp 0 [ 59.531511][ T11] inactive_anon 20480 [ 59.531511][ T11] active_anon 20480 [ 59.531511][ T11] inactive_file 0 [ 59.531511][ T11] active_file 12288 [ 59.531511][ T11] unevictable 0 [ 59.531511][ T11] slab_reclaimable 19280 [ 59.531511][ T11] slab_unreclaimable 8112 [ 59.531511][ T11] slab 27392 [ 59.546898][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.37,pid=4528,uid=0 [ 59.549506][ T11] Memory cgroup out of memory: Killed process 4528 (syz.0.37) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 59.554853][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.556966][ T11] CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 59.558258][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.559984][ T11] Workqueue: loop0 loop_rootcg_workfn [ 59.560952][ T11] Call trace: [ 59.561512][ T11] dump_backtrace+0x1c4/0x1f0 [ 59.562340][ T11] show_stack+0x2c/0x3c [ 59.563052][ T11] __dump_stack+0x30/0x40 [ 59.563808][ T11] dump_stack_lvl+0xf4/0x15c [ 59.564599][ T11] dump_stack+0x1c/0x5c [ 59.565357][ T11] dump_header+0xc0/0x724 [ 59.566128][ T11] out_of_memory+0xc78/0xf70 [ 59.566953][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.567905][ T11] try_charge_memcg+0xa4c/0x1390 [ 59.568784][ T11] charge_memcg+0xa4/0x1f0 [ 59.569552][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.570593][ T11] __read_swap_cache_async+0x378/0x688 [ 59.571504][ T11] swap_cluster_readahead+0x6c0/0x818 [ 59.572447][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 59.573317][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 59.574230][ T11] shmem_file_read_iter+0x210/0x954 [ 59.575162][ T11] do_iter_read+0x4d4/0x8b4 [ 59.575939][ T11] vfs_iter_read+0x88/0xac [ 59.576686][ T11] loop_process_work+0xbf0/0x200c [ 59.577537][ T11] loop_rootcg_workfn+0x28/0x38 [ 59.578362][ T11] process_one_work+0x7e4/0x13bc [ 59.579209][ T11] worker_thread+0x8cc/0xfe8 [ 59.579995][ T11] kthread+0x254/0x2e0 [ 59.580674][ T11] ret_from_fork+0x10/0x20 [ 59.581778][ T11] memory: usage 96kB, limit 96kB, failcnt 159983 [ 59.582910][ T11] memory+swap: usage 2272kB, limit 9007199254740988kB, failcnt 0 [ 59.584157][ T11] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 59.585260][ T11] Memory cgroup stats for /syz0/test: [ 59.585336][ T11] anon 0 [ 59.585336][ T11] file 61440 [ 59.585336][ T11] kernel 24576 [ 59.585336][ T11] kernel_stack 0 [ 59.585336][ T11] pagetables 0 [ 59.585336][ T11] sec_pagetables 0 [ 59.585336][ T11] percpu 0 [ 59.585336][ T11] sock 0 [ 59.585336][ T11] vmalloc 0 [ 59.585336][ T11] shmem 57344 [ 59.585336][ T11] zswap 0 [ 59.585336][ T11] zswapped 0 [ 59.585336][ T11] file_mapped 0 [ 59.585336][ T11] file_dirty 0 [ 59.585336][ T11] file_writeback 0 [ 59.585336][ T11] swapcached 78921728 [ 59.585336][ T11] anon_thp 0 [ 59.585336][ T11] file_thp 0 [ 59.585336][ T11] shmem_thp 0 [ 59.585336][ T11] inactive_anon 20480 [ 59.585336][ T11] active_anon 36864 [ 59.585336][ T11] inactive_file 0 [ 59.585336][ T11] active_file 16384 [ 59.585336][ T11] unevictable 0 [ 59.585336][ T11] slab_reclaimable 19512 [ 59.585336][ T11] slab_unreclaimable 3896 [ 59.585336][ T11] slab 23408 [ 59.601090][ T11] Out of memory and no killable processes... [ 59.602132][ C0] I/O error, dev loop0, sector 3696 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 [ 59.605156][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.607345][ T11] CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 59.608639][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.610489][ T11] Workqueue: loop0 loop_rootcg_workfn [ 59.611482][ T11] Call trace: [ 59.612045][ T11] dump_backtrace+0x1c4/0x1f0 [ 59.612836][ T11] show_stack+0x2c/0x3c [ 59.613541][ T11] __dump_stack+0x30/0x40 [ 59.614296][ T11] dump_stack_lvl+0xf4/0x15c [ 59.615090][ T11] dump_stack+0x1c/0x5c [ 59.615851][ T11] dump_header+0xc0/0x724 [ 59.616605][ T11] out_of_memory+0xc78/0xf70 [ 59.617404][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.618373][ T11] try_charge_memcg+0xa4c/0x1390 [ 59.619196][ T11] charge_memcg+0xa4/0x1f0 [ 59.619922][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.620927][ T11] __read_swap_cache_async+0x378/0x688 [ 59.621838][ T11] swap_cluster_readahead+0x6c0/0x818 [ 59.622729][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 59.623586][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 59.624466][ T11] shmem_file_read_iter+0x210/0x954 [ 59.625346][ T11] do_iter_read+0x4d4/0x8b4 [ 59.626094][ T11] vfs_iter_read+0x88/0xac [ 59.626871][ T11] loop_process_work+0xbf0/0x200c [ 59.627730][ T11] loop_rootcg_workfn+0x28/0x38 [ 59.628580][ T11] process_one_work+0x7e4/0x13bc [ 59.629425][ T11] worker_thread+0x8cc/0xfe8 [ 59.630264][ T11] kthread+0x254/0x2e0 [ 59.630945][ T11] ret_from_fork+0x10/0x20 [ 59.631798][ T11] memory: usage 84kB, limit 96kB, failcnt 160274 [ 59.632796][ T11] memory+swap: usage 2912kB, limit 9007199254740988kB, failcnt 0 [ 59.634054][ T11] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 59.635140][ T11] Memory cgroup stats for /syz0/test: [ 59.635207][ T11] anon 12288 [ 59.635207][ T11] file 4096 [ 59.635207][ T11] kernel 24576 [ 59.635207][ T11] kernel_stack 0 [ 59.635207][ T11] pagetables 8192 [ 59.635207][ T11] sec_pagetables 0 [ 59.635207][ T11] percpu 0 [ 59.635207][ T11] sock 0 [ 59.635207][ T11] vmalloc 0 [ 59.635207][ T11] shmem 0 [ 59.635207][ T11] zswap 0 [ 59.635207][ T11] zswapped 0 [ 59.635207][ T11] file_mapped 0 [ 59.635207][ T11] file_dirty 0 [ 59.635207][ T11] file_writeback 20480 [ 59.635207][ T11] swapcached 80056320 [ 59.635207][ T11] anon_thp 0 [ 59.635207][ T11] file_thp 0 [ 59.635207][ T11] shmem_thp 0 [ 59.635207][ T11] inactive_anon 0 [ 59.635207][ T11] active_anon 28672 [ 59.635207][ T11] inactive_file 0 [ 59.635207][ T11] active_file 4096 [ 59.635207][ T11] unevictable 0 [ 59.635207][ T11] slab_reclaimable 8464 [ 59.635207][ T11] slab_unreclaimable 2272 [ 59.635207][ T11] slab 10736 [ 59.650737][ T11] Out of memory and no killable processes... [ 59.651692][ C0] I/O error, dev loop0, sector 3696 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 59.653130][ C0] buffer_io_error: 6 callbacks suppressed [ 59.653140][ C0] Buffer I/O error on dev loop0, logical block 1848, async page read [ 59.667555][ T4529] loop0: detected capacity change from 0 to 4096 [ 59.680067][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.682330][ T11] CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 59.683515][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.685070][ T11] Workqueue: loop0 loop_workfn [ 59.685835][ T11] Call trace: [ 59.686351][ T11] dump_backtrace+0x1c4/0x1f0 [ 59.687123][ T11] show_stack+0x2c/0x3c [ 59.687787][ T11] __dump_stack+0x30/0x40 [ 59.688533][ T11] dump_stack_lvl+0xf4/0x15c [ 59.689339][ T11] dump_stack+0x1c/0x5c [ 59.690083][ T11] dump_header+0xc0/0x724 [ 59.690835][ T11] oom_kill_process+0x35c/0x660 [ 59.691694][ T11] out_of_memory+0xbf0/0xf70 [ 59.692532][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.693550][ T11] try_charge_memcg+0xa4c/0x1390 [ 59.694473][ T11] charge_memcg+0xa4/0x1f0 [ 59.695273][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.696369][ T11] __read_swap_cache_async+0x378/0x688 [ 59.697294][ T11] swap_cluster_readahead+0x6c0/0x818 [ 59.698234][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 59.699180][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 59.700101][ T11] shmem_file_read_iter+0x210/0x954 [ 59.701035][ T11] do_iter_read+0x4d4/0x8b4 [ 59.701804][ T11] vfs_iter_read+0x88/0xac [ 59.702588][ T11] loop_process_work+0xbf0/0x200c [ 59.703469][ T11] loop_workfn+0x48/0x58 [ 59.704182][ T11] process_one_work+0x7e4/0x13bc [ 59.705004][ T11] worker_thread+0x8cc/0xfe8 [ 59.705771][ T11] kthread+0x254/0x2e0 [ 59.706454][ T11] ret_from_fork+0x10/0x20 [ 59.708074][ T11] memory: usage 88kB, limit 96kB, failcnt 161164 [ 59.709138][ T11] memory+swap: usage 2352kB, limit 9007199254740988kB, failcnt 0 [ 59.710378][ T11] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 59.711450][ T11] Memory cgroup stats for /syz0/test: [ 59.711526][ T11] anon 0 [ 59.711526][ T11] file 49152 [ 59.711526][ T11] kernel 28672 [ 59.711526][ T11] kernel_stack 0 [ 59.711526][ T11] pagetables 0 [ 59.711526][ T11] sec_pagetables 0 [ 59.711526][ T11] percpu 0 [ 59.711526][ T11] sock 0 [ 59.711526][ T11] vmalloc 0 [ 59.711526][ T11] shmem 24576 [ 59.711526][ T11] zswap 0 [ 59.711526][ T11] zswapped 0 [ 59.711526][ T11] file_mapped 0 [ 59.711526][ T11] file_dirty 0 [ 59.711526][ T11] file_writeback 0 [ 59.711526][ T11] swapcached 83083264 [ 59.711526][ T11] anon_thp 0 [ 59.711526][ T11] file_thp 0 [ 59.711526][ T11] shmem_thp 0 [ 59.711526][ T11] inactive_anon 8192 [ 59.711526][ T11] active_anon 0 [ 59.711526][ T11] inactive_file 0 [ 59.711526][ T11] active_file 8192 [ 59.711526][ T11] unevictable 0 [ 59.711526][ T11] slab_reclaimable 25456 [ 59.711526][ T11] slab_unreclaimable 8112 [ 59.711526][ T11] slab 33568 [ 59.726394][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.38,pid=4529,uid=0 [ 59.729076][ T11] Memory cgroup out of memory: Killed process 4529 (syz.0.38) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 59.819965][ T4530] loop0: detected capacity change from 0 to 4096 [ 59.824093][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.826372][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 59.827673][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.829500][ T11] Workqueue: loop0 loop_workfn [ 59.830375][ T11] Call trace: [ 59.830972][ T11] dump_backtrace+0x1c4/0x1f0 [ 59.831808][ T11] show_stack+0x2c/0x3c [ 59.832535][ T11] __dump_stack+0x30/0x40 [ 59.833337][ T11] dump_stack_lvl+0xf4/0x15c [ 59.834170][ T11] dump_stack+0x1c/0x5c [ 59.834955][ T11] dump_header+0xc0/0x724 [ 59.835697][ T11] oom_kill_process+0x35c/0x660 [ 59.836577][ T11] out_of_memory+0xbf0/0xf70 [ 59.837385][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.838349][ T11] try_charge_memcg+0xa4c/0x1390 [ 59.839232][ T11] charge_memcg+0xa4/0x1f0 [ 59.840003][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.841132][ T11] __read_swap_cache_async+0x378/0x688 [ 59.842096][ T11] swap_cluster_readahead+0x6c0/0x818 [ 59.843012][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 59.843916][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 59.844838][ T11] shmem_file_read_iter+0x210/0x954 [ 59.845753][ T11] do_iter_read+0x4d4/0x8b4 [ 59.846567][ T11] vfs_iter_read+0x88/0xac [ 59.847347][ T11] loop_process_work+0xbf0/0x200c [ 59.848250][ T11] loop_workfn+0x48/0x58 [ 59.848983][ T11] process_one_work+0x7e4/0x13bc [ 59.849832][ T11] worker_thread+0x8cc/0xfe8 [ 59.850628][ T11] kthread+0x254/0x2e0 [ 59.851338][ T11] ret_from_fork+0x10/0x20 [ 59.852779][ T11] memory: usage 96kB, limit 96kB, failcnt 162269 [ 59.853924][ T11] memory+swap: usage 2352kB, limit 9007199254740988kB, failcnt 0 [ 59.855293][ T11] kmem: usage 32kB, limit 9007199254740988kB, failcnt 0 [ 59.856544][ T11] Memory cgroup stats for /syz0/test: [ 59.856631][ T11] anon 0 [ 59.856631][ T11] file 65536 [ 59.856631][ T11] kernel 32768 [ 59.856631][ T11] kernel_stack 0 [ 59.856631][ T11] pagetables 0 [ 59.856631][ T11] sec_pagetables 0 [ 59.856631][ T11] percpu 0 [ 59.856631][ T11] sock 0 [ 59.856631][ T11] vmalloc 0 [ 59.856631][ T11] shmem 53248 [ 59.856631][ T11] zswap 0 [ 59.856631][ T11] zswapped 0 [ 59.856631][ T11] file_mapped 0 [ 59.856631][ T11] file_dirty 0 [ 59.856631][ T11] file_writeback 0 [ 59.856631][ T11] swapcached 87031808 [ 59.856631][ T11] anon_thp 0 [ 59.856631][ T11] file_thp 0 [ 59.856631][ T11] shmem_thp 0 [ 59.856631][ T11] inactive_anon 36864 [ 59.856631][ T11] active_anon 16384 [ 59.856631][ T11] inactive_file 0 [ 59.856631][ T11] active_file 12288 [ 59.856631][ T11] unevictable 0 [ 59.856631][ T11] slab_reclaimable 15472 [ 59.856631][ T11] slab_unreclaimable 5840 [ 59.856631][ T11] slab 21312 [ 59.873070][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.39,pid=4530,uid=0 [ 59.876085][ T11] Memory cgroup out of memory: Killed process 4530 (syz.0.39) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 59.881920][ T4509] kworker/u4:7 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.884276][ T4509] CPU: 1 PID: 4509 Comm: kworker/u4:7 Not tainted syzkaller #0 [ 59.885566][ T4509] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.887216][ T4509] Workqueue: loop0 loop_rootcg_workfn [ 59.888181][ T4509] Call trace: [ 59.888798][ T4509] dump_backtrace+0x1c4/0x1f0 [ 59.889708][ T4509] show_stack+0x2c/0x3c [ 59.890513][ T4509] __dump_stack+0x30/0x40 [ 59.891333][ T4509] dump_stack_lvl+0xf4/0x15c [ 59.892196][ T4509] dump_stack+0x1c/0x5c [ 59.892971][ T4509] dump_header+0xc0/0x724 [ 59.893794][ T4509] out_of_memory+0xc78/0xf70 [ 59.894606][ T4509] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.895571][ T4509] try_charge_memcg+0xa4c/0x1390 [ 59.896441][ T4509] charge_memcg+0xa4/0x1f0 [ 59.897228][ T4509] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.898241][ T4509] __read_swap_cache_async+0x378/0x688 [ 59.899176][ T4509] swap_cluster_readahead+0x6c0/0x818 [ 59.900101][ T4509] shmem_swapin_folio+0x5c4/0x1170 [ 59.900999][ T4509] shmem_get_folio_gfp+0x274/0x2038 [ 59.901932][ T4509] shmem_file_read_iter+0x210/0x954 [ 59.902850][ T4509] do_iter_read+0x4d4/0x8b4 [ 59.903643][ T4509] vfs_iter_read+0x88/0xac [ 59.904420][ T4509] loop_process_work+0xbf0/0x200c [ 59.905306][ T4509] loop_rootcg_workfn+0x28/0x38 [ 59.906150][ T4509] process_one_work+0x7e4/0x13bc [ 59.907051][ T4509] worker_thread+0x8cc/0xfe8 [ 59.907872][ T4509] kthread+0x254/0x2e0 [ 59.908620][ T4509] ret_from_fork+0x10/0x20 [ 59.909504][ T4509] memory: usage 96kB, limit 96kB, failcnt 162292 [ 59.910533][ T4509] memory+swap: usage 2160kB, limit 9007199254740988kB, failcnt 0 [ 59.911746][ T4509] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 59.912832][ T4509] Memory cgroup stats for /syz0/test: [ 59.912907][ T4509] anon 0 [ 59.912907][ T4509] file 69632 [ 59.912907][ T4509] kernel 24576 [ 59.912907][ T4509] kernel_stack 0 [ 59.912907][ T4509] pagetables 0 [ 59.912907][ T4509] sec_pagetables 0 [ 59.912907][ T4509] percpu 0 [ 59.912907][ T4509] sock 0 [ 59.912907][ T4509] vmalloc 0 [ 59.912907][ T4509] shmem 65536 [ 59.912907][ T4509] zswap 0 [ 59.912907][ T4509] zswapped 0 [ 59.912907][ T4509] file_mapped 0 [ 59.912907][ T4509] file_dirty 0 [ 59.912907][ T4509] file_writeback 0 [ 59.912907][ T4509] swapcached 87031808 [ 59.912907][ T4509] anon_thp 0 [ 59.912907][ T4509] file_thp 0 [ 59.912907][ T4509] shmem_thp 0 [ 59.912907][ T4509] inactive_anon 36864 [ 59.912907][ T4509] active_anon 28672 [ 59.912907][ T4509] inactive_file 0 [ 59.912907][ T4509] active_file 8192 [ 59.912907][ T4509] unevictable 0 [ 59.912907][ T4509] slab_reclaimable 17592 [ 59.912907][ T4509] slab_unreclaimable 3896 [ 59.912907][ T4509] slab 21488 [ 59.930118][ T4509] Out of memory and no killable processes... [ 59.932675][ T4509] kworker/u4:7 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 59.935061][ T4509] CPU: 0 PID: 4509 Comm: kworker/u4:7 Not tainted syzkaller #0 [ 59.936296][ T4509] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 59.937930][ T4509] Workqueue: loop0 loop_rootcg_workfn [ 59.938929][ T4509] Call trace: [ 59.939526][ T4509] dump_backtrace+0x1c4/0x1f0 [ 59.940359][ T4509] show_stack+0x2c/0x3c [ 59.941107][ T4509] __dump_stack+0x30/0x40 [ 59.941870][ T4509] dump_stack_lvl+0xf4/0x15c [ 59.942688][ T4509] dump_stack+0x1c/0x5c [ 59.943416][ T4509] dump_header+0xc0/0x724 [ 59.944193][ T4509] out_of_memory+0xc78/0xf70 [ 59.945013][ T4509] mem_cgroup_out_of_memory+0x228/0x2d0 [ 59.945981][ T4509] try_charge_memcg+0xa4c/0x1390 [ 59.946851][ T4509] charge_memcg+0xa4/0x1f0 [ 59.947659][ T4509] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 59.948773][ T4509] __read_swap_cache_async+0x378/0x688 [ 59.949732][ T4509] swap_cluster_readahead+0x6c0/0x818 [ 59.950712][ T4509] shmem_swapin_folio+0x5c4/0x1170 [ 59.951617][ T4509] shmem_get_folio_gfp+0x274/0x2038 [ 59.952509][ T4509] shmem_file_read_iter+0x210/0x954 [ 59.953421][ T4509] do_iter_read+0x4d4/0x8b4 [ 59.954201][ T4509] vfs_iter_read+0x88/0xac [ 59.954969][ T4509] loop_process_work+0xbf0/0x200c [ 59.955864][ T4509] loop_rootcg_workfn+0x28/0x38 [ 59.956712][ T4509] process_one_work+0x7e4/0x13bc [ 59.957574][ T4509] worker_thread+0x8cc/0xfe8 [ 59.958348][ T4509] kthread+0x254/0x2e0 [ 59.959037][ T4509] ret_from_fork+0x10/0x20 [ 59.960315][ T4509] memory: usage 96kB, limit 96kB, failcnt 162311 [ 59.961484][ T4509] memory+swap: usage 2160kB, limit 9007199254740988kB, failcnt 0 [ 59.962764][ T4509] kmem: usage 16kB, limit 9007199254740988kB, failcnt 0 [ 59.963916][ T4509] Memory cgroup stats for /syz0/test: [ 59.963989][ T4509] anon 0 [ 59.963989][ T4509] file 69632 [ 59.963989][ T4509] kernel 16384 [ 59.963989][ T4509] kernel_stack 0 [ 59.963989][ T4509] pagetables 0 [ 59.963989][ T4509] sec_pagetables 0 [ 59.963989][ T4509] percpu 0 [ 59.963989][ T4509] sock 0 [ 59.963989][ T4509] vmalloc 0 [ 59.963989][ T4509] shmem 65536 [ 59.963989][ T4509] zswap 0 [ 59.963989][ T4509] zswapped 0 [ 59.963989][ T4509] file_mapped 0 [ 59.963989][ T4509] file_dirty 0 [ 59.963989][ T4509] file_writeback 0 [ 59.963989][ T4509] swapcached 87031808 [ 59.963989][ T4509] anon_thp 0 [ 59.963989][ T4509] file_thp 0 [ 59.963989][ T4509] shmem_thp 0 [ 59.963989][ T4509] inactive_anon 36864 [ 59.963989][ T4509] active_anon 28672 [ 59.963989][ T4509] inactive_file 0 [ 59.963989][ T4509] active_file 8192 [ 59.963989][ T4509] unevictable 0 [ 59.963989][ T4509] slab_reclaimable 11928 [ 59.963989][ T4509] slab_unreclaimable 3896 [ 59.963989][ T4509] slab 15824 [ 59.980138][ T4509] Out of memory and no killable processes... [ 59.981219][ C0] Buffer I/O error on dev loop0, logical block 1848, async page read [ 60.047061][ T4531] loop0: detected capacity change from 0 to 4096 [ 60.051827][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 60.054143][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 60.055299][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 60.057002][ T39] Workqueue: loop0 loop_rootcg_workfn [ 60.058014][ T39] Call trace: [ 60.058620][ T39] dump_backtrace+0x1c4/0x1f0 [ 60.059481][ T39] show_stack+0x2c/0x3c [ 60.060236][ T39] __dump_stack+0x30/0x40 [ 60.061039][ T39] dump_stack_lvl+0xf4/0x15c [ 60.061901][ T39] dump_stack+0x1c/0x5c [ 60.062632][ T39] dump_header+0xc0/0x724 [ 60.063401][ T39] oom_kill_process+0x35c/0x660 [ 60.064331][ T39] out_of_memory+0xbf0/0xf70 [ 60.065218][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 60.066268][ T39] try_charge_memcg+0xa4c/0x1390 [ 60.067147][ T39] charge_memcg+0xa4/0x1f0 [ 60.067949][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 60.069047][ T39] __read_swap_cache_async+0x378/0x688 [ 60.070001][ T39] swap_cluster_readahead+0x6c0/0x818 [ 60.070942][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 60.071828][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 60.072728][ T39] shmem_file_read_iter+0x210/0x954 [ 60.073721][ T39] do_iter_read+0x4d4/0x8b4 [ 60.074549][ T39] vfs_iter_read+0x88/0xac [ 60.075368][ T39] loop_process_work+0xbf0/0x200c [ 60.076302][ T39] loop_rootcg_workfn+0x28/0x38 [ 60.077186][ T39] process_one_work+0x7e4/0x13bc [ 60.078102][ T39] worker_thread+0x8cc/0xfe8 [ 60.078929][ T39] kthread+0x254/0x2e0 [ 60.079642][ T39] ret_from_fork+0x10/0x20 [ 60.081167][ T39] memory: usage 96kB, limit 96kB, failcnt 163500 [ 60.082269][ T39] memory+swap: usage 2300kB, limit 9007199254740988kB, failcnt 0 [ 60.083651][ T39] kmem: usage 40kB, limit 9007199254740988kB, failcnt 0 [ 60.084834][ T39] Memory cgroup stats for /syz0/test: [ 60.084914][ T39] anon 0 [ 60.084914][ T39] file 57344 [ 60.084914][ T39] kernel 40960 [ 60.084914][ T39] kernel_stack 0 [ 60.084914][ T39] pagetables 0 [ 60.084914][ T39] sec_pagetables 0 [ 60.084914][ T39] percpu 0 [ 60.084914][ T39] sock 0 [ 60.084914][ T39] vmalloc 0 [ 60.084914][ T39] shmem 40960 [ 60.084914][ T39] zswap 0 [ 60.084914][ T39] zswapped 0 [ 60.084914][ T39] file_mapped 0 [ 60.084914][ T39] file_dirty 0 [ 60.084914][ T39] file_writeback 0 [ 60.084914][ T39] swapcached 91181056 [ 60.084914][ T39] anon_thp 0 [ 60.084914][ T39] file_thp 0 [ 60.084914][ T39] shmem_thp 0 [ 60.084914][ T39] inactive_anon 24576 [ 60.084914][ T39] active_anon 16384 [ 60.084914][ T39] inactive_file 0 [ 60.084914][ T39] active_file 16384 [ 60.084914][ T39] unevictable 0 [ 60.084914][ T39] slab_reclaimable 25904 [ 60.084914][ T39] slab_unreclaimable 5840 [ 60.084914][ T39] slab 31744 [ 60.101659][ T39] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.40,pid=4531,uid=0 [ 60.104250][ T39] Memory cgroup out of memory: Killed process 4531 (syz.0.40) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 60.120993][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 60.123193][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 60.124358][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 60.125975][ T39] Workqueue: loop0 loop_rootcg_workfn [ 60.126822][ T39] Call trace: [ 60.127364][ T39] dump_backtrace+0x1c4/0x1f0 [ 60.128137][ T39] show_stack+0x2c/0x3c [ 60.128880][ T39] __dump_stack+0x30/0x40 [ 60.129654][ T39] dump_stack_lvl+0xf4/0x15c [ 60.130497][ T39] dump_stack+0x1c/0x5c [ 60.131263][ T39] dump_header+0xc0/0x724 [ 60.132064][ T39] out_of_memory+0xc78/0xf70 [ 60.132858][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 60.133782][ T39] try_charge_memcg+0xa4c/0x1390 [ 60.134619][ T39] charge_memcg+0xa4/0x1f0 [ 60.135391][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 60.136491][ T39] __read_swap_cache_async+0x378/0x688 [ 60.137473][ T39] swap_cluster_readahead+0x6c0/0x818 [ 60.138444][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 60.139377][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 60.140262][ T39] shmem_file_read_iter+0x210/0x954 [ 60.141172][ T39] do_iter_read+0x4d4/0x8b4 [ 60.142016][ T39] vfs_iter_read+0x88/0xac [ 60.142843][ T39] loop_process_work+0xbf0/0x200c [ 60.143742][ T39] loop_rootcg_workfn+0x28/0x38 [ 60.144596][ T39] process_one_work+0x7e4/0x13bc [ 60.145501][ T39] worker_thread+0x8cc/0xfe8 [ 60.146336][ T39] kthread+0x254/0x2e0 [ 60.147055][ T39] ret_from_fork+0x10/0x20 [ 60.147929][ T39] memory: usage 96kB, limit 96kB, failcnt 163860 [ 60.149032][ T39] memory+swap: usage 2156kB, limit 9007199254740988kB, failcnt 0 [ 60.150223][ T39] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 60.151364][ T39] Memory cgroup stats for /syz0/test: [ 60.151460][ T39] anon 0 [ 60.151460][ T39] file 65536 [ 60.151460][ T39] kernel 28672 [ 60.151460][ T39] kernel_stack 0 [ 60.151460][ T39] pagetables 0 [ 60.151460][ T39] sec_pagetables 0 [ 60.151460][ T39] percpu 0 [ 60.151460][ T39] sock 0 [ 60.151460][ T39] vmalloc 0 [ 60.151460][ T39] shmem 61440 [ 60.151460][ T39] zswap 0 [ 60.151460][ T39] zswapped 0 [ 60.151460][ T39] file_mapped 0 [ 60.151460][ T39] file_dirty 0 [ 60.151460][ T39] file_writeback 0 [ 60.151460][ T39] swapcached 91181056 [ 60.151460][ T39] anon_thp 0 [ 60.151460][ T39] file_thp 0 [ 60.151460][ T39] shmem_thp 0 [ 60.151460][ T39] inactive_anon 28672 [ 60.151460][ T39] active_anon 32768 [ 60.151460][ T39] inactive_file 0 [ 60.151460][ T39] active_file 8192 [ 60.151460][ T39] unevictable 0 [ 60.151460][ T39] slab_reclaimable 21832 [ 60.151460][ T39] slab_unreclaimable 3896 [ 60.151460][ T39] slab 25728 [ 60.166788][ T39] Out of memory and no killable processes... [ 60.171908][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 60.174320][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 60.175672][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 60.177494][ T39] Workqueue: loop0 loop_rootcg_workfn [ 60.178464][ T39] Call trace: [ 60.179078][ T39] dump_backtrace+0x1c4/0x1f0 [ 60.179935][ T39] show_stack+0x2c/0x3c [ 60.180802][ T39] __dump_stack+0x30/0x40 [ 60.181685][ T39] dump_stack_lvl+0xf4/0x15c [ 60.182562][ T39] dump_stack+0x1c/0x5c [ 60.183372][ T39] dump_header+0xc0/0x724 [ 60.184195][ T39] out_of_memory+0xc78/0xf70 [ 60.185092][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 60.186148][ T39] try_charge_memcg+0xa4c/0x1390 [ 60.187074][ T39] charge_memcg+0xa4/0x1f0 [ 60.187886][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 60.188993][ T39] __read_swap_cache_async+0x378/0x688 [ 60.189999][ T39] swap_cluster_readahead+0x6c0/0x818 [ 60.190951][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 60.191888][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 60.192876][ T39] shmem_file_read_iter+0x210/0x954 [ 60.193996][ T39] do_iter_read+0x4d4/0x8b4 [ 60.194891][ T39] vfs_iter_read+0x88/0xac [ 60.195743][ T39] loop_process_work+0xbf0/0x200c [ 60.196713][ T39] loop_rootcg_workfn+0x28/0x38 [ 60.197624][ T39] process_one_work+0x7e4/0x13bc [ 60.198567][ T39] worker_thread+0x8cc/0xfe8 [ 60.199456][ T39] kthread+0x254/0x2e0 [ 60.200218][ T39] ret_from_fork+0x10/0x20 [ 60.201123][ T39] memory: usage 96kB, limit 96kB, failcnt 163880 [ 60.202235][ T39] memory+swap: usage 2152kB, limit 9007199254740988kB, failcnt 0 [ 60.203587][ T39] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 60.204827][ T39] Memory cgroup stats for /syz0/test: [ 60.204904][ T39] anon 0 [ 60.204904][ T39] file 69632 [ 60.204904][ T39] kernel 24576 [ 60.204904][ T39] kernel_stack 0 [ 60.204904][ T39] pagetables 0 [ 60.204904][ T39] sec_pagetables 0 [ 60.204904][ T39] percpu 0 [ 60.204904][ T39] sock 0 [ 60.204904][ T39] vmalloc 0 [ 60.204904][ T39] shmem 65536 [ 60.204904][ T39] zswap 0 [ 60.204904][ T39] zswapped 0 [ 60.204904][ T39] file_mapped 0 [ 60.204904][ T39] file_dirty 0 [ 60.204904][ T39] file_writeback 0 [ 60.204904][ T39] swapcached 91181056 [ 60.204904][ T39] anon_thp 0 [ 60.204904][ T39] file_thp 0 [ 60.204904][ T39] shmem_thp 0 [ 60.204904][ T39] inactive_anon 28672 [ 60.204904][ T39] active_anon 36864 [ 60.204904][ T39] inactive_file 0 [ 60.204904][ T39] active_file 8192 [ 60.204904][ T39] unevictable 0 [ 60.204904][ T39] slab_reclaimable 19712 [ 60.204904][ T39] slab_unreclaimable 3896 [ 60.204904][ T39] slab 23608 [ 60.221418][ T39] Out of memory and no killable processes... [ 60.276687][ T4532] loop0: detected capacity change from 0 to 4096 [ 60.281941][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 60.284149][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 60.285330][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 60.287063][ T39] Workqueue: loop0 loop_workfn [ 60.287919][ T39] Call trace: [ 60.288501][ T39] dump_backtrace+0x1c4/0x1f0 [ 60.289316][ T39] show_stack+0x2c/0x3c [ 60.290044][ T39] __dump_stack+0x30/0x40 [ 60.290795][ T39] dump_stack_lvl+0xf4/0x15c [ 60.291609][ T39] dump_stack+0x1c/0x5c [ 60.292354][ T39] dump_header+0xc0/0x724 [ 60.293135][ T39] oom_kill_process+0x35c/0x660 [ 60.293994][ T39] out_of_memory+0xbf0/0xf70 [ 60.294837][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 60.295857][ T39] try_charge_memcg+0xa4c/0x1390 [ 60.296724][ T39] charge_memcg+0xa4/0x1f0 [ 60.297548][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 60.298666][ T39] __read_swap_cache_async+0x378/0x688 [ 60.299608][ T39] swap_cluster_readahead+0x6c0/0x818 [ 60.300578][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 60.301492][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 60.302453][ T39] shmem_file_read_iter+0x210/0x954 [ 60.303396][ T39] do_iter_read+0x4d4/0x8b4 [ 60.304226][ T39] vfs_iter_read+0x88/0xac [ 60.305010][ T39] loop_process_work+0xbf0/0x200c [ 60.305890][ T39] loop_workfn+0x48/0x58 [ 60.306628][ T39] process_one_work+0x7e4/0x13bc [ 60.307509][ T39] worker_thread+0x8cc/0xfe8 [ 60.308303][ T39] kthread+0x254/0x2e0 [ 60.309033][ T39] ret_from_fork+0x10/0x20 [ 60.310339][ T39] memory: usage 96kB, limit 96kB, failcnt 164985 [ 60.311477][ T39] memory+swap: usage 2500kB, limit 9007199254740988kB, failcnt 0 [ 60.312803][ T39] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 60.313933][ T39] Memory cgroup stats for /syz0/test: [ 60.314004][ T39] anon 4096 [ 60.314004][ T39] file 57344 [ 60.314004][ T39] kernel 28672 [ 60.314004][ T39] kernel_stack 0 [ 60.314004][ T39] pagetables 0 [ 60.314004][ T39] sec_pagetables 0 [ 60.314004][ T39] percpu 0 [ 60.314004][ T39] sock 0 [ 60.314004][ T39] vmalloc 0 [ 60.314004][ T39] shmem 53248 [ 60.314004][ T39] zswap 0 [ 60.314004][ T39] zswapped 0 [ 60.314004][ T39] file_mapped 0 [ 60.314004][ T39] file_dirty 0 [ 60.314004][ T39] file_writeback 0 [ 60.314004][ T39] swapcached 95232000 [ 60.314004][ T39] anon_thp 0 [ 60.314004][ T39] file_thp 0 [ 60.314004][ T39] shmem_thp 0 [ 60.314004][ T39] inactive_anon 45056 [ 60.314004][ T39] active_anon 20480 [ 60.314004][ T39] inactive_file 0 [ 60.314004][ T39] active_file 4096 [ 60.314004][ T39] unevictable 0 [ 60.314004][ T39] slab_reclaimable 10968 [ 60.314004][ T39] slab_unreclaimable 5840 [ 60.314004][ T39] slab 16808 [ 60.331082][ T39] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.41,pid=4532,uid=0 [ 60.333635][ T39] Memory cgroup out of memory: Killed process 4532 (syz.0.41) total-vm:44868kB, anon-rss:1312kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 60.354397][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 60.356732][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 60.357903][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 60.359701][ T11] Workqueue: loop0 loop_rootcg_workfn [ 60.360770][ T11] Call trace: [ 60.361430][ T11] dump_backtrace+0x1c4/0x1f0 [ 60.362351][ T11] show_stack+0x2c/0x3c [ 60.363148][ T11] __dump_stack+0x30/0x40 [ 60.363959][ T11] dump_stack_lvl+0xf4/0x15c [ 60.364765][ T11] dump_stack+0x1c/0x5c [ 60.365504][ T11] dump_header+0xc0/0x724 [ 60.366264][ T11] out_of_memory+0xc78/0xf70 [ 60.367081][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 60.368230][ T11] try_charge_memcg+0xa4c/0x1390 [ 60.369205][ T11] charge_memcg+0xa4/0x1f0 [ 60.370071][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 60.371327][ T11] __read_swap_cache_async+0x378/0x688 [ 60.372502][ T11] swap_cluster_readahead+0x6c0/0x818 [ 60.373608][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 60.374531][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 60.375452][ T11] shmem_file_read_iter+0x210/0x954 [ 60.376343][ T11] do_iter_read+0x4d4/0x8b4 [ 60.377150][ T11] vfs_iter_read+0x88/0xac [ 60.377921][ T11] loop_process_work+0xbf0/0x200c [ 60.378783][ T11] loop_rootcg_workfn+0x28/0x38 [ 60.379657][ T11] process_one_work+0x7e4/0x13bc [ 60.380552][ T11] worker_thread+0x8cc/0xfe8 [ 60.381366][ T11] kthread+0x254/0x2e0 [ 60.382115][ T11] ret_from_fork+0x10/0x20 [ 60.383257][ T11] memory: usage 96kB, limit 96kB, failcnt 165354 [ 60.384341][ T11] memory+swap: usage 2488kB, limit 9007199254740988kB, failcnt 0 [ 60.385632][ T11] kmem: usage 16kB, limit 9007199254740988kB, failcnt 0 [ 60.386770][ T11] Memory cgroup stats for /syz0/test: [ 60.386842][ T11] anon 0 [ 60.386842][ T11] file 77824 [ 60.386842][ T11] kernel 16384 [ 60.386842][ T11] kernel_stack 0 [ 60.386842][ T11] pagetables 0 [ 60.386842][ T11] sec_pagetables 0 [ 60.386842][ T11] percpu 0 [ 60.386842][ T11] sock 0 [ 60.386842][ T11] vmalloc 0 [ 60.386842][ T11] shmem 73728 [ 60.386842][ T11] zswap 0 [ 60.386842][ T11] zswapped 0 [ 60.386842][ T11] file_mapped 0 [ 60.386842][ T11] file_dirty 0 [ 60.386842][ T11] file_writeback 0 [ 60.386842][ T11] swapcached 95227904 [ 60.386842][ T11] anon_thp 0 [ 60.386842][ T11] file_thp 0 [ 60.386842][ T11] shmem_thp 0 [ 60.386842][ T11] inactive_anon 49152 [ 60.386842][ T11] active_anon 20480 [ 60.386842][ T11] inactive_file 0 [ 60.386842][ T11] active_file 8192 [ 60.386842][ T11] unevictable 0 [ 60.386842][ T11] slab_reclaimable 11928 [ 60.386842][ T11] slab_unreclaimable 3896 [ 60.386842][ T11] slab 15824 [ 60.406452][ T11] Out of memory and no killable processes... [ 60.409169][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 60.411534][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 60.412751][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 60.414559][ T11] Workqueue: loop0 loop_rootcg_workfn [ 60.415456][ T11] Call trace: [ 60.415991][ T11] dump_backtrace+0x1c4/0x1f0 [ 60.416772][ T11] show_stack+0x2c/0x3c [ 60.417445][ T11] __dump_stack+0x30/0x40 [ 60.418152][ T11] dump_stack_lvl+0xf4/0x15c [ 60.418965][ T11] dump_stack+0x1c/0x5c [ 60.419694][ T11] dump_header+0xc0/0x724 [ 60.420428][ T11] out_of_memory+0xc78/0xf70 [ 60.421213][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 60.422179][ T11] try_charge_memcg+0xa4c/0x1390 [ 60.423031][ T11] charge_memcg+0xa4/0x1f0 [ 60.423854][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 60.424889][ T11] __read_swap_cache_async+0x378/0x688 [ 60.425875][ T11] swap_cluster_readahead+0x6c0/0x818 [ 60.426817][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 60.427693][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 60.428603][ T11] shmem_file_read_iter+0x210/0x954 [ 60.429512][ T11] do_iter_read+0x4d4/0x8b4 [ 60.430297][ T11] vfs_iter_read+0x88/0xac [ 60.431086][ T11] loop_process_work+0xbf0/0x200c [ 60.431981][ T11] loop_rootcg_workfn+0x28/0x38 [ 60.432843][ T11] process_one_work+0x7e4/0x13bc [ 60.433774][ T11] worker_thread+0x8cc/0xfe8 [ 60.434625][ T11] kthread+0x254/0x2e0 [ 60.435341][ T11] ret_from_fork+0x10/0x20 [ 60.436228][ T11] memory: usage 96kB, limit 96kB, failcnt 165373 [ 60.437313][ T11] memory+swap: usage 2488kB, limit 9007199254740988kB, failcnt 0 [ 60.438955][ T11] kmem: usage 12kB, limit 9007199254740988kB, failcnt 0 [ 60.440216][ T11] Memory cgroup stats for /syz0/test: [ 60.440292][ T11] anon 40960 [ 60.440292][ T11] file 4096 [ 60.440292][ T11] kernel 12288 [ 60.440292][ T11] kernel_stack 0 [ 60.440292][ T11] pagetables 0 [ 60.440292][ T11] sec_pagetables 0 [ 60.440292][ T11] percpu 0 [ 60.440292][ T11] sock 0 [ 60.440292][ T11] vmalloc 0 [ 60.440292][ T11] shmem 0 [ 60.440292][ T11] zswap 0 [ 60.440292][ T11] zswapped 0 [ 60.440292][ T11] file_mapped 0 [ 60.440292][ T11] file_dirty 0 [ 60.440292][ T11] file_writeback 24576 [ 60.440292][ T11] swapcached 95338496 [ 60.440292][ T11] anon_thp 0 [ 60.440292][ T11] file_thp 0 [ 60.440292][ T11] shmem_thp 0 [ 60.440292][ T11] inactive_anon 0 [ 60.440292][ T11] active_anon 0 [ 60.440292][ T11] inactive_file 0 [ 60.440292][ T11] active_file 4096 [ 60.440292][ T11] unevictable 0 [ 60.440292][ T11] slab_reclaimable 9424 [ 60.440292][ T11] slab_unreclaimable 2272 [ 60.440292][ T11] slab 11696 [ 60.455853][ T11] Out of memory and no killable processes... [ 60.456929][ C1] Buffer I/O error on dev loop0, logical block 1752, async page read [ 60.497709][ T4533] loop0: detected capacity change from 0 to 4096 [ 60.509486][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 60.511836][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 60.513138][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 60.514895][ T11] Workqueue: loop0 loop_workfn [ 60.515740][ T11] Call trace: [ 60.516300][ T11] dump_backtrace+0x1c4/0x1f0 [ 60.517079][ T11] show_stack+0x2c/0x3c [ 60.517792][ T11] __dump_stack+0x30/0x40 [ 60.518595][ T11] dump_stack_lvl+0xf4/0x15c [ 60.519388][ T11] dump_stack+0x1c/0x5c [ 60.520149][ T11] dump_header+0xc0/0x724 [ 60.520885][ T11] oom_kill_process+0x35c/0x660 [ 60.521705][ T11] out_of_memory+0xbf0/0xf70 [ 60.522538][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 60.523482][ T11] try_charge_memcg+0xa4c/0x1390 [ 60.524341][ T11] charge_memcg+0xa4/0x1f0 [ 60.525114][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 60.526189][ T11] __read_swap_cache_async+0x378/0x688 [ 60.527160][ T11] swap_cluster_readahead+0x6c0/0x818 [ 60.528116][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 60.529016][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 60.529946][ T11] shmem_file_read_iter+0x210/0x954 [ 60.530875][ T11] do_iter_read+0x4d4/0x8b4 [ 60.531674][ T11] vfs_iter_read+0x88/0xac [ 60.532456][ T11] loop_process_work+0xbf0/0x200c [ 60.533360][ T11] loop_workfn+0x48/0x58 [ 60.534122][ T11] process_one_work+0x7e4/0x13bc [ 60.534984][ T11] worker_thread+0x8cc/0xfe8 [ 60.535776][ T11] kthread+0x254/0x2e0 [ 60.536487][ T11] ret_from_fork+0x10/0x20 [ 60.537717][ T11] memory: usage 96kB, limit 96kB, failcnt 166522 [ 60.538981][ T11] memory+swap: usage 2240kB, limit 9007199254740988kB, failcnt 0 [ 60.540410][ T11] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 60.541656][ T11] Memory cgroup stats for /syz0/test: [ 60.541756][ T11] anon 0 [ 60.541756][ T11] file 73728 [ 60.541756][ T11] kernel 24576 [ 60.541756][ T11] kernel_stack 0 [ 60.541756][ T11] pagetables 0 [ 60.541756][ T11] sec_pagetables 0 [ 60.541756][ T11] percpu 0 [ 60.541756][ T11] sock 0 [ 60.541756][ T11] vmalloc 0 [ 60.541756][ T11] shmem 61440 [ 60.541756][ T11] zswap 0 [ 60.541756][ T11] zswapped 0 [ 60.541756][ T11] file_mapped 0 [ 60.541756][ T11] file_dirty 0 [ 60.541756][ T11] file_writeback 0 [ 60.541756][ T11] swapcached 99311616 [ 60.541756][ T11] anon_thp 0 [ 60.541756][ T11] file_thp 0 [ 60.541756][ T11] shmem_thp 0 [ 60.541756][ T11] inactive_anon 20480 [ 60.541756][ T11] active_anon 40960 [ 60.541756][ T11] inactive_file 0 [ 60.541756][ T11] active_file 12288 [ 60.541756][ T11] unevictable 0 [ 60.541756][ T11] slab_reclaimable 15472 [ 60.541756][ T11] slab_unreclaimable 5840 [ 60.541756][ T11] slab 21312 [ 60.557737][ T11] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.42,pid=4533,uid=0 [ 60.560931][ T11] Memory cgroup out of memory: Killed process 4533 (syz.0.42) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 60.677225][ T4534] loop0: detected capacity change from 0 to 4096 [ 60.683970][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 60.686374][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 60.687661][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 60.689484][ T39] Workqueue: loop0 loop_rootcg_workfn [ 60.690619][ T39] Call trace: [ 60.691300][ T39] dump_backtrace+0x1c4/0x1f0 [ 60.692210][ T39] show_stack+0x2c/0x3c [ 60.692998][ T39] __dump_stack+0x30/0x40 [ 60.693852][ T39] dump_stack_lvl+0xf4/0x15c [ 60.694670][ T39] dump_stack+0x1c/0x5c [ 60.695426][ T39] dump_header+0xc0/0x724 [ 60.696199][ T39] oom_kill_process+0x35c/0x660 [ 60.697070][ T39] out_of_memory+0xbf0/0xf70 [ 60.697924][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 60.698928][ T39] try_charge_memcg+0xa4c/0x1390 [ 60.699818][ T39] charge_memcg+0xa4/0x1f0 [ 60.700630][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 60.701764][ T39] __read_swap_cache_async+0x378/0x688 [ 60.702799][ T39] swap_cluster_readahead+0x6c0/0x818 [ 60.703775][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 60.704659][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 60.705567][ T39] shmem_file_read_iter+0x210/0x954 [ 60.706449][ T39] do_iter_read+0x4d4/0x8b4 [ 60.707236][ T39] vfs_iter_read+0x88/0xac [ 60.708010][ T39] loop_process_work+0xbf0/0x200c [ 60.709075][ T39] loop_rootcg_workfn+0x28/0x38 [ 60.710065][ T39] process_one_work+0x7e4/0x13bc [ 60.711071][ T39] worker_thread+0x8cc/0xfe8 [ 60.711902][ T39] kthread+0x254/0x2e0 [ 60.712635][ T39] ret_from_fork+0x10/0x20 [ 60.714497][ T39] memory: usage 68kB, limit 96kB, failcnt 167705 [ 60.715623][ T39] memory+swap: usage 2344kB, limit 9007199254740988kB, failcnt 0 [ 60.717029][ T39] kmem: usage 40kB, limit 9007199254740988kB, failcnt 0 [ 60.718616][ T39] Memory cgroup stats for /syz0/test: [ 60.718683][ T39] anon 0 [ 60.718683][ T39] file 36864 [ 60.718683][ T39] kernel 32768 [ 60.718683][ T39] kernel_stack 0 [ 60.718683][ T39] pagetables 0 [ 60.718683][ T39] sec_pagetables 0 [ 60.718683][ T39] percpu 0 [ 60.718683][ T39] sock 0 [ 60.718683][ T39] vmalloc 0 [ 60.718683][ T39] shmem 24576 [ 60.718683][ T39] zswap 0 [ 60.718683][ T39] zswapped 0 [ 60.718683][ T39] file_mapped 0 [ 60.718683][ T39] file_dirty 0 [ 60.718683][ T39] file_writeback 0 [ 60.718683][ T39] swapcached 103514112 [ 60.718683][ T39] anon_thp 0 [ 60.718683][ T39] file_thp 0 [ 60.718683][ T39] shmem_thp 0 [ 60.718683][ T39] inactive_anon 16384 [ 60.718683][ T39] active_anon 28672 [ 60.718683][ T39] inactive_file 0 [ 60.718683][ T39] active_file 12288 [ 60.718683][ T39] unevictable 0 [ 60.718683][ T39] slab_reclaimable 23520 [ 60.718683][ T39] slab_unreclaimable 5840 [ 60.718683][ T39] slab 29360 [ 60.734684][ T39] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.43,pid=4534,uid=0 [ 60.737366][ T39] Memory cgroup out of memory: Killed process 4534 (syz.0.43) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 62.798754][ T29] oom_reaper: reaped process 4534 (syz.0.43), now anon-rss:0kB, file-rss:72kB, shmem-rss:0kB [ 62.800953][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 62.803231][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 62.804377][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 62.805925][ T39] Workqueue: loop0 loop_rootcg_workfn [ 62.806964][ T39] Call trace: [ 62.807569][ T39] dump_backtrace+0x1c4/0x1f0 [ 62.808403][ T39] show_stack+0x2c/0x3c [ 62.809161][ T39] __dump_stack+0x30/0x40 [ 62.809943][ T39] dump_stack_lvl+0xf4/0x15c [ 62.810796][ T39] dump_stack+0x1c/0x5c [ 62.811556][ T39] dump_header+0xc0/0x724 [ 62.812335][ T39] out_of_memory+0xc78/0xf70 [ 62.813175][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 62.814190][ T39] try_charge_memcg+0xa4c/0x1390 [ 62.815092][ T39] charge_memcg+0xa4/0x1f0 [ 62.815880][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 62.816942][ T39] __read_swap_cache_async+0x378/0x688 [ 62.817920][ T39] swap_cluster_readahead+0x328/0x818 [ 62.818876][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 62.819851][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 62.820767][ T39] shmem_file_read_iter+0x210/0x954 [ 62.821665][ T39] do_iter_read+0x4d4/0x8b4 [ 62.822451][ T39] vfs_iter_read+0x88/0xac [ 62.823212][ T39] loop_process_work+0xbf0/0x200c [ 62.824108][ T39] loop_rootcg_workfn+0x28/0x38 [ 62.824951][ T39] process_one_work+0x7e4/0x13bc [ 62.825826][ T39] worker_thread+0x8cc/0xfe8 [ 62.826641][ T39] kthread+0x254/0x2e0 [ 62.827321][ T39] ret_from_fork+0x10/0x20 [ 62.828406][ T39] memory: usage 96kB, limit 96kB, failcnt 229057 [ 62.829466][ T39] memory+swap: usage 2308kB, limit 9007199254740988kB, failcnt 0 [ 62.830725][ T39] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 62.831793][ T39] Memory cgroup stats for /syz0/test: [ 62.831877][ T39] anon 0 [ 62.831877][ T39] file 36864 [ 62.831877][ T39] kernel 28672 [ 62.831877][ T39] kernel_stack 0 [ 62.831877][ T39] pagetables 0 [ 62.831877][ T39] sec_pagetables 0 [ 62.831877][ T39] percpu 0 [ 62.831877][ T39] sock 0 [ 62.831877][ T39] vmalloc 0 [ 62.831877][ T39] shmem 28672 [ 62.831877][ T39] zswap 0 [ 62.831877][ T39] zswapped 0 [ 62.831877][ T39] file_mapped 0 [ 62.831877][ T39] file_dirty 0 [ 62.831877][ T39] file_writeback 0 [ 62.831877][ T39] swapcached 103522304 [ 62.831877][ T39] anon_thp 0 [ 62.831877][ T39] file_thp 0 [ 62.831877][ T39] shmem_thp 0 [ 62.831877][ T39] inactive_anon 57344 [ 62.831877][ T39] active_anon 0 [ 62.831877][ T39] inactive_file 8192 [ 62.831877][ T39] active_file 4096 [ 62.831877][ T39] unevictable 0 [ 62.831877][ T39] slab_reclaimable 20672 [ 62.831877][ T39] slab_unreclaimable 5192 [ 62.831877][ T39] slab 25864 [ 62.847274][ T39] Out of memory and no killable processes... [ 62.848566][ T11] kworker/u4:1 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 62.851117][ T11] CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0 [ 62.852614][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 62.854445][ T11] Workqueue: loop0 loop_workfn [ 62.855328][ T11] Call trace: [ 62.855949][ T11] dump_backtrace+0x1c4/0x1f0 [ 62.856822][ T11] show_stack+0x2c/0x3c [ 62.857601][ T11] __dump_stack+0x30/0x40 [ 62.858382][ T11] dump_stack_lvl+0xf4/0x15c [ 62.859171][ T11] dump_stack+0x1c/0x5c [ 62.859939][ T11] dump_header+0xc0/0x724 [ 62.860741][ T11] out_of_memory+0xc78/0xf70 [ 62.861580][ T11] mem_cgroup_out_of_memory+0x228/0x2d0 [ 62.862612][ T11] try_charge_memcg+0xa4c/0x1390 [ 62.863494][ T11] charge_memcg+0xa4/0x1f0 [ 62.864238][ T11] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 62.865332][ T11] __read_swap_cache_async+0x378/0x688 [ 62.866265][ T11] swap_cluster_readahead+0x328/0x818 [ 62.867173][ T11] shmem_swapin_folio+0x5c4/0x1170 [ 62.868041][ T11] shmem_get_folio_gfp+0x274/0x2038 [ 62.868981][ T11] shmem_file_read_iter+0x210/0x954 [ 62.869931][ T11] do_iter_read+0x4d4/0x8b4 [ 62.870712][ T11] vfs_iter_read+0x88/0xac [ 62.871496][ T11] loop_process_work+0xbf0/0x200c [ 62.872314][ T11] loop_workfn+0x48/0x58 [ 62.873070][ T11] process_one_work+0x7e4/0x13bc [ 62.873967][ T11] worker_thread+0x8cc/0xfe8 [ 62.874769][ T11] kthread+0x254/0x2e0 [ 62.875475][ T11] ret_from_fork+0x10/0x20 [ 62.877184][ T11] memory: usage 96kB, limit 96kB, failcnt 229076 [ 62.878302][ T11] memory+swap: usage 2308kB, limit 9007199254740988kB, failcnt 0 [ 62.879534][ T11] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 62.880657][ T11] Memory cgroup stats for /syz0/test: [ 62.880724][ T11] anon 0 [ 62.880724][ T11] file 36864 [ 62.880724][ T11] kernel 28672 [ 62.880724][ T11] kernel_stack 0 [ 62.880724][ T11] pagetables 0 [ 62.880724][ T11] sec_pagetables 0 [ 62.880724][ T11] percpu 0 [ 62.880724][ T11] sock 0 [ 62.880724][ T11] vmalloc 0 [ 62.880724][ T11] shmem 28672 [ 62.880724][ T11] zswap 0 [ 62.880724][ T11] zswapped 0 [ 62.880724][ T11] file_mapped 0 [ 62.880724][ T11] file_dirty 0 [ 62.880724][ T11] file_writeback 0 [ 62.880724][ T11] swapcached 103522304 [ 62.880724][ T11] anon_thp 0 [ 62.880724][ T11] file_thp 0 [ 62.880724][ T11] shmem_thp 0 [ 62.880724][ T11] inactive_anon 57344 [ 62.880724][ T11] active_anon 0 [ 62.880724][ T11] inactive_file 8192 [ 62.880724][ T11] active_file 4096 [ 62.880724][ T11] unevictable 0 [ 62.880724][ T11] slab_reclaimable 20672 [ 62.880724][ T11] slab_unreclaimable 5192 [ 62.880724][ T11] slab 25864 [ 62.896694][ T11] Out of memory and no killable processes... [ 62.897753][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 62.900300][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 62.901600][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 62.903273][ T39] Workqueue: loop0 loop_rootcg_workfn [ 62.904190][ T39] Call trace: [ 62.904770][ T39] dump_backtrace+0x1c4/0x1f0 [ 62.905594][ T39] show_stack+0x2c/0x3c [ 62.906287][ T39] __dump_stack+0x30/0x40 [ 62.907015][ T39] dump_stack_lvl+0xf4/0x15c [ 62.907764][ T39] dump_stack+0x1c/0x5c [ 62.908477][ T39] dump_header+0xc0/0x724 [ 62.909235][ T39] out_of_memory+0xc78/0xf70 [ 62.910032][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 62.911078][ T39] try_charge_memcg+0xa4c/0x1390 [ 62.911982][ T39] charge_memcg+0xa4/0x1f0 [ 62.912774][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 62.913874][ T39] __read_swap_cache_async+0x378/0x688 [ 62.914845][ T39] swap_cluster_readahead+0x328/0x818 [ 62.915749][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 62.916634][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 62.917533][ T39] shmem_file_read_iter+0x210/0x954 [ 62.918401][ T39] do_iter_read+0x4d4/0x8b4 [ 62.919202][ T39] vfs_iter_read+0x88/0xac [ 62.919964][ T39] loop_process_work+0xbf0/0x200c [ 62.920836][ T39] loop_rootcg_workfn+0x28/0x38 [ 62.921659][ T39] process_one_work+0x7e4/0x13bc [ 62.922524][ T39] worker_thread+0x8cc/0xfe8 [ 62.923327][ T39] kthread+0x254/0x2e0 [ 62.924049][ T39] ret_from_fork+0x10/0x20 [ 62.924908][ T39] memory: usage 76kB, limit 96kB, failcnt 229081 [ 62.925936][ T39] memory+swap: usage 2304kB, limit 9007199254740988kB, failcnt 0 [ 62.927202][ T39] kmem: usage 28kB, limit 9007199254740988kB, failcnt 0 [ 62.928376][ T39] Memory cgroup stats for /syz0/test: [ 62.928435][ T39] anon 0 [ 62.928435][ T39] file 40960 [ 62.928435][ T39] kernel 28672 [ 62.928435][ T39] kernel_stack 0 [ 62.928435][ T39] pagetables 0 [ 62.928435][ T39] sec_pagetables 0 [ 62.928435][ T39] percpu 0 [ 62.928435][ T39] sock 0 [ 62.928435][ T39] vmalloc 0 [ 62.928435][ T39] shmem 36864 [ 62.928435][ T39] zswap 0 [ 62.928435][ T39] zswapped 0 [ 62.928435][ T39] file_mapped 0 [ 62.928435][ T39] file_dirty 0 [ 62.928435][ T39] file_writeback 0 [ 62.928435][ T39] swapcached 103522304 [ 62.928435][ T39] anon_thp 0 [ 62.928435][ T39] file_thp 0 [ 62.928435][ T39] shmem_thp 0 [ 62.928435][ T39] inactive_anon 0 [ 62.928435][ T39] active_anon 40960 [ 62.928435][ T39] inactive_file 0 [ 62.928435][ T39] active_file 8192 [ 62.928435][ T39] unevictable 0 [ 62.928435][ T39] slab_reclaimable 21832 [ 62.928435][ T39] slab_unreclaimable 3896 [ 62.928435][ T39] slab 25728 [ 62.943024][ T39] Out of memory and no killable processes... [ 62.948051][ T39] kworker/u4:2 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 62.950284][ T39] CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted syzkaller #0 [ 62.951501][ T39] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 62.953106][ T39] Workqueue: loop0 loop_rootcg_workfn [ 62.954000][ T39] Call trace: [ 62.954547][ T39] dump_backtrace+0x1c4/0x1f0 [ 62.955298][ T39] show_stack+0x2c/0x3c [ 62.955982][ T39] __dump_stack+0x30/0x40 [ 62.956677][ T39] dump_stack_lvl+0xf4/0x15c [ 62.957468][ T39] dump_stack+0x1c/0x5c [ 62.958138][ T39] dump_header+0xc0/0x724 [ 62.958881][ T39] out_of_memory+0xc78/0xf70 [ 62.959695][ T39] mem_cgroup_out_of_memory+0x228/0x2d0 [ 62.960684][ T39] try_charge_memcg+0xa4c/0x1390 [ 62.961615][ T39] charge_memcg+0xa4/0x1f0 [ 62.962413][ T39] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 62.963499][ T39] __read_swap_cache_async+0x378/0x688 [ 62.964452][ T39] swap_cluster_readahead+0x6c0/0x818 [ 62.965481][ T39] shmem_swapin_folio+0x5c4/0x1170 [ 62.966347][ T39] shmem_get_folio_gfp+0x274/0x2038 [ 62.967295][ T39] shmem_file_read_iter+0x210/0x954 [ 62.968242][ T39] do_iter_read+0x4d4/0x8b4 [ 62.969033][ T39] vfs_iter_read+0x88/0xac [ 62.969777][ T39] loop_process_work+0xbf0/0x200c [ 62.970640][ T39] loop_rootcg_workfn+0x28/0x38 [ 62.971508][ T39] process_one_work+0x7e4/0x13bc [ 62.972357][ T39] worker_thread+0x8cc/0xfe8 [ 62.973172][ T39] kthread+0x254/0x2e0 [ 62.973877][ T39] ret_from_fork+0x10/0x20 [ 62.974701][ T39] memory: usage 96kB, limit 96kB, failcnt 229383 [ 62.975779][ T39] memory+swap: usage 2952kB, limit 9007199254740988kB, failcnt 0 [ 62.977047][ T39] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 62.978728][ T39] Memory cgroup stats for /syz0/test: [ 62.978784][ T39] anon 20480 [ 62.978784][ T39] file 4096 [ 62.978784][ T39] kernel 24576 [ 62.978784][ T39] kernel_stack 0 [ 62.978784][ T39] pagetables 8192 [ 62.978784][ T39] sec_pagetables 0 [ 62.978784][ T39] percpu 0 [ 62.978784][ T39] sock 0 [ 62.978784][ T39] vmalloc 0 [ 62.978784][ T39] shmem 0 [ 62.978784][ T39] zswap 0 [ 62.978784][ T39] zswapped 0 [ 62.978784][ T39] file_mapped 0 [ 62.978784][ T39] file_dirty 0 [ 62.978784][ T39] file_writeback 0 [ 62.978784][ T39] swapcached 104681472 [ 62.978784][ T39] anon_thp 0 [ 62.978784][ T39] file_thp 0 [ 62.978784][ T39] shmem_thp 0 [ 62.978784][ T39] inactive_anon 0 [ 62.978784][ T39] active_anon 32768 [ 62.978784][ T39] inactive_file 0 [ 62.978784][ T39] active_file 4096 [ 62.978784][ T39] unevictable 0 [ 62.978784][ T39] slab_reclaimable 8464 [ 62.978784][ T39] slab_unreclaimable 2272 [ 62.978784][ T39] slab 10736 [ 62.995067][ T39] Out of memory and no killable processes... [ 63.025871][ T4535] loop0: detected capacity change from 0 to 4096 [ 63.031821][ T79] kworker/u4:3 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 63.034079][ T79] CPU: 0 PID: 79 Comm: kworker/u4:3 Not tainted syzkaller #0 [ 63.035249][ T79] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 63.036810][ T79] Workqueue: loop0 loop_rootcg_workfn [ 63.037673][ T79] Call trace: [ 63.038238][ T79] dump_backtrace+0x1c4/0x1f0 [ 63.039078][ T79] show_stack+0x2c/0x3c [ 63.039792][ T79] __dump_stack+0x30/0x40 [ 63.040565][ T79] dump_stack_lvl+0xf4/0x15c [ 63.041382][ T79] dump_stack+0x1c/0x5c [ 63.042069][ T79] dump_header+0xc0/0x724 [ 63.042817][ T79] oom_kill_process+0x35c/0x660 [ 63.043665][ T79] out_of_memory+0xbf0/0xf70 [ 63.044430][ T79] mem_cgroup_out_of_memory+0x228/0x2d0 [ 63.045395][ T79] try_charge_memcg+0xa4c/0x1390 [ 63.046262][ T79] charge_memcg+0xa4/0x1f0 [ 63.047032][ T79] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 63.048094][ T79] __read_swap_cache_async+0x378/0x688 [ 63.049045][ T79] swap_cluster_readahead+0x6c0/0x818 [ 63.050022][ T79] shmem_swapin_folio+0x5c4/0x1170 [ 63.050971][ T79] shmem_get_folio_gfp+0x274/0x2038 [ 63.051965][ T79] shmem_file_read_iter+0x210/0x954 [ 63.052937][ T79] do_iter_read+0x4d4/0x8b4 [ 63.053775][ T79] vfs_iter_read+0x88/0xac [ 63.054564][ T79] loop_process_work+0xbf0/0x200c [ 63.055468][ T79] loop_rootcg_workfn+0x28/0x38 [ 63.056338][ T79] process_one_work+0x7e4/0x13bc [ 63.057250][ T79] worker_thread+0x8cc/0xfe8 [ 63.058106][ T79] kthread+0x254/0x2e0 [ 63.058871][ T79] ret_from_fork+0x10/0x20 [ 63.059783][ T79] memory: usage 96kB, limit 96kB, failcnt 230261 [ 63.060883][ T79] memory+swap: usage 2400kB, limit 9007199254740988kB, failcnt 0 [ 63.062167][ T79] kmem: usage 32kB, limit 9007199254740988kB, failcnt 0 [ 63.063311][ T79] Memory cgroup stats for /syz0/test: [ 63.063399][ T79] anon 0 [ 63.063399][ T79] file 65536 [ 63.063399][ T79] kernel 32768 [ 63.063399][ T79] kernel_stack 0 [ 63.063399][ T79] pagetables 0 [ 63.063399][ T79] sec_pagetables 0 [ 63.063399][ T79] percpu 0 [ 63.063399][ T79] sock 0 [ 63.063399][ T79] vmalloc 0 [ 63.063399][ T79] shmem 40960 [ 63.063399][ T79] zswap 0 [ 63.063399][ T79] zswapped 0 [ 63.063399][ T79] file_mapped 0 [ 63.063399][ T79] file_dirty 0 [ 63.063399][ T79] file_writeback 0 [ 63.063399][ T79] swapcached 107655168 [ 63.063399][ T79] anon_thp 0 [ 63.063399][ T79] file_thp 0 [ 63.063399][ T79] shmem_thp 0 [ 63.063399][ T79] inactive_anon 24576 [ 63.063399][ T79] active_anon 16384 [ 63.063399][ T79] inactive_file 0 [ 63.063399][ T79] active_file 24576 [ 63.063399][ T79] unevictable 0 [ 63.063399][ T79] slab_reclaimable 17392 [ 63.063399][ T79] slab_unreclaimable 5840 [ 63.063399][ T79] slab 23232 [ 63.078940][ T79] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0/test,task_memcg=/syz0/test,task=syz.0.44,pid=4535,uid=0 [ 63.081353][ T79] Memory cgroup out of memory: Killed process 4535 (syz.0.44) total-vm:44868kB, anon-rss:1308kB, file-rss:1036kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000 [ 63.090168][ T79] kworker/u4:3 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 63.092558][ T79] CPU: 0 PID: 79 Comm: kworker/u4:3 Not tainted syzkaller #0 [ 63.093863][ T79] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 63.095615][ T79] Workqueue: loop0 loop_rootcg_workfn [ 63.096553][ T79] Call trace: [ 63.097107][ T79] dump_backtrace+0x1c4/0x1f0 [ 63.097919][ T79] show_stack+0x2c/0x3c [ 63.098715][ T79] __dump_stack+0x30/0x40 [ 63.099515][ T79] dump_stack_lvl+0xf4/0x15c [ 63.100345][ T79] dump_stack+0x1c/0x5c [ 63.101103][ T79] dump_header+0xc0/0x724 [ 63.101869][ T79] out_of_memory+0xc78/0xf70 [ 63.102688][ T79] mem_cgroup_out_of_memory+0x228/0x2d0 [ 63.103846][ T79] try_charge_memcg+0xa4c/0x1390 [ 63.104874][ T79] charge_memcg+0xa4/0x1f0 [ 63.105733][ T79] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 63.106828][ T79] __read_swap_cache_async+0x378/0x688 [ 63.107797][ T79] swap_cluster_readahead+0x6c0/0x818 [ 63.108715][ T79] shmem_swapin_folio+0x5c4/0x1170 [ 63.109576][ T79] shmem_get_folio_gfp+0x274/0x2038 [ 63.110478][ T79] shmem_file_read_iter+0x210/0x954 [ 63.111433][ T79] do_iter_read+0x4d4/0x8b4 [ 63.112194][ T79] vfs_iter_read+0x88/0xac [ 63.112969][ T79] loop_process_work+0xbf0/0x200c [ 63.113859][ T79] loop_rootcg_workfn+0x28/0x38 [ 63.114688][ T79] process_one_work+0x7e4/0x13bc [ 63.115550][ T79] worker_thread+0x8cc/0xfe8 [ 63.116301][ T79] kthread+0x254/0x2e0 [ 63.117017][ T79] ret_from_fork+0x10/0x20 [ 63.118045][ T79] memory: usage 96kB, limit 96kB, failcnt 230383 [ 63.119150][ T79] memory+swap: usage 2204kB, limit 9007199254740988kB, failcnt 0 [ 63.120435][ T79] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 63.121584][ T79] Memory cgroup stats for /syz0/test: [ 63.121669][ T79] anon 0 [ 63.121669][ T79] file 65536 [ 63.121669][ T79] kernel 24576 [ 63.121669][ T79] kernel_stack 0 [ 63.121669][ T79] pagetables 0 [ 63.121669][ T79] sec_pagetables 0 [ 63.121669][ T79] percpu 0 [ 63.121669][ T79] sock 0 [ 63.121669][ T79] vmalloc 0 [ 63.121669][ T79] shmem 61440 [ 63.121669][ T79] zswap 0 [ 63.121669][ T79] zswapped 0 [ 63.121669][ T79] file_mapped 0 [ 63.121669][ T79] file_dirty 0 [ 63.121669][ T79] file_writeback 0 [ 63.121669][ T79] swapcached 107655168 [ 63.121669][ T79] anon_thp 0 [ 63.121669][ T79] file_thp 0 [ 63.121669][ T79] shmem_thp 0 [ 63.121669][ T79] inactive_anon 24576 [ 63.121669][ T79] active_anon 36864 [ 63.121669][ T79] inactive_file 0 [ 63.121669][ T79] active_file 12288 [ 63.121669][ T79] unevictable 0 [ 63.121669][ T79] slab_reclaimable 18552 [ 63.121669][ T79] slab_unreclaimable 3896 [ 63.121669][ T79] slab 22448 [ 63.136748][ T79] Out of memory and no killable processes... [ 63.142349][ T79] kworker/u4:3 invoked oom-killer: gfp_mask=0x100c0a(GFP_NOIO|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE), order=0, oom_score_adj=0 [ 63.144604][ T79] CPU: 0 PID: 79 Comm: kworker/u4:3 Not tainted syzkaller #0 [ 63.145852][ T79] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 63.147502][ T79] Workqueue: loop0 loop_rootcg_workfn [ 63.148400][ T79] Call trace: [ 63.148975][ T79] dump_backtrace+0x1c4/0x1f0 [ 63.149812][ T79] show_stack+0x2c/0x3c [ 63.150553][ T79] __dump_stack+0x30/0x40 [ 63.151333][ T79] dump_stack_lvl+0xf4/0x15c [ 63.152127][ T79] dump_stack+0x1c/0x5c [ 63.152859][ T79] dump_header+0xc0/0x724 [ 63.153618][ T79] out_of_memory+0xc78/0xf70 [ 63.154418][ T79] mem_cgroup_out_of_memory+0x228/0x2d0 [ 63.155342][ T79] try_charge_memcg+0xa4c/0x1390 [ 63.156210][ T79] charge_memcg+0xa4/0x1f0 [ 63.157001][ T79] mem_cgroup_swapin_charge_folio+0x270/0x3d4 [ 63.158054][ T79] __read_swap_cache_async+0x378/0x688 [ 63.158993][ T79] swap_cluster_readahead+0x6c0/0x818 [ 63.159922][ T79] shmem_swapin_folio+0x5c4/0x1170 [ 63.160815][ T79] shmem_get_folio_gfp+0x274/0x2038 [ 63.161749][ T79] shmem_file_read_iter+0x210/0x954 [ 63.162675][ T79] do_iter_read+0x4d4/0x8b4 [ 63.163493][ T79] vfs_iter_read+0x88/0xac [ 63.164283][ T79] loop_process_work+0xbf0/0x200c [ 63.165160][ T79] loop_rootcg_workfn+0x28/0x38 [ 63.166049][ T79] process_one_work+0x7e4/0x13bc [ 63.166900][ T79] worker_thread+0x8cc/0xfe8 [ 63.167709][ T79] kthread+0x254/0x2e0 [ 63.168436][ T79] ret_from_fork+0x10/0x20 [ 63.169477][ T79] memory: usage 96kB, limit 96kB, failcnt 230524 [ 63.170859][ T79] memory+swap: usage 2468kB, limit 9007199254740988kB, failcnt 0 [ 63.172243][ T79] kmem: usage 24kB, limit 9007199254740988kB, failcnt 0 [ 63.173446][ T79] Memory cgroup stats for /syz0/test: [ 63.173527][ T79] anon 28672 [ 63.173527][ T79] file 4096 [ 63.173527][ T79] kernel 24576 [ 63.173527][ T79] kernel_stack 0 [ 63.173527][ T79] pagetables 8192 [ 63.173527][ T79] sec_pagetables 0 [ 63.173527][ T79] percpu 0 [ 63.173527][ T79] sock 0 [ 63.173527][ T79] vmalloc 0 [ 63.173527][ T79] shmem 0 [ 63.173527][ T79] zswap 0 [ 63.173527][ T79] zswapped 0 [ 63.173527][ T79] file_mapped 0 [ 63.173527][ T79] file_dirty 0 [ 63.173527][ T79] file_writeback 0 [ 63.173527][ T79] swapcached 108249088 [ 63.173527][ T79] anon_thp 0 [ 63.173527][ T79] file_thp 0 [ 63.173527][ T79] shmem_thp 0 [ 63.173527][ T79] inactive_anon 0 [ 63.173527][ T79] active_anon 28672 [ 63.173527][ T79] inactive_file 0 [ 63.173527][ T79] active_file 4096 [ 63.173527][ T79] unevictable 0 [ 63.173527][ T79] slab_reclaimable 8464 [ 63.