ci2-upstream-fs/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-upstream-fs/syz-executor3523709586 <...> Warning: Permanently added '10.128.0.240' (ED25519) to the list of known hosts. execve("ci2-upstream-fs/syz-executor3523709586", ["ci2-upstream-fs/syz-executor3523709586"], 0x7fffdf7e0f20 /* 10 vars */) = 0 brk(NULL) = 0x55558394b000 brk(0x55558394bd80) = 0x55558394bd80 arch_prctl(ARCH_SET_FS, 0x55558394b400) = 0 set_tid_address(0x55558394b6d0) = 5630 set_robust_list(0x55558394b6e0, 24) = 0 rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 33, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci2-upstream-fs/syz-executor3523709586", 4096) = 44 getrandom("\xad\x2d\x45\x00\xd0\x03\xbe\xf8", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558394bd80 brk(0x55558396cd80) = 0x55558396cd80 brk(0x55558396d000) = 0x55558396d000 mprotect(0x7f0f3433e000, 20480, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5631 attached , child_tidptr=0x55558394b6d0) = 5631 [pid 5630] rt_sigprocmask(SIG_SETMASK, [] [pid 5631] set_robust_list(0x55558394b6e0, 24 [pid 5630] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5631] <... set_robust_list resumed>) = 0 [pid 5631] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5631] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5631] setpgid(0, 0) = 0 [pid 5631] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5631] write(3, "1000", 4) = 4 [pid 5631] close(3) = 0 [pid 5631] write(1, "executing program\n", 18) = 18 executing program [pid 5631] memfd_create("syzkaller", 0) = 3 [pid 5631] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0f2be86000 [pid 5631] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 65536) = 65536 [pid 5631] munmap(0x7f0f2be86000, 138412032) = 0 [pid 5631] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5631] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5631] close(3) = 0 [pid 5631] close(4) = 0 [pid 5631] mkdir("./mnt", 0777) = 0 [ 268.946055][ T5631] loop0: detected capacity change from 0 to 128 [ 268.986311][ T5631] EXT4-fs (loop0): ext4_check_descriptors: Checksum for group 0 failed (30846!=65535) [pid 5631] mount("/dev/loop0", "./mnt", "ext4", MS_RDONLY|MS_NOSUID|MS_I_VERSION, "max_batch_time=0x0000000000000005,errors=continue,inode_readahead_blks=0x0000000000800000,,errors=co"... [pid 5630] kill(-5631, SIGKILL) = 0 [pid 5630] kill(5631, SIGKILL) = 0 [pid 5630] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5630] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5630] getdents64(3, 0x55558394c790 /* 2 entries */, 32768) = 48 [pid 5630] getdents64(3, 0x55558394c790 /* 0 entries */, 32768) = 0 [pid 5630] close(3) = 0 [ 329.073778][ T4947] udevd[4947]: worker [5632] /devices/virtual/block/loop0 is taking a long time [ 429.908659][ T38] INFO: task udevd:5632 blocked in I/O wait[ 429.908659][ T38] INFO: task udevd:5632 blocked in I/O wait for more than 143 seconds. [ 429.908696][ T38] Not tainted syzkaller #0 [ 429.908708][ T38] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.908718][ T38] task:udevd state:D stack:25128 pid:5632 tgid:5632 ppid:4947 task_flags:0x400140 flags:0x00080000 [ 429.908811][ T38] Call Trace: [ 429.908819][ T38] [ 429.908834][ T38] __schedule+0x16dc/0x5500 [ 429.908928][ T38] ? _raw_spin_unlock_irqrestore+0x30/0x80 [ 429.908965][ T38] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 429.909000][ T38] ? __pfx___schedule+0x10/0x10 [ 429.909028][ T38] ? schedule+0x90/0x2b0 [ 429.909068][ T38] ? schedule+0x90/0x2b0 [ 429.909111][ T38] schedule+0x164/0x2b0 [ 429.909144][ T38] io_schedule+0x80/0xe0 [ 429.909176][ T38] bit_wait_io+0x11/0xd0 [ 429.909211][ T38] __wait_on_bit_lock+0xe0/0x4a0 [ 429.909249][ T38] ? __pfx_bit_wait_io+0x10/0x10 [ 429.909286][ T38] out_of_line_wait_on_bit_lock+0x13b/0x190 [ 429.909321][ T38] ? __pfx_bit_wait_io+0x10/0x10 [ 429.909353][ T38] ? __pfx_out_of_line_wait_on_bit_lock+0x10/0x10 [ 429.909392][ T38] ? __pfx_wake_bit_function+0x10/0x10 [ 429.909437][ T38] ? block_read_full_folio+0x317/0x810 [ 429.909474][ T38] block_read_full_folio+0x38f/0x810 [ 429.909514][ T38] ? __pfx_blkdev_get_block+0x10/0x10 [ 429.909548][ T38] filemap_read_folio+0x12c/0x3a0 [ 429.909582][ T38] ? __pfx_blkdev_read_folio+0x10/0x10 [ 429.909613][ T38] ? __pfx_filemap_read_folio+0x10/0x10 [ 429.909652][ T38] ? __pfx_mmap_region+0x10/0x10 [ 429.909687][ T38] filemap_get_pages+0x16f9/0x1e80 [ 429.909767][ T38] ? __pfx_filemap_get_pages+0x10/0x10 [ 429.909828][ T38] filemap_read+0x429/0x11e0 [ 429.909859][ T38] ? __lock_acquire+0x683/0x2ce0 [ 429.911364][ T38] ? __pfx_filemap_read+0x10/0x10 [ 429.911427][ T38] ? __pfx_down_read+0x10/0x10 [ 429.911463][ T38] ? do_raw_spin_lock+0x12b/0x2f0 [ 429.911502][ T38] blkdev_read_iter+0x2f8/0x430 [ 429.911543][ T38] vfs_read+0x59e/0xa90 [ 429.911580][ T38] ? __pfx_vfs_read+0x10/0x10 [ 429.911609][ T38] ? lockdep_hardirqs_on+0x7a/0x110 [ 429.911642][ T38] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 429.911690][ T38] ksys_read+0x156/0x270 [ 429.911720][ T38] ? __pfx_ksys_read+0x10/0x10 [ 429.911756][ T38] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.911782][ T38] do_syscall_64+0x174/0x580 [ 429.911815][ T38] ? trace_irq_disable+0x3b/0x140 [ 429.911851][ T38] ? clear_bhb_loop+0x70/0xc0 [ 429.911879][ T38] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.911902][ T38] RIP: 0033:0x7fe4da3d2407 [ 429.911929][ T38] RSP: 002b:00007fff5214e0c0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 429.911953][ T38] RAX: ffffffffffffffda RBX: 00007fe4da2e4880 RCX: 00007fe4da3d2407 [ 429.911970][ T38] RDX: 0000000000000200 RSI: 00007fe4d9995000 RDI: 0000000000000009 [ 429.911984][ T38] RBP: 000055dd1c8fe050 R08: 0000000000000000 R09: 0000000000000000 [ 429.911998][ T38] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 429.912010][ T38] R13: 0000000000008000 R14: 000055dd1c907578 R15: 00007fe4dab2839c [ 429.912046][ T38] [ 429.912063][ T38] [ 429.912063][ T38] Showing all locks held in the system: [ 429.912076][ T38] 1 lock held by khungtaskd/38: [ 429.912088][ T38] #0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 429.912155][ T38] 1 lock held by kswapd1/95: [ 429.912188][ T38] 2 locks held by getty/5336: [ 429.912200][ T38] #0: ffff888032e220a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 429.912255][ T38] #1: ffffc90003cbe2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 [ 429.912320][ T38] 1 lock held by syz-executor352/5631: [ 429.912333][ T38] 2 locks held by udevd/5632: [ 429.912344][ T38] #0: ffff8880236dbe48 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_read_iter+0x2e6/0x430 [ 429.912411][ T38] #1: ffff8880236dc018 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_get_pages+0x936/0x1e80 [ 429.912474][ T38] [ 429.912480][ T38] ============================================= [ 429.912480][ T38] [ 429.912495][ T38] NMI backtrace for cpu 1 [ 429.912522][ T38] CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 429.912573][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 429.912586][ T38] Call Trace: [ 429.912594][ T38] [ 429.912602][ T38] dump_stack_lvl+0xe8/0x150 [ 429.912637][ T38] nmi_cpu_backtrace+0x274/0x2d0 [ 429.912664][ T38] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 429.912699][ T38] nmi_trigger_cpumask_backtrace+0x17a/0x380 [ 429.912730][ T38] sys_info+0x135/0x170 [ 429.912754][ T38] watchdog+0xfd7/0x1030 [ 429.912800][ T38] ? watchdog+0x1c7/0x1030 [ 429.912842][ T38] kthread+0x388/0x470 [ 429.912872][ T38] ? __pfx_watchdog+0x10/0x10 [ 429.912904][ T38] ? __pfx_kthread+0x10/0x10 [ 429.912937][ T38] ret_from_fork+0x514/0xb70 [ 429.912973][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 429.913005][ T38] ? __switch_to+0xc89/0x1420 [ 429.913036][ T38] ? __pfx_kthread+0x10/0x10 [ 429.913068][ T38] ret_from_fork_asm+0x1a/0x30 [ 429.913126][ T38] [ 429.913163][ T38] Sending NMI from CPU 1 to CPUs 0: [ 429.913195][ C0] NMI backtrace for cpu 0 [ 429.913216][ C0] CPU: 0 UID: 0 PID: 5631 Comm: syz-executor352 Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 429.913237][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 429.913247][ C0] RIP: 0010:lock_acquire+0x0/0x350 [ 429.913266][ C0] Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa b0 01 c3 cc cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 60 4d 89 ce 45 [ 429.913282][ C0] RSP: 0018:ffffc900045e6fd0 EFLAGS: 00000246 [ 429.913297][ C0] RAX: 0000000000000001 RBX: ffffffff822f0cdc RCX: 0000000000000002 [ 429.913310][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e1c3000 [ 429.913321][ C0] RBP: 1ffff920008bce18 R08: 0000000000000000 R09: 0000000000000000 [ 429.913333][ C0] R10: ffffc900045e70d8 R11: ffffffff81b0b5e0 R12: dffffc0000000000 [ 429.913346][ C0] R13: ffffffff8177725f R14: ffffc900045e7088 R15: 1ffff920008bce11 [ 429.913360][ C0] FS: 000055558394b400(0000) GS:ffff888125c45000(0000) knlGS:0000000000000000 [ 429.913376][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 429.913388][ C0] CR2: 0000560f3f851168 CR3: 00000000445dc000 CR4: 00000000003526f0 [ 429.913405][ C0] Call Trace: [ 429.913411][ C0] [ 429.913417][ C0] unwind_next_frame+0xac/0x2550 [ 429.913435][ C0] ? unwind_next_frame+0x8f/0x2550 [ 429.913456][ C0] ? kasan_save_track+0x3e/0x80 [ 429.913484][ C0] ? unwind_next_frame+0x8f/0x2550 [ 429.913503][ C0] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 429.913532][ C0] arch_stack_walk+0x11b/0x150 [ 429.913552][ C0] ? __kasan_slab_alloc+0x6c/0x80 [ 429.913572][ C0] stack_trace_save+0xa9/0x100 [ 429.913605][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 429.913633][ C0] ? stack_depot_save_flags+0x33/0x800 [ 429.913659][ C0] ? __lock_acquire+0x5e1/0x2ce0 [ 429.913677][ C0] kasan_save_track+0x3e/0x80 [ 429.913704][ C0] ? kasan_save_track+0x3e/0x80 [ 429.913731][ C0] ? __kasan_slab_alloc+0x6c/0x80 [ 429.913774][ C0] __kasan_slab_alloc+0x6c/0x80 [ 429.913792][ C0] kmem_cache_alloc_noprof+0x355/0x650 [ 429.913825][ C0] ? alloc_buffer_head+0x2a/0x280 [ 429.913849][ C0] ? alloc_buffer_head+0x2a/0x280 [ 429.913876][ C0] alloc_buffer_head+0x2a/0x280 [ 429.913898][ C0] ? folio_alloc_buffers+0x293/0x6f0 [ 429.913923][ C0] folio_alloc_buffers+0x1f9/0x6f0 [ 429.913951][ C0] bdev_getblk+0x2c3/0x6e0 [ 429.913981][ C0] ext4_sb_breadahead_unmovable+0x6f/0xf0 [ 429.914013][ C0] __ext4_get_inode_loc+0xb03/0xf40 [ 429.914049][ C0] ? __pfx___ext4_get_inode_loc+0x10/0x10 [ 429.914084][ C0] __ext4_iget+0x44e/0x45b0 [ 429.914111][ C0] ? is_dynamic_key+0xd4/0x1c0 [ 429.914147][ C0] ? ext4_calculate_overhead+0x1062/0x1260 [ 429.914172][ C0] ? __pfx___ext4_iget+0x10/0x10 [ 429.914197][ C0] ? lockdep_hardirqs_on+0x7a/0x110 [ 429.914228][ C0] ext4_fill_super+0x4de1/0x65d0 [ 429.914258][ C0] ? __pfx_ext4_fill_super+0x10/0x10 [ 429.914276][ C0] ? snprintf+0xe8/0x140 [ 429.914296][ C0] ? __pfx_rt_mutex_slowunlock+0x10/0x10 [ 429.914319][ C0] ? __pfx_snprintf+0x10/0x10 [ 429.914344][ C0] ? sb_set_blocksize+0x11b/0x210 [ 429.914366][ C0] ? setup_bdev_super+0x4c1/0x5b0 [ 429.914390][ C0] get_tree_bdev_flags+0x430/0x4f0 [ 429.914412][ C0] ? __pfx_ext4_fill_super+0x10/0x10 [ 429.914430][ C0] ? __pfx_get_tree_bdev_flags+0x10/0x10 [ 429.914453][ C0] ? safesetid_security_capable+0xa9/0x1a0 [ 429.914474][ C0] vfs_get_tree+0x92/0x2a0 [ 429.914497][ C0] do_new_mount+0x319/0xdc0 [ 429.914525][ C0] ? cap_capable+0x123/0x460 [ 429.914556][ C0] ? __pfx_do_new_mount+0x10/0x10 [ 429.914585][ C0] ? ns_capable+0x89/0xe0 [ 429.914613][ C0] ? path_mount+0x647/0x1040 [ 429.914642][ C0] ? user_path_at+0xd4/0x160 [ 429.914662][ C0] __se_sys_mount+0x31d/0x420 [ 429.914682][ C0] ? __pfx___se_sys_mount+0x10/0x10 [ 429.914702][ C0] ? __x64_sys_mount+0x20/0xc0 [ 429.914717][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.914736][ C0] do_syscall_64+0x174/0x580 [ 429.914762][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.914780][ C0] ? clear_bhb_loop+0x70/0xc0 [ 429.914801][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.914818][ C0] RIP: 0033:0x7f0f342b2d2a [ 429.914834][ C0] Code: 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 64 0d 09 00 00 00 00 00 eb 96 e8 51 05 00 00 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 d8 ff ff ff f7 d8 64 89 01 48 [ 429.914849][ C0] RSP: 002b:00007ffe6763fca8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 [ 429.914866][ C0] RAX: ffffffffffffffda RBX: 00007ffe6763fcc0 RCX: 00007f0f342b2d2a [ 429.914880][ C0] RDX: 0000200000000240 RSI: 0000200000000280 RDI: 00007ffe6763fcc0 [ 429.914893][ C0] RBP: 0000200000000280 R08: 00007ffe6763fd00 R09: 00007ffe6763fd00 [ 429.914906][ C0] R10: 0000000000800003 R11: 0000000000000206 R12: 0000200000000240 [ 429.914918][ C0] R13: 0000000000000004 R14: 0000000000000003 R15: 00007ffe6763fd00 [ 429.914939][ C0] [ 429.914946][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.751 msecs [ 429.921375][ T38] Kernel panic - not syncing: hung_task: blocked tasks [ 429.921448][ T38] CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 429.921532][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 429.921564][ T38] Call Trace: [ 429.921584][ T38] [ 429.921600][ T38] vpanic+0x56c/0xa60 [ 429.921689][ T38] ? __pfx___schedule+0x10/0x10 [ 429.921771][ T38] ? __pfx_vpanic+0x10/0x10 [ 429.921880][ T38] panic+0xc5/0xd0 [ 429.921961][ T38] ? __pfx_panic+0x10/0x10 [ 429.922043][ T38] ? preempt_schedule_common+0x82/0xd0 [ 429.922139][ T38] ? preempt_schedule_thunk+0x16/0x40 [ 429.922203][ T38] ? nmi_trigger_cpumask_backtrace+0x314/0x380 [ 429.922286][ T38] ? nmi_trigger_cpumask_backtrace+0x319/0x380 [ 429.922368][ T38] watchdog+0x1030/0x1030 [ 429.922473][ T38] ? watchdog+0x1c7/0x1030 [ 429.922571][ T38] kthread+0x388/0x470 [ 429.922657][ T38] ? __pfx_watchdog+0x10/0x10 [ 429.922738][ T38] ? __pfx_kthread+0x10/0x10 [ 429.922861][ T38] ret_from_fork+0x514/0xb70 [ 429.922963][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 429.923049][ T38] ? __switch_to+0xc89/0x1420 [ 429.923120][ T38] ? __pfx_kthread+0x10/0x10 [ 429.923205][ T38] ret_from_fork_asm+0x1a/0x30 [ 429.923327][ T38] [ 429.923526][ T38] Kernel Offset: disabled