INFO: task syz.2.426:5885 blocked for more than 141 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.426 state:D stack:26160 pid:5885 ppid:4279 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
io_schedule+0x7c/0xd0 kernel/sched/core.c:8798
folio_wait_bit_common+0x70a/0xfa0 mm/filemap.c:1324
lock_page include/linux/pagemap.h:997 [inline]
pickup_page_for_submission fs/erofs/zdata.c:1330 [inline]
z_erofs_submit_queue fs/erofs/zdata.c:1522 [inline]
z_erofs_runqueue+0x8fe/0x1c60 fs/erofs/zdata.c:1594
z_erofs_readahead+0xa55/0xdd0 fs/erofs/zdata.c:1733
read_pages+0x185/0x850 mm/readahead.c:161
page_cache_ra_unbounded+0x690/0x770 mm/readahead.c:270
do_page_cache_ra mm/readahead.c:300 [inline]
force_page_cache_ra+0x2bd/0x320 mm/readahead.c:331
force_page_cache_readahead mm/internal.h:125 [inline]
generic_fadvise+0x47a/0x720 mm/fadvise.c:107
vfs_fadvise mm/fadvise.c:185 [inline]
ksys_fadvise64_64 mm/fadvise.c:199 [inline]
__do_sys_fadvise64 mm/fadvise.c:214 [inline]
__se_sys_fadvise64 mm/fadvise.c:212 [inline]
__x64_sys_fadvise64+0x139/0x180 mm/fadvise.c:212
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f84a179aeb9
RSP: 002b:00007f84a2647028 EFLAGS: 00000246 ORIG_RAX: 00000000000000dd
RAX: ffffffffffffffda RBX: 00007f84a1a15fa0 RCX: 00007f84a179aeb9
RDX: 000000000000ff3a RSI: 000000000000aa1f RDI: 0000000000000004
RBP: 00007f84a1808c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f84a1a16038 R14: 00007f84a1a15fa0 R15: 00007fff5dff94a8
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2dfb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2e7d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4028:
#0: ffff8880301b1098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x429/0x1390 drivers/tty/n_tty.c:2198
4 locks held by kworker/u4:17/4586:
3 locks held by kworker/1:10/4979:
2 locks held by kworker/0:9/5279:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc9001baa7d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
1 lock held by syz.2.426/5885:
#0: ffff888054e88338 (mapping.invalidate_lock#6){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
#0: ffff888054e88338 (mapping.invalidate_lock#6){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xd8/0x770 mm/readahead.c:226
1 lock held by syz-executor/6189:
1 lock held by syz.9.662/6939:
2 locks held by sed/6957:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6957 Comm: sed Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:find_stack lib/stackdepot.c:303 [inline]
RIP: 0010:__stack_depot_save+0x153/0x460 lib/stackdepot.c:452
Code: 89 ee c1 c6 04 29 f2 31 d1 c1 c2 0e 29 d1 31 cd c1 c1 18 29 cd 4c 8b 05 13 04 be 12 44 8b 25 08 04 be 12 41 21 ec 4f 8b 2c e0 <4d> 85 ed 74 64 44 89 f9 eb 09 4d 8b 6d 00 4d 85 ed 74 56 41 39 6d
RSP: 0018:ffffc900035671b8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000007337b6a7
RDX: 00000000b6c81e1a RSI: 00000000d1b20d9d RDI: 0000000000000800
RBP: 000000007775d103 R08: ffff88823b400000 R09: 0000000000000001
R10: 00000000443ed063 R11: fffffbfff1c3f866 R12: 000000000005d103
R13: ffff88807f5ee300 R14: ffffc90003567220 R15: 000000000000000e
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f756f5e0ad8 CR3: 00000000570b9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_set_track+0x60/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2d/0x50 mm/kasan/generic.c:516
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1729 [inline]
slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1755
slab_free mm/slub.c:3687 [inline]
kmem_cache_free_bulk+0x348/0x460 mm/slub.c:3805
mt_free_bulk lib/maple_tree.c:164 [inline]
mas_destroy+0x2560/0x2d90 lib/maple_tree.c:5864
mas_store_prealloc+0x33a/0x440 lib/maple_tree.c:5792
vma_expand+0x4c1/0x880 mm/mmap.c:570
__mmap_region mm/mmap.c:2740 [inline]
mmap_region+0xbd2/0x1ca0 mm/mmap.c:2916
do_mmap+0x964/0xfd0 mm/mmap.c:1436
vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:520
ksys_mmap_pgoff+0x516/0x6f0 mm/mmap.c:1482
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0a6db23242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007fffc2c25d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f0a6d7fd000 RCX: 00007f0a6db23242
RDX: 0000000000000001 RSI: 0000000000002000 RDI: 00007f0a6d7fd000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000005000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007fffc2c25dc0
R13: 00007f0a6d8020c0 R14: 00007fffc2c26170 R15: 00000ffff8584baa