INFO: task syz.0.246:7909 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.246 state:D stack:24600 pid:7909 tgid:7908 ppid:6250 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x16dc/0x5500 kernel/sched/core.c:7228
__schedule_loop kernel/sched/core.c:7307 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7322
io_schedule+0x80/0xe0 kernel/sched/core.c:8150
folio_wait_bit_common+0x83c/0xbc0 mm/filemap.c:1324
folio_lock include/linux/pagemap.h:1159 [inline]
release_metapage+0x101/0xa50 fs/jfs/jfs_metapage.c:871
discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
__get_metapage+0x9ac/0xdf0 fs/jfs/jfs_metapage.c:754
dtSearch+0x56c/0x2010 fs/jfs/jfs_dtree.c:621
jfs_lookup+0x1b0/0x420 fs/jfs/namei.c:1464
__lookup_slow+0x1fb/0x2f0 fs/namei.c:1919
lookup_slow+0x53/0x70 fs/namei.c:1936
walk_component fs/namei.c:2282 [inline]
lookup_last fs/namei.c:2789 [inline]
path_lookupat+0x3f5/0x8c0 fs/namei.c:2813
do_o_path+0x9f/0x210 fs/namei.c:4830
path_openat+0x30b6/0x3850 fs/namei.c:4852
do_file_open+0x23e/0x4a0 fs/namei.c:4888
do_sys_openat2+0x115/0x200 fs/open.c:1395
do_sys_open fs/open.c:1401 [inline]
__do_sys_open fs/open.c:1409 [inline]
__se_sys_open fs/open.c:1405 [inline]
__x64_sys_open+0x11e/0x150 fs/open.c:1405
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f543cebce59
RSP: 002b:00007f543b10e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f543d135fa0 RCX: 00007f543cebce59
RDX: 0000000000000001 RSI: 0000000000208101 RDI: 0000200000000040
RBP: 00007f543cf52e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f543d136038 R14: 00007f543d135fa0 R15: 00007ffde78e1ff8
INFO: task syz.0.246:7954 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.246 state:D stack:29208 pid:7954 tgid:7908 ppid:6250 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x16dc/0x5500 kernel/sched/core.c:7228
__schedule_loop kernel/sched/core.c:7307 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7322
d_wait_lookup fs/dcache.c:2749 [inline]
d_alloc_parallel+0xd0c/0x16c0 fs/dcache.c:2834
__lookup_slow+0x82/0x2f0 fs/namei.c:1904
lookup_slow+0x53/0x70 fs/namei.c:1936
walk_component fs/namei.c:2282 [inline]
lookup_last fs/namei.c:2789 [inline]
path_lookupat+0x3f5/0x8c0 fs/namei.c:2813
filename_lookup+0x265/0x5d0 fs/namei.c:2842
do_utimes_path fs/utimes.c:96 [inline]
do_utimes+0x135/0x2c0 fs/utimes.c:139
__do_sys_utime fs/utimes.c:220 [inline]
__se_sys_utime fs/utimes.c:209 [inline]
__x64_sys_utime+0x138/0x200 fs/utimes.c:209
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f543cebce59
RSP: 002b:00007f543b0ed028 EFLAGS: 00000246 ORIG_RAX: 0000000000000084
RAX: ffffffffffffffda RBX: 00007f543d136090 RCX: 00007f543cebce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f543cf52e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f543d136128 R14: 00007f543d136090 R15: 00007ffde78e1ff8
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11474 Comm: syz.3.532 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__set_page_owner+0x22/0x4b0 mm/page_owner.c:337
Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 00 00 00 89 d3 89 74 24 10 <48> 89 7c 24 08 65 48 8b 05 31 0d 3a 10 48 89 44 24 60 49 bd 00 00
RSP: 0018:ffffc9000463f4c0 EFLAGS: 00000286
RAX: ffff8880363c9f00 RBX: 0000000000140cca RCX: 0000000000000000
RDX: 0000000000140cca RSI: 0000000000000000 RDI: ffffea0001b00c40
RBP: ffffc9000463f580 R08: ffffffff8f89baf7 R09: 0000000000000000
R10: ffffed100d806200 R11: fffffbfff1f1375f R12: ffff88806c031000
R13: dffffc0000000000 R14: ffffea0001b00c40 R15: 0000000000000001
FS: 00007f471dd466c0(0000) GS:ffff888126244000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcbf37da08 CR3: 000000003f348000 CR4: 00000000003526f0
Call Trace:
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1859
prep_new_page mm/page_alloc.c:1867 [inline]
get_page_from_freelist+0x262a/0x26a0 mm/page_alloc.c:3946
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304
alloc_pages_mpol+0xce/0x280 mm/mempolicy.c:2490
folio_alloc_mpol_noprof+0x3b/0x1e0 mm/mempolicy.c:2509
shmem_alloc_folio mm/shmem.c:1907 [inline]
shmem_alloc_and_add_folio mm/shmem.c:1949 [inline]
shmem_get_folio_gfp+0x6ee/0x1c40 mm/shmem.c:2502
shmem_get_folio mm/shmem.c:2608 [inline]
shmem_write_begin+0x166/0x320 mm/shmem.c:3239
generic_perform_write+0x2ad/0x8b0 mm/filemap.c:4363
shmem_file_write_iter+0xfb/0x120 mm/shmem.c:3414
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61e/0xbb0 fs/read_write.c:687
ksys_write+0x156/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f471faad68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f471dd45da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f471dd466c0 RCX: 00007f471faad68e
RDX: 0000000001000000 RSI: 00007f4715926000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f471dd45ee0 R14: 00007f471dd45ea0 R15: 00007f4715926000