INFO: task syz-executor.3:1390 blocked for more than 143 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27736 pid: 1390 ppid: 1030 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9746
io_uring_clean_tctx fs/io_uring.c:9762 [inline]
io_uring_cancel_generic+0x5d5/0x690 fs/io_uring.c:9851
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2852
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0c9bc1aae9
RSP: 002b:00007f0c99190218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f0c9bd2df68 RCX: 00007f0c9bc1aae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0c9bd2df68
RBP: 00007f0c9bd2df60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c9bd2df6c
R13: 00007f0c9c261b2f R14: 00007f0c99190300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83ca0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6246:
#0: ffff88807180a5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by kworker/u4:9/9030:
1 lock held by syz-executor.3/1390:
#0: ffff888034ddf0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9746
1 lock held by syz-executor.3/1397:
1 lock held by syz-executor.3/1400:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
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: 30 Comm: kcompactd0 Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:task_irq_context kernel/locking/lockdep.c:4535 [inline]
RIP: 0010:__lock_acquire+0x311/0x54a0 kernel/locking/lockdep.c:4965
Code: 48 ba 00 00 00 00 00 fc ff df 48 89 f1 48 89 74 24 40 49 89 44 24 18 65 8b 05 d3 27 a6 7e 85 c0 0f 95 c0 48 c1 e9 03 83 e6 07 <0f> b6 0c 11 48 89 f2 0f b6 c0 83 c2 03 01 c0 38 ca 7c 08 84 c9 0f
RSP: 0018:ffffc90000e5f8f8 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffffffff906734a0 RCX: 1ffff110026b5c28
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8880135ae170
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880135ae160
R13: ffff8880135ad700 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feac9442000 CR3: 000000000b88e000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
debug_object_assert_init lib/debugobjects.c:877 [inline]
debug_object_assert_init+0x101/0x2e0 lib/debugobjects.c:866
debug_timer_assert_init kernel/time/timer.c:739 [inline]
debug_assert_init kernel/time/timer.c:784 [inline]
try_to_del_timer_sync+0x6d/0x110 kernel/time/timer.c:1229
del_timer_sync+0x138/0x1b0 kernel/time/timer.c:1382
schedule_timeout+0x152/0x2a0 kernel/time/timer.c:1882
freezable_schedule_timeout include/linux/freezer.h:192 [inline]
kcompactd+0xa5d/0xf30 mm/compaction.c:2936
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
7: fc ff df
a: 48 89 f1 mov %rsi,%rcx
d: 48 89 74 24 40 mov %rsi,0x40(%rsp)
12: 49 89 44 24 18 mov %rax,0x18(%r12)
17: 65 8b 05 d3 27 a6 7e mov %gs:0x7ea627d3(%rip),%eax # 0x7ea627f1
1e: 85 c0 test %eax,%eax
20: 0f 95 c0 setne %al
23: 48 c1 e9 03 shr $0x3,%rcx
27: 83 e6 07 and $0x7,%esi
* 2a: 0f b6 0c 11 movzbl (%rcx,%rdx,1),%ecx <-- trapping instruction
2e: 48 89 f2 mov %rsi,%rdx
31: 0f b6 c0 movzbl %al,%eax
34: 83 c2 03 add $0x3,%edx
37: 01 c0 add %eax,%eax
39: 38 ca cmp %cl,%dl
3b: 7c 08 jl 0x45
3d: 84 c9 test %cl,%cl
3f: 0f .byte 0xf