INFO: task syz-executor.0:10109 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28152 pid:10109 ppid: 6502 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9850
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/0x21d0 kernel/signal.c:2820
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: 0033:0x7fea5ddb9ae9
RSP: 002b:00007fea5b30e218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fea5decd028 RCX: 00007fea5ddb9ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fea5decd028
RBP: 00007fea5decd020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fea5decd02c
R13: 00007fea5e400b2f R14: 00007fea5b30e300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
2 locks held by kworker/u4:6/2433:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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: 2433 Comm: kworker/u4:6 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3682 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3702 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3757 [inline]
RIP: 0010:__lock_acquire+0x167f/0x54a0 kernel/locking/lockdep.c:5015
Code: ca 8f 48 89 c2 48 89 44 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 10 3b 00 00 48 8b 1c ed 60 b9 ca 8f <48> 85 db 74 58 48 83 eb 08 74 52 48 ba 00 00 00 00 00 fc ff df eb
RSP: 0018:ffffc9000a687790 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff8f086d08 RCX: ffffffff815c902f
RDX: 1ffffffff1f9d6ba RSI: 0000000000000008 RDI: ffffffff8fd3ba00
RBP: 0000000000007f8e R08: 0000000000000000 R09: ffffffff8fd3ba07
R10: fffffbfff1fa7740 R11: 0000000000000000 R12: ffff888021b144d8
R13: ffff888021b13a00 R14: 0000000000000000 R15: 3469074b3b3f0742
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0728f9020 CR3: 000000000b68e000 CR4: 00000000003506e0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5625 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
__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_activate+0x12e/0x3e0 lib/debugobjects.c:661
debug_timer_activate kernel/time/timer.c:729 [inline]
__mod_timer+0x77d/0xe30 kernel/time/timer.c:1050
__queue_delayed_work+0x1a7/0x270 kernel/workqueue.c:1678
queue_delayed_work_on+0x105/0x120 kernel/workqueue.c:1703
queue_delayed_work include/linux/workqueue.h:517 [inline]
toggle_allocation_gate mm/kfence/core.c:642 [inline]
toggle_allocation_gate+0x1c8/0x390 mm/kfence/core.c:618
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: ca 8f 48 lret $0x488f
3: 89 c2 mov %eax,%edx
5: 48 89 44 24 08 mov %rax,0x8(%rsp)
a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
11: fc ff df
14: 48 c1 ea 03 shr $0x3,%rdx
18: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
1c: 0f 85 10 3b 00 00 jne 0x3b32
22: 48 8b 1c ed 60 b9 ca mov -0x703546a0(,%rbp,8),%rbx
29: 8f
* 2a: 48 85 db test %rbx,%rbx <-- trapping instruction
2d: 74 58 je 0x87
2f: 48 83 eb 08 sub $0x8,%rbx
33: 74 52 je 0x87
35: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
3c: fc ff df
3f: eb .byte 0xeb