INFO: task syz-executor.1:11050 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27776 pid:11050 ppid: 6519 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
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/0x2220 kernel/signal.c:2830
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: 0033:0x7f03b01e4ae7
RSP: 002b:00007f03ad75a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f03b02f7f68 RCX: 00007f03b01e4ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f03b02f7f68
RBP: 00007f03b02f7f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f03b02f7f6c
R13: 00007ffee92d9b9f R14: 00007f03ad75a300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by kworker/u4:6/6980:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-next-20211106-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:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6980 Comm: kworker/u4:6 Not tainted 5.15.0-next-20211106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5378 [inline]
RIP: 0010:lock_is_held_type+0x90/0x140 kernel/locking/lockdep.c:5680
Code: 24 60 0a 00 00 4d 8d ac 24 68 0a 00 00 65 ff 05 c6 ef b2 76 85 c0 7f 12 e9 8a 00 00 00 83 c3 01 41 3b 9c 24 60 0a 00 00 7d 7d <48> 63 c3 48 89 ee 48 8d 04 80 4d 8d 7c c5 00 4c 89 ff e8 99 fe ff
RSP: 0018:ffffc900044d7880 EFLAGS: 00000097
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8bb839a0 RDI: ffff88807d18c510
RBP: ffffffff8bb839a0 R08: 0000000000000000 R09: ffffffff8d912bd7
R10: fffffbfff1b2257a R11: 0000000000000000 R12: ffff88807d18ba80
R13: ffff88807d18c4e8 R14: 00000000ffffffff R15: ffff88807d18c510
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb2b36f000 CR3: 000000000b88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5608
__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:748 [inline]
toggle_allocation_gate+0x1c8/0x390 mm/kfence/core.c:724
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: 24 60 and $0x60,%al
2: 0a 00 or (%rax),%al
4: 00 4d 8d add %cl,-0x73(%rbp)
7: ac lods %ds:(%rsi),%al
8: 24 68 and $0x68,%al
a: 0a 00 or (%rax),%al
c: 00 65 ff add %ah,-0x1(%rbp)
f: 05 c6 ef b2 76 add $0x76b2efc6,%eax
14: 85 c0 test %eax,%eax
16: 7f 12 jg 0x2a
18: e9 8a 00 00 00 jmpq 0xa7
1d: 83 c3 01 add $0x1,%ebx
20: 41 3b 9c 24 60 0a 00 cmp 0xa60(%r12),%ebx
27: 00
28: 7d 7d jge 0xa7
* 2a: 48 63 c3 movslq %ebx,%rax <-- trapping instruction
2d: 48 89 ee mov %rbp,%rsi
30: 48 8d 04 80 lea (%rax,%rax,4),%rax
34: 4d 8d 7c c5 00 lea 0x0(%r13,%rax,8),%r15
39: 4c 89 ff mov %r15,%rdi
3c: e8 .byte 0xe8
3d: 99 cltd
3e: fe (bad)
3f: ff .byte 0xff