INFO: task syz-executor.4:20087 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28576 pid:20087 ppid: 8457 flags:0x00024004
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
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9846
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: 0033:0x7fb61718fae9
RSP: 002b:00007fb6146e4218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fb6172a3028 RCX: 00007fb61718fae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fb6172a302c
RBP: 00007fb6172a3020 R08: 000000000000000e R09: 0000000000000000
R10: 00000000000002ff R11: 0000000000000246 R12: 00007fb6172a302c
R13: 00007fb6177d6b2f R14: 00007fb6146e4300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by kworker/u4:2/44:
1 lock held by in:imklog/6447:
#0: ffff88807f0c3270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 44 Comm: kworker/u4:2 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:match_held_lock+0x1/0xc0 kernel/locking/lockdep.c:5085
Code: ee 48 c7 c7 e0 0e ac 89 e8 bb 26 bd ff 48 c7 c7 40 0f ac 89 e8 af 26 bd ff e8 76 e8 cc ff 31 c0 5d c3 0f 1f 80 00 00 00 00 53 <48> 89 fb 48 83 ec 08 48 39 77 10 74 6a 66 f7 47 22 f0 ff 74 5a 48
RSP: 0018:ffffc9000114f830 EFLAGS: 00000093
RAX: 000000000000000f RBX: ffff8880b9c39a98 RCX: 0000000000000000
RDX: 1ffff11002abf14b RSI: ffff8880b9c39a98 RDI: ffff8880155f8ad8
RBP: ffff8880155f8000 R08: 0000000000000000 R09: ffff888022ee1373
R10: 0000000000000000 R11: 000000000000003f R12: ffffed1002abf14b
R13: ffff8880155f8a60 R14: ffff8880155f8ad8 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd31ad5000 CR3: 000000007f511000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_unpin_lock kernel/locking/lockdep.c:5450 [inline]
lock_unpin_lock+0x211/0x3c0 kernel/locking/lockdep.c:5737
rq_unpin_lock kernel/sched/sched.h:1555 [inline]
prepare_lock_switch kernel/sched/core.c:4715 [inline]
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa1b/0x4940 kernel/sched/core.c:6253
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6419
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
on_each_cpu_cond_mask+0x8d/0xa0 kernel/smp.c:1136
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1112 [inline]
text_poke_bp_batch+0x1b3/0x560 arch/x86/kernel/alternative.c:1297
text_poke_flush arch/x86/kernel/alternative.c:1451 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1448 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d5/0x430 kernel/jump_label.c:830
static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate mm/kfence/core.c:732 [inline]
toggle_allocation_gate+0x100/0x390 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: ee out %al,(%dx)
1: 48 c7 c7 e0 0e ac 89 mov $0xffffffff89ac0ee0,%rdi
8: e8 bb 26 bd ff callq 0xffbd26c8
d: 48 c7 c7 40 0f ac 89 mov $0xffffffff89ac0f40,%rdi
14: e8 af 26 bd ff callq 0xffbd26c8
19: e8 76 e8 cc ff callq 0xffcce894
1e: 31 c0 xor %eax,%eax
20: 5d pop %rbp
21: c3 retq
22: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
29: 53 push %rbx
* 2a: 48 89 fb mov %rdi,%rbx <-- trapping instruction
2d: 48 83 ec 08 sub $0x8,%rsp
31: 48 39 77 10 cmp %rsi,0x10(%rdi)
35: 74 6a je 0xa1
37: 66 f7 47 22 f0 ff testw $0xfff0,0x22(%rdi)
3d: 74 5a je 0x99
3f: 48 rex.W