INFO: task syz-executor.5:32136 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.5  state:D stack:28592 pid:32136 ppid:  6503 flags:0x00024004
Call Trace:
 <TASK>
 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+0x263/0x2a20 kernel/exit.c:781
 do_group_exit+0x125/0x310 kernel/exit.c:923
 get_signal+0x47d/0x21d0 kernel/signal.c:2855
 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: 0033:0x7fcf2d11cae9
RSP: 002b:00007fcf2a650218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fcf2d2300e8 RCX: 00007fcf2d11cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcf2d2300e8
RBP: 00007fcf2d2300e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcf2d2300ec
R13: 00007ffed0f4347f R14: 00007fcf2a650300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8b982da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446

=============================================

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:
 <TASK>
 __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
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2527 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:__prepare_ICR arch/x86/kernel/apic/local.h:40 [inline]
RIP: 0010:__default_send_IPI_dest_field+0x68/0x130 arch/x86/kernel/apic/ipi.c:167
Code: 90 0f b6 45 00 84 c0 74 08 3c 03 0f 8e 99 00 00 00 8b 04 25 00 c3 5f ff f6 c4 10 75 e2 44 89 e7 c1 e7 18 89 3c 25 10 c3 5f ff <89> f0 09 d8 80 cf 04 83 fe 02 0f 44 c3 89 04 25 00 c3 5f ff 48 83
RSP: 0018:ffffc9000ad7f9b0 EFLAGS: 00000016
RAX: 00000000000008fb RBX: 0000000000000800 RCX: 0000000000000000
RDX: 0000000000000800 RSI: 00000000000000fb RDI: 0000000001000000
RBP: fffffbffffebf860 R08: 0000000000000000 R09: ffff8880b9d3ab97
R10: ffffffff817da85d R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fee35bd9030 CR3: 000000000b68e000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 _flat_send_IPI_mask+0x4e/0x60 arch/x86/kernel/apic/apic_flat_64.c:56
 smp_call_function_many_cond+0xa33/0xc20 kernel/smp.c:949
 on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1112 [inline]
 text_poke_bp_batch+0x47d/0x560 arch/x86/kernel/alternative.c:1366
 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:626 [inline]
 toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:618
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	0f b6 45 00          	movzbl 0x0(%rbp),%eax
   5:	84 c0                	test   %al,%al
   7:	74 08                	je     0x11
   9:	3c 03                	cmp    $0x3,%al
   b:	0f 8e 99 00 00 00    	jle    0xaa
  11:	8b 04 25 00 c3 5f ff 	mov    0xffffffffff5fc300,%eax
  18:	f6 c4 10             	test   $0x10,%ah
  1b:	75 e2                	jne    0xffffffff
  1d:	44 89 e7             	mov    %r12d,%edi
  20:	c1 e7 18             	shl    $0x18,%edi
  23:	89 3c 25 10 c3 5f ff 	mov    %edi,0xffffffffff5fc310
* 2a:	89 f0                	mov    %esi,%eax <-- trapping instruction
  2c:	09 d8                	or     %ebx,%eax
  2e:	80 cf 04             	or     $0x4,%bh
  31:	83 fe 02             	cmp    $0x2,%esi
  34:	0f 44 c3             	cmove  %ebx,%eax
  37:	89 04 25 00 c3 5f ff 	mov    %eax,0xffffffffff5fc300
  3e:	48                   	rex.W
  3f:	83                   	.byte 0x83