rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=d55/1/0x4000000000000000 softirq=82942/82942 fqs=4930 
	(t=10502 jiffies g=156517 q=4124)
NMI backtrace for cpu 0
CPU: 0 PID: 7408 Comm: syz-executor.3 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
 rcu_pending kernel/rcu/tree.c:3878 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:proc_keys_show+0xeb/0xd50 security/keys/proc.c:165
Code: c2 40 0f 9e c6 84 d2 0f 95 c0 40 84 c6 0f 85 70 0b 00 00 84 c9 0f 95 c2 0f 9e c0 84 c2 0f 85 60 0b 00 00 48 8b 83 f8 00 00 00 <48> 89 44 24 68 48 8b 83 00 01 00 00 48 89 44 24 70 48 8b 83 08 01
RSP: 0018:ffffc9000c0b7528 EFLAGS: 00000246
RAX: 2af05a01dd94df60 RBX: ffff8880119c0548 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff839ce401 RDI: ffff8880119c0640
RBP: ffff8880119c0540 R08: fffffffffffff000 R09: 0000000000000000
R10: ffffffff81d3b4f1 R11: 0000000000000000 R12: dffffc0000000000
R13: 00000000000003b7 R14: 0000000000000af8 R15: ffffffff89dd1860
 traverse.part.0+0xcf/0x5f0 fs/seq_file.c:111
 traverse fs/seq_file.c:101 [inline]
 seq_read_iter+0x8f9/0x1240 fs/seq_file.c:195
 proc_reg_read_iter+0x1fb/0x2d0 fs/proc/inode.c:300
 call_read_iter include/linux/fs.h:2156 [inline]
 io_iter_do_read fs/io_uring.c:3462 [inline]
 io_read+0x33c/0xff0 fs/io_uring.c:3519
 io_issue_sqe+0x800/0x7010 fs/io_uring.c:6628
 __io_queue_sqe fs/io_uring.c:6974 [inline]
 io_queue_sqe fs/io_uring.c:7016 [inline]
 io_submit_sqe fs/io_uring.c:7219 [inline]
 io_submit_sqes+0x1bca/0x8a20 fs/io_uring.c:7325
 __do_sys_io_uring_enter+0xf6e/0x1f50 fs/io_uring.c:10039
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f64aefa1ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f64ac4f6188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f64af0b5020 RCX: 00007f64aefa1ae9
RDX: 000000000000a875 RSI: 0000000000003fd3 RDI: 0000000000000003
RBP: 00007f64aeffbf6d R08: 0000000020000180 R09: 00000000ffffff54
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f64af5e8b2f R14: 00007f64ac4f6300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	40 0f 9e c6          	setle  %sil
   4:	84 d2                	test   %dl,%dl
   6:	0f 95 c0             	setne  %al
   9:	40 84 c6             	test   %al,%sil
   c:	0f 85 70 0b 00 00    	jne    0xb82
  12:	84 c9                	test   %cl,%cl
  14:	0f 95 c2             	setne  %dl
  17:	0f 9e c0             	setle  %al
  1a:	84 c2                	test   %al,%dl
  1c:	0f 85 60 0b 00 00    	jne    0xb82
  22:	48 8b 83 f8 00 00 00 	mov    0xf8(%rbx),%rax
* 29:	48 89 44 24 68       	mov    %rax,0x68(%rsp) <-- trapping instruction
  2e:	48 8b 83 00 01 00 00 	mov    0x100(%rbx),%rax
  35:	48 89 44 24 70       	mov    %rax,0x70(%rsp)
  3a:	48                   	rex.W
  3b:	8b                   	.byte 0x8b
  3c:	83 08 01             	orl    $0x1,(%rax)