rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=8fb/1/0x4000000000000000 softirq=23471/23472 fqs=5158 
	(t=10500 jiffies g=31949 q=2237)
NMI backtrace for cpu 0
CPU: 0 PID: 14745 Comm: vhost-14742 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+0x1dc/0x2d8 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x22d/0x390 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+0x1e33/0x2bc0 kernel/rcu/tree.c:2597
 update_process_times+0x197/0x200 kernel/time/timer.c:1785
 tick_sched_handle kernel/time/tick-sched.c:226 [inline]
 tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:iotlb_access_ok+0x160/0x330
Code: f6 e8 14 0d e2 f9 31 c0 41 83 fe 02 0f 94 c0 ff c0 89 44 24 1c 45 31 ed 4d 89 fe 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 <48> 8b 7c 24 48 4c 89 f6 48 8b 54 24 40 e8 ce c1 00 00 48 85 c0 0f
RSP: 0018:ffffc90002a5fab0 EFLAGS: 00000246
RAX: ffffffff87a244d4 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90016c2a000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: dffffc0000000000 R08: ffffffff87a2446a R09: fffff5200054bf2d
R10: fffff5200054bf2d R11: 0000000000000000 R12: ffff8880788dfe80
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
 vq_meta_prefetch+0x9f/0x1d0 drivers/vhost/vhost.c:1366
 handle_rx+0x236/0x1430 drivers/vhost/net.c:1140
 vhost_worker+0x215/0x340 drivers/vhost/vhost.c:372
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>
----------------
Code disassembly (best guess):
   0:	f6 e8                	imul   %al
   2:	14 0d                	adc    $0xd,%al
   4:	e2 f9                	loop   0xffffffff
   6:	31 c0                	xor    %eax,%eax
   8:	41 83 fe 02          	cmp    $0x2,%r14d
   c:	0f 94 c0             	sete   %al
   f:	ff c0                	inc    %eax
  11:	89 44 24 1c          	mov    %eax,0x1c(%rsp)
  15:	45 31 ed             	xor    %r13d,%r13d
  18:	4d 89 fe             	mov    %r15,%r14
  1b:	66 2e 0f 1f 84 00 00 	nopw   %cs:0x0(%rax,%rax,1)
  22:	00 00 00
  25:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
* 2a:	48 8b 7c 24 48       	mov    0x48(%rsp),%rdi <-- trapping instruction
  2f:	4c 89 f6             	mov    %r14,%rsi
  32:	48 8b 54 24 40       	mov    0x40(%rsp),%rdx
  37:	e8 ce c1 00 00       	callq  0xc20a
  3c:	48 85 c0             	test   %rax,%rax
  3f:	0f                   	.byte 0xf