rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10596 ticks this GP) idle=4c7/1/0x4000000000000000 softirq=140360/140362 fqs=5138 
	(t=10500 jiffies g=229101 q=1318)
NMI backtrace for cpu 1
CPU: 1 PID: 31281 Comm: vhost-31280 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:__sanitizer_cov_trace_pc+0x42/0x60 kernel/kcov.c:202
Code: ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 a4 15 00 00 00 74 2c 8b 91 80 15 00 00 83 fa 02 75 21 48 8b 91 88 15 00 00 48 8b 32 <48> 8d 7e 01 8b 89 84 15 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89
RSP: 0018:ffffc90003aafaa8 EFLAGS: 00000246
RAX: ffffffff87a0a195 RBX: 0000000000000000 RCX: ffff888042321d00
RDX: ffffc900146d8000 RSI: 000000000003ffff RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff87a0a14a R09: fffff52000755f2d
R10: fffff52000755f2d R11: 0000000000000000 R12: ffff8880278a6e00
R13: 0000000000000000 R14: 0000000000000010 R15: 0000000000000001
 iotlb_access_ok+0x295/0x330 drivers/vhost/vhost.c:1349
 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:	ff 00                	incl   (%rax)
   2:	74 11                	je     0x15
   4:	f7 c2 00 01 00 00    	test   $0x100,%edx
   a:	74 35                	je     0x41
   c:	83 b9 a4 15 00 00 00 	cmpl   $0x0,0x15a4(%rcx)
  13:	74 2c                	je     0x41
  15:	8b 91 80 15 00 00    	mov    0x1580(%rcx),%edx
  1b:	83 fa 02             	cmp    $0x2,%edx
  1e:	75 21                	jne    0x41
  20:	48 8b 91 88 15 00 00 	mov    0x1588(%rcx),%rdx
  27:	48 8b 32             	mov    (%rdx),%rsi
* 2a:	48 8d 7e 01          	lea    0x1(%rsi),%rdi <-- trapping instruction
  2e:	8b 89 84 15 00 00    	mov    0x1584(%rcx),%ecx
  34:	48 39 cf             	cmp    %rcx,%rdi
  37:	73 08                	jae    0x41
  39:	48 89 44 f2 08       	mov    %rax,0x8(%rdx,%rsi,8)
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89