rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=7a7/1/0x4000000000000000 softirq=17784/17785 fqs=5149 
	(t=10500 jiffies g=27229 q=2384)
NMI backtrace for cpu 1
CPU: 1 PID: 10693 Comm: vhost-10691 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:3880 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599
 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>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:vhost_iotlb_itree_subtree_search drivers/vhost/iotlb.c:19 [inline]
RIP: 0010:vhost_iotlb_itree_iter_first drivers/vhost/iotlb.c:19 [inline]
RIP: 0010:vhost_iotlb_itree_first+0x143/0x280 drivers/vhost/iotlb.c:169
Code: c1 e8 03 80 3c 28 00 0f 85 42 01 00 00 4d 8b 7e 50 48 89 df 4c 89 fe e8 eb 0e b1 fa 4c 39 fb 0f 86 cb 00 00 00 e8 0d 09 b1 fa <49> 8d 7c 24 28 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 e7 00 00 00
RSP: 0018:ffffc9000660faf0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88807e1c8000 RSI: ffffffff86c64793 RDI: ffff8880797b2490
RBP: dffffc0000000000 R08: 000000000000000f R09: ffffc9000660fb1f
R10: ffffffff86c64724 R11: 0000000000000000 R12: ffff8880797b2480
R13: 000000000000000f R14: 0000000000000000 R15: 0000000000000000
 iotlb_access_ok+0x1ce/0x3e0 drivers/vhost/vhost.c:1336
 vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366
 handle_rx+0x145/0x1b40 drivers/vhost/net.c:1140
 vhost_worker+0x23d/0x3d0 drivers/vhost/vhost.c:372
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
   0:	c1 e8 03             	shr    $0x3,%eax
   3:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
   7:	0f 85 42 01 00 00    	jne    0x14f
   d:	4d 8b 7e 50          	mov    0x50(%r14),%r15
  11:	48 89 df             	mov    %rbx,%rdi
  14:	4c 89 fe             	mov    %r15,%rsi
  17:	e8 eb 0e b1 fa       	callq  0xfab10f07
  1c:	4c 39 fb             	cmp    %r15,%rbx
  1f:	0f 86 cb 00 00 00    	jbe    0xf0
  25:	e8 0d 09 b1 fa       	callq  0xfab10937
* 2a:	49 8d 7c 24 28       	lea    0x28(%r12),%rdi <-- trapping instruction
  2f:	48 89 f8             	mov    %rdi,%rax
  32:	48 c1 e8 03          	shr    $0x3,%rax
  36:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  3a:	0f 85 e7 00 00 00    	jne    0x127