rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=7cd/1/0x4000000000000000 softirq=113436/113436 fqs=5114 
	(t=10500 jiffies g=213905 q=1684)
NMI backtrace for cpu 0
CPU: 0 PID: 9311 Comm: vhost-9307 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>
 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+0x187/0x280 drivers/vhost/iotlb.c:169
Code: 28 4c 89 ef 4c 89 f6 e8 87 f4 b1 fa 4d 39 f5 0f 82 81 00 00 00 e8 a9 ee b1 fa 49 8d 7c 24 30 48 89 f8 48 c1 e8 03 80 3c 28 00 <0f> 85 a9 00 00 00 4d 8b 74 24 30 48 89 df 4c 89 f6 e8 53 f4 b1 fa
RSP: 0018:ffffc90012867af0 EFLAGS: 00000246
RAX: 1ffff1100e5fa9d6 RBX: 0000000000000000 RCX: ffffc9000b211000
RDX: 0000000000040000 RSI: ffffffff86c578c7 RDI: ffff888072fd4eb0
RBP: dffffc0000000000 R08: 000000000000000f R09: ffffc90012867b1f
R10: ffffffff86c578b9 R11: 0000000000000000 R12: ffff888072fd4e80
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:	28 4c 89 ef          	sub    %cl,-0x11(%rcx,%rcx,4)
   4:	4c 89 f6             	mov    %r14,%rsi
   7:	e8 87 f4 b1 fa       	callq  0xfab1f493
   c:	4d 39 f5             	cmp    %r14,%r13
   f:	0f 82 81 00 00 00    	jb     0x96
  15:	e8 a9 ee b1 fa       	callq  0xfab1eec3
  1a:	49 8d 7c 24 30       	lea    0x30(%r12),%rdi
  1f:	48 89 f8             	mov    %rdi,%rax
  22:	48 c1 e8 03          	shr    $0x3,%rax
  26:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
* 2a:	0f 85 a9 00 00 00    	jne    0xd9 <-- trapping instruction
  30:	4d 8b 74 24 30       	mov    0x30(%r12),%r14
  35:	48 89 df             	mov    %rbx,%rdi
  38:	4c 89 f6             	mov    %r14,%rsi
  3b:	e8 53 f4 b1 fa       	callq  0xfab1f493