rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=3bf/1/0x4000000000000000 softirq=130974/130974 fqs=5223 
	(t=10502 jiffies g=214113 q=2350)
NMI backtrace for cpu 1
CPU: 1 PID: 26703 Comm: vhost-26700 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>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196
Code: 00 00 0f 1f 40 00 be 0d 00 00 00 48 c7 c7 40 a4 95 8c e8 df 16 4b 00 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0c 25 c0 ef 01 00 65 8b 15 d4 f4 7d 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc9000336faa8 EFLAGS: 00000287
RAX: ffffffff879e3de5 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffff8880722f9d00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff879e3d9a R09: fffff5200066df2d
R10: fffff5200066df2d R11: 0000000000000000 R12: ffff88806fd16800
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
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	0f 1f 40 00          	nopl   0x0(%rax)
   6:	be 0d 00 00 00       	mov    $0xd,%esi
   b:	48 c7 c7 40 a4 95 8c 	mov    $0xffffffff8c95a440,%rdi
  12:	e8 df 16 4b 00       	callq  0x4b16f6
  17:	c3                   	retq
  18:	cc                   	int3
  19:	cc                   	int3
  1a:	cc                   	int3
  1b:	cc                   	int3
  1c:	cc                   	int3
  1d:	cc                   	int3
  1e:	cc                   	int3
  1f:	cc                   	int3
  20:	cc                   	int3
  21:	cc                   	int3
  22:	cc                   	int3
  23:	cc                   	int3
  24:	cc                   	int3
  25:	cc                   	int3
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	65 48 8b 0c 25 c0 ef 	mov    %gs:0x1efc0,%rcx <-- trapping instruction
  31:	01 00
  33:	65 8b 15 d4 f4 7d 7e 	mov    %gs:0x7e7df4d4(%rip),%edx        # 0x7e7df50e
  3a:	f7 c2 00 01 ff 00    	test   $0xff0100,%edx