rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=9ef/1/0x4000000000000000 softirq=287595/287598 fqs=5068 
	(t=10500 jiffies g=306081 q=1889)
NMI backtrace for cpu 0
CPU: 0 PID: 14945 Comm: vhost-14941 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>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:197
Code: ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 e9 ab 8a 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 40 70 02 00 a9 00 01 ff 00 74 0e
RSP: 0018:ffffc90005a07b20 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff86c68ccc RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000010 R09: ffffc90005a07b1f
R10: ffffffff86c68cbb R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000
 iotlb_access_ok+0x1bc/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
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ba 08 00 00 00       	mov    $0x8,%edx
   5:	4d 8b 03             	mov    (%r11),%r8
   8:	48 0f bd ca          	bsr    %rdx,%rcx
   c:	49 8b 45 00          	mov    0x0(%r13),%rax
  10:	48 63 c9             	movslq %ecx,%rcx
  13:	e9 64 ff ff ff       	jmpq   0xffffff7c
  18:	0f 1f 00             	nopl   (%rax)
  1b:	65 8b 05 e9 ab 8a 7e 	mov    %gs:0x7e8aabe9(%rip),%eax        # 0x7e8aac0b
  22:	89 c1                	mov    %eax,%ecx
  24:	48 8b 34 24          	mov    (%rsp),%rsi
* 28:	81 e1 00 01 00 00    	and    $0x100,%ecx <-- trapping instruction
  2e:	65 48 8b 14 25 40 70 	mov    %gs:0x27040,%rdx
  35:	02 00
  37:	a9 00 01 ff 00       	test   $0xff0100,%eax
  3c:	74 0e                	je     0x4c