rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=9af/1/0x4000000000000000 softirq=80539/80539 fqs=5250 
	(t=10502 jiffies g=132817 q=801)
NMI backtrace for cpu 0
CPU: 0 PID: 1236 Comm: aoe_tx0 Not tainted 5.16.0-next-20220111-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:111
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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:604 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
 rcu_pending kernel/rcu/tree.c:3919 [inline]
 rcu_sched_clock_irq.cold+0x5c/0x759 kernel/rcu/tree.c:2617
 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:1428
 __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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 kernel/kcov.c:199
Code: 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 a9 0f 8a 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 <65> 48 8b 14 25 00 70 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82
RSP: 0018:ffffc900058c7b20 EFLAGS: 00000246
RAX: 0000000000000201 RBX: ffff88807e386cc0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff84f31f23 RDI: 0000000000000003
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000046d18b00
R10: ffffffff84f31f15 R11: 0000000000000000 R12: ffff888077660280
R13: ffff88807666b000 R14: 0000000000000fff R15: 0000000000000020
 handle_tx+0x173/0x610 drivers/net/caif/caif_serial.c:229
 __netdev_start_xmit include/linux/netdevice.h:4682 [inline]
 netdev_start_xmit include/linux/netdevice.h:4696 [inline]
 xmit_one net/core/dev.c:3473 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3489
 __dev_queue_xmit+0x2985/0x3660 net/core/dev.c:4116
 tx+0x68/0xb0 drivers/block/aoe/aoenet.c:63
 kthread+0x1e7/0x3b0 drivers/block/aoe/aoecmd.c:1230
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
   6:	48 8b be b0 01 00 00 	mov    0x1b0(%rsi),%rdi
   d:	e8 b4 ff ff ff       	callq  0xffffffc6
  12:	31 c0                	xor    %eax,%eax
  14:	c3                   	retq
  15:	90                   	nop
  16:	65 8b 05 a9 0f 8a 7e 	mov    %gs:0x7e8a0fa9(%rip),%eax        # 0x7e8a0fc6
  1d:	89 c1                	mov    %eax,%ecx
  1f:	48 8b 34 24          	mov    (%rsp),%rsi
  23:	81 e1 00 01 00 00    	and    $0x100,%ecx
* 29:	65 48 8b 14 25 00 70 	mov    %gs:0x27000,%rdx <-- trapping instruction
  30:	02 00
  32:	a9 00 01 ff 00       	test   $0xff0100,%eax
  37:	74 0e                	je     0x47
  39:	85 c9                	test   %ecx,%ecx
  3b:	74 35                	je     0x72
  3d:	8b                   	.byte 0x8b
  3e:	82                   	.byte 0x82