rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=e91/1/0x4000000000000000 softirq=142568/142568 fqs=5240 
	(t=10502 jiffies g=253921 q=1532)
NMI backtrace for cpu 0
CPU: 0 PID: 1229 Comm: aoe_tx0 Not tainted 5.16.0-rc4-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: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: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:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
Code: 45 00 5d be 03 00 00 00 e9 d6 dd 63 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 19 8b 8b 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 40 70 02 00 a9
RSP: 0018:ffffc90004f2fb18 EFLAGS: 00000283
RAX: 0000000000000201 RBX: ffff888014dc8c80 RCX: 0000000000000000
RDX: ffff88801e34c180 RSI: ffffffff84e3606f RDI: 0000000000000003
RBP: dffffc0000000000 R08: 0000000000000000 R09: 000000001a750b00
R10: ffffffff84e362ec R11: 0000000000000000 R12: ffff88807983fc00
R13: ffff88806e4ce000 R14: 0000000000000020 R15: ffff888014dc8000
 handle_tx+0x121/0x610 drivers/net/caif/caif_serial.c:222
 __netdev_start_xmit include/linux/netdevice.h:4994 [inline]
 netdev_start_xmit include/linux/netdevice.h:5008 [inline]
 xmit_one net/core/dev.c:3590 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3606
 __dev_queue_xmit+0x299a/0x3650 net/core/dev.c:4229
 tx+0x68/0xb0 drivers/block/aoe/aoenet.c:63
 kthread+0x1e7/0x3b0 drivers/block/aoe/aoecmd.c:1230
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	45 00 5d be          	add    %r11b,-0x42(%r13)
   4:	03 00                	add    (%rax),%eax
   6:	00 00                	add    %al,(%rax)
   8:	e9 d6 dd 63 02       	jmpq   0x263dde3
   d:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
  13:	48 8b be b0 01 00 00 	mov    0x1b0(%rsi),%rdi
  1a:	e8 b4 ff ff ff       	callq  0xffffffd3
  1f:	31 c0                	xor    %eax,%eax
  21:	c3                   	retq
  22:	90                   	nop
  23:	65 8b 05 19 8b 8b 7e 	mov    %gs:0x7e8b8b19(%rip),%eax        # 0x7e8b8b43
* 2a:	89 c1                	mov    %eax,%ecx <-- trapping instruction
  2c:	48 8b 34 24          	mov    (%rsp),%rsi
  30:	81 e1 00 01 00 00    	and    $0x100,%ecx
  36:	65 48 8b 14 25 40 70 	mov    %gs:0x27040,%rdx
  3d:	02 00
  3f:	a9                   	.byte 0xa9