rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=aaf/1/0x4000000000000000 softirq=141445/141446 fqs=5249 
	(t=10502 jiffies g=254161 q=201)
NMI backtrace for cpu 0
CPU: 0 PID: 20016 Comm: syz-executor.1 Not tainted 5.15.0-rc4-next-20211005-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:604 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
 rcu_pending kernel/rcu/tree.c:3889 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2608
 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:pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:590 [inline]
RIP: 0010:queued_spin_unlock arch/x86/include/asm/qspinlock.h:56 [inline]
RIP: 0010:do_raw_spin_unlock+0x167/0x230 kernel/locking/spinlock_debug.c:141
Code: 6c 7f 8b c7 45 08 ff ff ff ff 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 b7 00 00 00 48 83 3d 79 43 23 0a 00 <74> 4c 48 89 ef e8 af db ff ff 66 90 5d 41 5c 41 5d c3 48 c7 c6 00
RSP: 0018:ffffc90002fe7710 EFLAGS: 00000282
RAX: 1ffffffff16fed9c RBX: ffff888069351d00 RCX: ffffffff815c2850
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff88807c3d6088
RBP: ffff88807c3d6088 R08: 0000000000000000 R09: ffff88807c3d608b
R10: ffffed100f87ac11 R11: 0000000000000000 R12: ffff88807c3d6090
R13: ffff88807c3d6098 R14: ffff88807c3d6238 R15: ffffc90002fe7828
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:175 [inline]
 _raw_spin_unlock_bh+0x1a/0x30 kernel/locking/spinlock.c:210
 lock_sock include/net/sock.h:1637 [inline]
 mptcp_wait_data net/mptcp/protocol.c:1812 [inline]
 mptcp_recvmsg+0x1087/0x27b0 net/mptcp/protocol.c:2122
 inet6_recvmsg+0x11b/0x5e0 net/ipv6/af_inet6.c:659
 sock_recvmsg_nosec net/socket.c:944 [inline]
 sock_recvmsg net/socket.c:962 [inline]
 sock_recvmsg net/socket.c:958 [inline]
 ____sys_recvmsg+0x2c4/0x600 net/socket.c:2628
 ___sys_recvmsg+0x127/0x200 net/socket.c:2670
 do_recvmmsg+0x24d/0x6d0 net/socket.c:2764
 __sys_recvmmsg net/socket.c:2843 [inline]
 __do_sys_recvmmsg net/socket.c:2866 [inline]
 __se_sys_recvmmsg net/socket.c:2859 [inline]
 __x64_sys_recvmmsg+0x20b/0x260 net/socket.c:2859
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3de96878d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3de6bfe188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f3de978bf60 RCX: 00007f3de96878d9
RDX: 0000000000000001 RSI: 0000000020001280 RDI: 0000000000000003
RBP: 00007f3de96e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffee30739ff R14: 00007f3de6bfe300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	6c                   	insb   (%dx),%es:(%rdi)
   1:	7f 8b                	jg     0xffffff8e
   3:	c7 45 08 ff ff ff ff 	movl   $0xffffffff,0x8(%rbp)
   a:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  11:	fc ff df
  14:	48 c1 e8 03          	shr    $0x3,%rax
  18:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1)
  1c:	0f 85 b7 00 00 00    	jne    0xd9
  22:	48 83 3d 79 43 23 0a 	cmpq   $0x0,0xa234379(%rip)        # 0xa2343a3
  29:	00
* 2a:	74 4c                	je     0x78 <-- trapping instruction
  2c:	48 89 ef             	mov    %rbp,%rdi
  2f:	e8 af db ff ff       	callq  0xffffdbe3
  34:	66 90                	xchg   %ax,%ax
  36:	5d                   	pop    %rbp
  37:	41 5c                	pop    %r12
  39:	41 5d                	pop    %r13
  3b:	c3                   	retq
  3c:	48                   	rex.W
  3d:	c7                   	.byte 0xc7
  3e:	c6                   	.byte 0xc6