rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=1d94/1/0x4000000000000000 softirq=292295/292296 fqs=4563
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1023085          0            0
rcu: 	cputime:    32404      20085           95   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=266301 q=2832 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 336 jiffies! g266301 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=145795
rcu: rcu_preempt kthread starved for 337 jiffies! g266301 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:26408 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11697 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker
RIP: 0010:queued_write_lock_slowpath+0x132/0x250
Code: 7f f6 f0 81 0b 00 01 00 00 43 0f b6 04 27 84 c0 74 35 89 d9 80 e1 07 80 c1 03 38 c1 7c 29 48 89 df e8 42 43 7f f6 eb 1f f3 90 <43> 0f b6 04 27 84 c0 74 14 89 d9 80 e1 07 80 c1 03 38 c1 7c 08 48
RSP: 0018:ffffc9000623f280 EFLAGS: 00000206
RAX: 00000000000001ff RBX: ffff8881af464840 RCX: ffffffff8bb0a57a
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff8881af464840
RBP: ffffc9000623f330 R08: ffff8881af464843 R09: 1ffff11035e8c908
R10: dffffc0000000000 R11: ffffed1035e8c909 R12: dffffc0000000000
R13: 1ffff92000c47e54 R14: ffffc9000623f2d0 R15: 1ffff11035e8c908
FS:  0000000000000000(0000) GS:ffff88818de63000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a453184028 CR3: 000000000e54c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 do_raw_write_lock+0x1ed/0x260
 __neigh_event_send+0x3b/0x1530
 neigh_resolve_output+0x198/0x750
 ip_finish_output2+0xca9/0x1070
 ip_output+0x29f/0x450
 iptunnel_xmit+0x59f/0xa00
 udp_tunnel_xmit_skb+0x2b8/0x410
 send4+0xa50/0xed0
 wg_socket_send_skb_to_peer+0xd1/0x1d0
 wg_packet_handshake_send_worker+0x203/0x350
 process_scheduled_works+0xb02/0x1830
 worker_thread+0xa50/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
CPU: 1 UID: 0 PID: 29666 Comm: syz.0.16194 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x70
Code: cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 48 32 56 11 65 8b 15 69 32 56 11 <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 94 16 00 00
RSP: 0018:ffffc90000a08218 EFLAGS: 00000286
RAX: ffffffff81cf8d6b RBX: 000000000000002c RCX: ffff888112161d40
RDX: 0000000000000105 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffffff81d15fa2 R09: ffffffff8e75e3e0
R10: dffffc0000000000 R11: fffff91fffc88405 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffc90000a082c0 R15: ffffc90000a082e0
FS:  00007ffa45ab56c0(0000) GS:ffff8882a9463000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffa45a72ff8 CR3: 00000001c21ec000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_trace_buf_alloc+0x11b/0x280
 perf_trace_lock+0x1a0/0x410
 lock_release+0x392/0x3d0
 rcu_read_unlock+0x93/0xa0
 trace_call_bpf+0xa12/0xb70
 perf_trace_run_bpf_submit+0x78/0x170
 perf_trace_lock+0x32d/0x410
 lock_release+0x392/0x3d0
 unwind_next_frame+0x1aaa/0x23c0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x187/0x630
 neigh_invalidate+0x3a2/0x460
 neigh_timer_handler+0xb99/0x11e0
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x30/0x90
Code: 04 24 65 48 8b 15 08 2e 56 11 65 8b 0d 29 2e 56 11 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 94 16 00 00 00 74 52 <8b> 8a 70 16 00 00 83 f9 03 75 47 48 8b 8a 78 16 00 00 44 8b 8a 74
RSP: 0018:ffffc9000632f878 EFLAGS: 00000246
RAX: ffffffff81d16091 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888112161d40 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000632f998 R08: ffffffff81d15fa2 R09: ffffffff8e75e3e0
R10: dffffc0000000000 R11: fffff91fffc88005 R12: ffff8881bb2e1980
R13: dffffc0000000000 R14: 1ffff92000c65f20 R15: ffffffff8e62a4e8
 trace_call_bpf+0x1b1/0xb70
 perf_trace_run_bpf_submit+0x78/0x170
 perf_trace_lock+0x32d/0x410
 lock_release+0x392/0x3d0
 _raw_spin_unlock+0x16/0x50
 fasync_insert_entry+0x1df/0x270
 fasync_helper+0x52/0xb0
 perf_fasync+0xc3/0x110
 do_vfs_ioctl+0x1117/0x1530
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffa44b9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffa45ab5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffa44e15fa0 RCX: 00007ffa44b9c799
RDX: 0000200000000840 RSI: 0000000000005452 RDI: 0000000000000005
RBP: 00007ffa44c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffa44e16038 R14: 00007ffa44e15fa0 R15: 00007ffdfa03bce8
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 105836164202 wd_nsec: 105836166641
