rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=f56c/1/0x4000000000000000 softirq=35490/35495 fqs=3363
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   678294          0            0
rcu: 	cputime:    18749      19203           83   ==> 37960(ms)
rcu: 	(t=10500 jiffies g=26621 q=2813 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 913 jiffies! g26621 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=13986
rcu: rcu_preempt kthread starved for 914 jiffies! g26621 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:26536 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 1233 Comm: kworker/u9:3 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #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+0x125/0x260
Code: 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 64 fc b1 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 89 df e8 43 fc
RSP: 0018:ffffc900076f7240 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff88810fde6840 RCX: ffffffff8b714f78
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88810fde6840
RBP: ffffc900076f72f0 R08: ffff88810fde6843 R09: 1ffff11021fbcd08
R10: dffffc0000000000 R11: ffffed1021fbcd09 R12: dffffc0000000000
R13: 1ffff92000edee4c R14: ffffc900076f7290 R15: 1ffff11021fbcd08
FS:  0000000000000000(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558a440bd028 CR3: 000000000df38000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000082 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 do_raw_write_lock+0x1f2/0x260
 __neigh_event_send+0x3b/0x1560
 neigh_resolve_output+0x198/0x750
 ip6_finish_output2+0x11fe/0x16a0
 udp_tunnel6_xmit_skb+0x5da/0xa60
 send6+0x5aa/0x8d0
 wg_socket_send_skb_to_peer+0x111/0x1d0
 wg_packet_handshake_send_worker+0x1db/0x320
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
CPU: 1 UID: 0 PID: 10355 Comm: syz.0.1318 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #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:unwind_get_return_address+0x56/0x90
Code: 83 c3 48 49 89 df 49 c1 ef 03 43 80 3c 37 00 74 08 48 89 df e8 fb a2 b0 00 48 8b 3b e8 93 a3 1a 00 85 c0 74 14 43 80 3c 37 00 <74> 08 48 89 df e8 e0 a2 b0 00 48 8b 03 eb 02 31 c0 5b 41 5e 41 5f
RSP: 0018:ffffc900001e05e8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffc900001e0650 RCX: d0db08600d77e100
RDX: 0000000000000001 RSI: ffffffff8d998940 RDI: ffffffff8223136e
RBP: ffffc900001e0690 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: ffff888107bb9cc0
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200003c0ca
FS:  00007fe3e10746c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3021fffc CR3: 0000000027290000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kfree+0x18e/0x440
 skb_release_data+0x62d/0x7c0
 sk_skb_reason_drop+0x127/0x170
 neigh_invalidate+0x3a2/0x460
 neigh_timer_handler+0x913/0x1030
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 8b 1d 21 f6 e8 c6 f0 57 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90002bdfc80 EFLAGS: 00000282
RAX: d0db08600d77e100 RBX: 0000000000000000 RCX: d0db08600d77e100
RDX: 0000000000000000 RSI: ffffffff8d998940 RDI: 0000000000000001
RBP: ffffc90002bdfd30 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200057bf90
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70
Code: 8b 3d 44 cb fb 0b 48 89 de 5b e9 33 5c 58 00 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 0c 25 08 10 a0 92 65 8b 15 28 e7 df 10 81 e2 00 01 ff 00
RSP: 0018:ffffc90002bdfdf8 EFLAGS: 00000246
RAX: ffffffff818d4a15 RBX: ffffc90002bdff00 RCX: 0000000000000002
RDX: ffff888107bb9cc0 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90002bdfec0 R08: ffffc90002bdfe47 R09: 1ffff9200057bfc8
R10: dffffc0000000000 R11: fffff5200057bfc9 R12: dffffc0000000000
R13: ffff888107bbb258 R14: ffff888107bba6d0 R15: ffff888107bba638
 task_work_run+0x175/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe3e018e9a9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe3e10740e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007fe3e03b5fa8 RCX: 00007fe3e018e9a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe3e03b5fa8
RBP: 00007fe3e03b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe3e03b5fac
R13: 0000000000000000 R14: 00007fffa67bde40 R15: 00007fffa67bdf28
 </TASK>
sched: DL replenish lagged too much
