rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (8927 ticks this GP) idle=1a14/1/0x4000000000000000 softirq=26637/26637 fqs=3410
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   926283          0            0
rcu: 	cputime:    26149      26329           99   ==> 52490(ms)
rcu: 	(t=10501 jiffies g=21041 q=7272 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 3672 jiffies! g21041 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=15389
rcu: rcu_preempt kthread starved for 3674 jiffies! g21041 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: 7670 Comm: kworker/0:6 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-crypt-wg0 wg_packet_tx_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:ffffc9000951f340 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff88811b97d840 RCX: ffffffff8b714f78
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88811b97d840
RBP: ffffc9000951f3f0 R08: ffff88811b97d843 R09: 1ffff1102372fb08
R10: dffffc0000000000 R11: ffffed102372fb09 R12: dffffc0000000000
R13: 1ffff920012a3e6c R14: ffffc9000951f390 R15: 1ffff1102372fb08
FS:  0000000000000000(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa47ad926c0 CR3: 000000000df38000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
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_tx_worker+0x1c8/0x7c0
 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: 8945 Comm: syz.2.900 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:neigh_invalidate+0x31c/0x460
Code: 98 00 00 00 48 89 4c 24 10 48 c1 e9 03 48 89 4c 24 08 48 8b 44 24 08 0f b6 04 28 84 c0 0f 85 b7 00 00 00 48 8b 44 24 10 ff 08 <4c> 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 df ae c7 f8 49
RSP: 0018:ffffc900001e0ab0 EFLAGS: 00000206
RAX: ffff88811b97d898 RBX: ffff888107713080 RCX: ffff88801ef30000
RDX: 0000000000000100 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: dffffc0000000000 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: ffff88811b97d888
R13: ffff888107713088 R14: ffff88811b97d888 R15: ffff888107713080
FS:  00007eff0d8d36c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2d0ab7 CR3: 00000000380f6000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 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:ffffc90002eefa00 EFLAGS: 00000286
RAX: a440018f31437e00 RBX: 0000000000000000 RCX: a440018f31437e00
RDX: 0000000000000000 RSI: ffffffff8d998940 RDI: 0000000000000001
RBP: ffffc90002eefaa0 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920005ddf40
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kasan_byte_accessible+0x16/0x30
Code: 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df 0f b6 04 07 <3c> 08 0f 92 c0 e9 10 3d 4e 09 cc 66 66 66 66 66 66 2e 0f 1f 84 00
RSP: 0018:ffffc90002eefb60 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff82160162 RCX: a440018f31437e00
RDX: 0000000000000000 RSI: ffffffff82160162 RDI: 1ffffffff1c48d34
RBP: ffffffff821858e4 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff33ffcc5 R12: 0000000000000000
R13: ffffffff8e2469a0 R14: ffffffff8e2469a0 R15: 0000000000000001
 __kasan_check_byte+0x12/0x40
 lock_acquire+0x8d/0x360
 fs_reclaim_acquire+0x72/0x100
 kmem_cache_alloc_noprof+0x44/0x3c0
 sk_prot_alloc+0x57/0x220
 sk_alloc+0x3a/0x370
 unix_create1+0xb0/0x7c0
 unix_create+0x154/0x200
 __sock_create+0x4b3/0x9f0
 __sys_socketpair+0x1c5/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7eff0c98e9a9
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:00007eff0d8d3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007eff0cbb5fa0 RCX: 00007eff0c98e9a9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007eff0ca10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000240 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007eff0cbb5fa0 R15: 00007fff7e89ba18
 </TASK>
sched: DL replenish lagged too much
