rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=2d4c/1/0x4000000000000000 softirq=28090/28091 fqs=1
rcu: 	(t=10501 jiffies g=21745 q=512 ncpus=2)
rcu: rcu_preempt kthread starved for 10499 jiffies! g21745 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:R  running task     stack:27432 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9370 Comm: syz.1.981 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:native_queued_spin_lock_slowpath+0xb5/0x960
Code: 0c 04 04 c7 44 24 60 00 00 00 00 0f 1f 44 00 00 4c 8d 74 24 60 49 89 df 49 c1 ef 03 41 bd 01 00 00 00 eb 06 89 44 24 60 f3 90 <48> 89 df be 04 00 00 00 e8 4e 50 7f f6 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc90003ac7820 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8881772d27c8 RCX: ffffffff8bb09b72
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8881772d27c8
RBP: ffffc90003ac7910 R08: ffff8881772d27cb R09: 1ffff1102ee5a4f9
R10: dffffc0000000000 R11: ffffed102ee5a4fa R12: 1ffff92000758f0c
R13: 0000000000000001 R14: ffffc90003ac7880 R15: 1ffff1102ee5a4f9
FS:  0000555558b51500(0000) GS:ffff8882a9463000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003b00 CR3: 00000001be648000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 do_raw_spin_lock+0x26c/0x2f0
 futex_unqueue+0xf6/0x240
 __futex_wait+0x24e/0x420
 futex_wait+0x119/0x380
 do_futex+0x333/0x420
 __se_sys_futex+0x3a8/0x450
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbbb879c799
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:00007ffe03bbbd78 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000027fed RCX: 00007fbbb879c799
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbbb8a1609c
RBP: 0000000000000032 R08: 3fffffffffffffff R09: 0000000000000000
R10: 00007ffe03bbbe80 R11: 0000000000000246 R12: 00007ffe03bbbea0
R13: 00007fbbb8a1609c R14: 000000000002801f R15: 00007ffe03bbbe80
 </TASK>
CPU: 0 UID: 0 PID: 9372 Comm: syz.1.981 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:queue_work_on+0x162/0x1d0
Code: 00 4d 85 ed 75 16 e8 2d 4a 38 00 eb 15 e8 26 4a 38 00 e8 01 9f 20 0a 4d 85 ed 74 ea e8 17 4a 38 00 fb 65 48 8b 05 7e 7c 8e 11 <48> 3b 44 24 18 75 56 89 d8 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc900000072d0 EFLAGS: 00000246
RAX: 32a9218558a97100 RBX: ffff8881bde69701 RCX: ffff88810f1a57c0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000008 R08: ffffffff90118bb7 R09: 1ffffffff2023176
R10: dffffc0000000000 R11: fffffbfff2023177 R12: 0000000000000000
R13: 0000000000000200 R14: 0000000000000000 R15: 0000000002800001
FS:  00007fbbb96826c0(0000) GS:ffff88818de63000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c382eda CR3: 00000001be648000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 wg_packet_send_queued_handshake_initiation+0x21f/0x340
 wg_packet_send_staged_packets+0x1104/0x13b0
 wg_xmit+0xa12/0xf70
 dev_hard_start_xmit+0x2d8/0x870
 __dev_queue_xmit+0x16d1/0x3890
 ip6_output+0x340/0x550
 ndisc_send_skb+0xd0b/0x1670
 addrconf_rs_timer+0x395/0x6d0
 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:its_return_thunk+0x0/0x10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 2b 7a 82 f5 cc
RSP: 0018:ffffc900038e7a90 EFLAGS: 00000287
RAX: ffffffff8ba8a672 RBX: ffffc90003ac7aa8 RCX: 0000000000080000
RDX: ffffc9002196a000 RSI: 00000000000004ce RDI: 00000000000004cf
RBP: 1ffff92000758f56 R08: ffff888169a69d6b R09: 1ffff1102d34d3ad
R10: dffffc0000000000 R11: ffffed102d34d3ae R12: dffffc0000000000
R13: ffffc90003ac7ad0 R14: ffffc90003ac7aa8 R15: ffffc90003ac7ab0
 plist_check_list+0x2e2/0x310
 plist_del+0x5b/0x3f0
 __futex_unqueue+0xf0/0x160
 futex_wake_mark+0xe2/0x1f0
 futex_wake+0x39b/0x580
 do_futex+0x395/0x420
 __se_sys_futex+0x3a8/0x450
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbbb879c799
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:00007fbbb96820e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fbbb8a16098 RCX: 00007fbbb879c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fbbb8a1609c
RBP: 00007fbbb8a16090 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbbb8a16128 R14: 00007ffe03bbbb30 R15: 00007ffe03bbbc18
 </TASK>
sched: DL replenish lagged too much
