rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-....: (1 GPs behind) idle=565/1/0x4000000000000000 softirq=8037/8038 fqs=5250
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7/1:b..l
(detected by 1, t=10502 jiffies, g=8653, q=527)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13 Comm: kworker/0:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: wg-crypt-wg1 wg_packet_tx_worker
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x0/0x80 kernel/kcov.c:301
Code: 28 4d 39 ca 77 22 89 ff 89 f6 4a c7 44 02 08 05 00 00 00 4a 89 7c 02 10 4a 89 74 02 18 4a 89 44 02 20 48 ff c1 48 89 0a c3 90 <48> 8b 04 24 65 48 8b 0d 34 79 89 7e 65 8b 15 35 79 89 7e 81 e2 00
RSP: 0018:ffffc90000d27078 EFLAGS: 00000046
RAX: ffffffff8197ba84 RBX: ffffc90000d27220 RCX: ffff88813fe20000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000d27170 R08: ffffc90000d271f7 R09: ffffc90000d271c0
R10: dffffc0000000000 R11: fffff520001a4e3f R12: dffffc0000000000
R13: ffffc90000d27226 R14: 0000000000020100 R15: ffffc90000d27380
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75502b7ff8 CR3: 0000000056575000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
perf_prepare_sample+0x8dd/0x1cb0 kernel/events/core.c:7680
__perf_event_output kernel/events/core.c:7802 [inline]
perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7822
__perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515
perf_tp_event+0x324/0xbe0 kernel/events/core.c:10047
perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 c2 22 9d 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000d277c0 EFLAGS: 00000206
RAX: 852fa6a9eb002400 RBX: 1ffff920001a4efc RCX: 852fa6a9eb002400
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: ffffc90000d27888 R08: ffffffff901cb1bf R09: 1ffffffff2039637
R10: dffffc0000000000 R11: fffffbfff2039638 R12: ffffffff8c323400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
rcu_read_unlock include/linux/rcupdate.h:772 [inline]
ip_output+0x342/0x3e0 net/ipv4/ip_output.c:438
iptunnel_xmit+0x4a1/0x8b0 net/ipv4/ip_tunnel_core.c:82
udp_tunnel_xmit_skb+0x1ae/0x280 net/ipv4/udp_tunnel_core.c:175
send4+0x948/0xd70 drivers/net/wireguard/socket.c:85
wg_socket_send_skb_to_peer+0xcd/0x1c0 drivers/net/wireguard/socket.c:175
wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
wg_packet_tx_worker+0x1d3/0x7b0 drivers/net/wireguard/send.c:276
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
task:kworker/0:0 state:R running task stack:25408 pid: 7 ppid: 2 flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
irqentry_exit+0x63/0x70 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:seqcount_lockdep_reader_access+0x196/0x1d0 include/linux/seqlock.h:106
Code: f9 4d 85 e4 75 16 e8 69 13 57 f9 eb 15 e8 62 13 57 f9 e8 3d f7 97 01 4d 85 e4 74 ea e8 53 13 57 f9 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 43 c7 44 3e 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc90000cc7a20 EFLAGS: 00000293
RAX: ffffffff8821df4d RBX: 0000000000000000 RCX: ffff888016e8bb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000cc7ad0 R08: ffffffff901cb15f R09: 1ffffffff203962b
R10: dffffc0000000000 R11: fffffbfff203962c R12: 0000000000000200
R13: ffff888022f7ca80 R14: 1ffff92000198f44 R15: dffffc0000000000
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:338 [inline]
gc_worker+0x2e5/0x13d0 net/netfilter/nf_conntrack_core.c:1472
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287