watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [kworker/1:5:4126]
Modules linked in:
irq event stamp: 22617
hardirqs last  enabled at (22616): [<ffff8000111a3bac>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (22616): [<ffff8000111a3bac>] exit_to_kernel_mode+0xe0/0x168 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (22617): [<ffff8000111a3e04>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (18108): [<ffff80000c41c188>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (18112): [<ffff80000c426c7c>] wg_socket_send_skb_to_peer+0x60/0x1a4 drivers/net/wireguard/socket.c:173
CPU: 1 PID: 4126 Comm: kworker/1:5 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: wg-crypt-wg2 wg_packet_tx_worker
pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __sanitizer_cov_trace_pc+0x2c/0xac kernel/kcov.c:202
lr : fq_flow_add_tail net/sched/sch_fq.c:165 [inline]
lr : fq_dequeue+0x758/0x1978 net/sched/sch_fq.c:564
sp : ffff80001f597150
x29: ffff80001f5972a0 x28: ffff0000c1f6a2e8 x27: 1fffe00018268e39
x26: ffff0000c1f6a000 x25: ffff0000c1347180 x24: 00000000ecce7994
x23: ffff0000c13471c8 x22: ffff0000c1f6a2d0 x21: 0000000000000008
x20: 0000000000000010 x19: dfff800000000000 x18: 0000000000000802
x17: 0000000000000000 x16: ffff8000082bf2b8 x15: 0000000000000001
x14: 0000000000ff0100 x13: 1ffff0000282a06b x12: 0000000000ff0100
x11: 0000000000000802 x10: 0000000000000000 x9 : ffff000000000000
x8 : ffff0000d1b81b40 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff800008044e7c
x2 : 0000000000000002 x1 : 00000000ecce7994 x0 : 0000000000000001
Call trace:
 preempt_count arch/arm64/include/asm/preempt.h:12 [inline]
 check_kcov_mode kernel/kcov.c:172 [inline]
 __sanitizer_cov_trace_pc+0x2c/0xac kernel/kcov.c:206
 dequeue_skb net/sched/sch_generic.c:292 [inline]
 qdisc_restart net/sched/sch_generic.c:397 [inline]
 __qdisc_run+0x1bc/0x1170 net/sched/sch_generic.c:415
 __dev_xmit_skb net/core/dev.c:3942 [inline]
 __dev_queue_xmit+0xfe0/0x2800 net/core/dev.c:4253
 dev_queue_xmit+0x24/0x34 net/core/dev.c:4321
 neigh_hh_output include/net/neighbour.h:493 [inline]
 neigh_output include/net/neighbour.h:507 [inline]
 ip6_finish_output2+0x129c/0x1a14 net/ipv6/ip6_output.c:130
 __ip6_finish_output+0x570/0x6dc net/ipv6/ip6_output.c:201
 ip6_finish_output+0x40/0x218 net/ipv6/ip6_output.c:211
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip6_output+0x274/0x500 net/ipv6/ip6_output.c:234
 dst_output include/net/dst.h:452 [inline]
 ip6_local_out+0x120/0x15c net/ipv6/output_core.c:161
 ip6tunnel_xmit include/net/ip6_tunnel.h:160 [inline]
 udp_tunnel6_xmit_skb+0x40c/0x8e8 net/ipv6/ip6_udp_tunnel.c:109
 send6+0x4e4/0x770 drivers/net/wireguard/socket.c:152
 wg_socket_send_skb_to_peer+0xf8/0x1a4 drivers/net/wireguard/socket.c:178
 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
 wg_packet_tx_worker+0x19c/0x6c4 drivers/net/wireguard/send.c:276
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870