watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [kworker/1:0:25] Modules linked in: irq event stamp: 560511 hardirqs last enabled at (560510): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (560510): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (560511): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (560511): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (377978): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (377982): [] wg_socket_send_skb_to_peer+0x64/0x1a8 drivers/net/wireguard/socket.c:173 CPU: 1 UID: 0 PID: 25 Comm: kworker/1:0 Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: wg-crypt-wg0 wg_packet_tx_worker pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : preempt_count arch/arm64/include/asm/preempt.h:13 [inline] pc : check_kcov_mode kernel/kcov.c:182 [inline] pc : __sanitizer_cov_trace_pc+0x14/0x84 kernel/kcov.c:216 lr : fq_dequeue+0x5fc/0x1e20 net/sched/sch_fq.c:658 sp : ffff8000976a7010 x29: ffff8000976a7140 x28: ffff0000ee7503f8 x27: 0000000000000028 x26: dfff800000000000 x25: ffff0000ee750330 x24: 0000000000000000 x23: 1fffe0001dcea060 x22: ffff0000e3f79180 x21: ffff0000ee750340 x20: 0000000000000008 x19: ffff0000ee750304 x18: ffff8000976a6a20 x17: 000000000002709f x16: ffff800080569b84 x15: 0000000000000001 x14: ffff80008f570590 x13: dfff800000000000 x12: 0000000000000003 x11: ffff0000ee7503f0 x10: 0000000000ff0100 x9 : 0000000000000602 x8 : ffff0000c1b89e40 x7 : ffff80008045c23c x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000002 x1 : 0000000000000001 x0 : 0000000000000004 Call trace: preempt_count arch/arm64/include/asm/preempt.h:13 [inline] check_kcov_mode kernel/kcov.c:182 [inline] __sanitizer_cov_trace_pc+0x14/0x84 kernel/kcov.c:216 dequeue_skb net/sched/sch_generic.c:293 [inline] qdisc_restart net/sched/sch_generic.c:398 [inline] __qdisc_run+0x1e0/0x2374 net/sched/sch_generic.c:416 __dev_xmit_skb net/core/dev.c:3878 [inline] __dev_queue_xmit+0xd7c/0x3504 net/core/dev.c:4389 dev_queue_xmit include/linux/netdevice.h:3105 [inline] neigh_hh_output include/net/neighbour.h:526 [inline] neigh_output include/net/neighbour.h:540 [inline] ip6_finish_output2+0x1028/0x1fa0 net/ipv6/ip6_output.c:141 ip6_finish_output+0x428/0x7a8 net/ipv6/ip6_output.c:226 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x274/0x598 net/ipv6/ip6_output.c:247 dst_output include/net/dst.h:450 [inline] ip6_local_out+0x120/0x160 net/ipv6/output_core.c:155 ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline] udp_tunnel6_xmit_skb+0x474/0x980 net/ipv6/ip6_udp_tunnel.c:111 send6+0x578/0x940 drivers/net/wireguard/socket.c:152 wg_socket_send_skb_to_peer+0xfc/0x1a8 drivers/net/wireguard/socket.c:178 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline] wg_packet_tx_worker+0x1a8/0x718 drivers/net/wireguard/send.c:276 process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x978/0xec4 kernel/workqueue.c:3389 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6463 Comm: kworker/0:5 Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: wg-crypt-wg1 wg_packet_tx_worker pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x15c/0xd00 kernel/locking/qspinlock.c:380 lr : queued_spin_lock_slowpath+0x168/0xd00 kernel/locking/qspinlock.c:380 sp : ffff8000afba6fe0 x29: ffff8000afba7080 x28: 1fffe0001dcea01e x27: 1ffff00015f74e08 x26: dfff800000000000 x25: 1fffe0001da1b792 x24: ffff8000afba7000 x23: ffff8000afba7040 x22: ffff700015f74e00 x21: 0000000000000001 x20: 0000000000000001 x19: ffff0000ee7500f0 x18: ffff8000afba6ec0 x17: 0000000000032e6b x16: ffff800080a87234 x15: 0000000000000001 x14: 1fffe0001dcea01e x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001dcea01f x10: 1fffe0001dcea01e x9 : 0000000000000000 x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff80008b42f034 x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: __cmpwait_case_8 arch/arm64/include/asm/cmpxchg.h:229 [inline] __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] queued_spin_lock_slowpath+0x15c/0xd00 kernel/locking/qspinlock.c:380 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2ec/0x334 kernel/locking/spinlock_debug.c:116 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock+0x50/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __dev_xmit_skb net/core/dev.c:3845 [inline] __dev_queue_xmit+0xb54/0x3504 net/core/dev.c:4389 dev_queue_xmit include/linux/netdevice.h:3105 [inline] neigh_hh_output include/net/neighbour.h:526 [inline] neigh_output include/net/neighbour.h:540 [inline] ip_finish_output2+0xddc/0x13bc net/ipv4/ip_output.c:235 __ip_finish_output+0x1b0/0x45c ip_finish_output+0x44/0x2e8 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x1a8/0x21c net/ipv4/ip_output.c:433 dst_output include/net/dst.h:450 [inline] ip_local_out+0x120/0x160 net/ipv4/ip_output.c:129 iptunnel_xmit+0x428/0x940 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x1b4/0x2c8 net/ipv4/udp_tunnel_core.c:172 send4+0x758/0xcd4 drivers/net/wireguard/socket.c:85 wg_socket_send_skb_to_peer+0xc8/0x1a8 drivers/net/wireguard/socket.c:175 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline] wg_packet_tx_worker+0x1a8/0x718 drivers/net/wireguard/send.c:276 process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x978/0xec4 kernel/workqueue.c:3389 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860