watchdog: BUG: soft lockup - CPU#0 stuck for 226s! [kworker/u4:14:5965] Modules linked in: CPU: 0 PID: 5965 Comm: kworker/u4:14 Not tainted 5.15.119-syzkaller-android13-5.15.119_r00 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:kvm_wait+0x147/0x180 arch/x86/kernel/kvm.c:918 Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d ab ff f2 03 fb f4 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c RSP: 0018:ffffc90000f770c0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff920001eee1c RCX: 1ffffffff0d1a934 RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8881f7037e94 RBP: ffffc90000f77170 R08: dffffc0000000000 R09: ffffed103ee06fd3 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8881f7037e94 R14: 0000000000000001 R15: 1ffff920001eee20 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcfe29bfb8 CR3: 00000001277ff000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:597 [inline] pv_wait_node kernel/locking/qspinlock_paravirt.h:325 [inline] __pv_queued_spin_lock_slowpath+0x41b/0xc40 kernel/locking/qspinlock.c:473 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x139/0x1b0 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] __dev_xmit_skb net/core/dev.c:3855 [inline] __dev_queue_xmit+0xb7b/0x2e70 net/core/dev.c:4197 dev_queue_xmit+0x17/0x20 net/core/dev.c:4265 neigh_hh_output include/net/neighbour.h:501 [inline] neigh_output include/net/neighbour.h:515 [inline] ip_finish_output2+0xb9f/0xf60 net/ipv4/ip_output.c:228 __ip_finish_output+0x162/0x360 ip_finish_output+0x31/0x210 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:294 [inline] ip_output+0x1d6/0x420 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:444 [inline] ip_local_out+0x92/0xb0 net/ipv4/ip_output.c:126 iptunnel_xmit+0x4b7/0x8a0 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x1bd/0x2d0 net/ipv4/udp_tunnel_core.c:175 send4+0x79a/0xcd0 drivers/net/wireguard/socket.c:85 wg_socket_send_skb_to_peer+0xd5/0x1d0 drivers/net/wireguard/socket.c:175 wg_socket_send_buffer_to_peer+0x11a/0x170 drivers/net/wireguard/socket.c:200 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline] wg_packet_handshake_send_worker+0x1d4/0x240 drivers/net/wireguard/send.c:51 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2314 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2461 kthread+0x421/0x510 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 17191 Comm: syz-executor.4 Not tainted 5.15.119-syzkaller-android13-5.15.119_r00 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x5ba/0xc40 kernel/locking/qspinlock.c:508 Code: 00 00 49 89 dc c6 03 00 48 8b 44 24 10 0f b6 04 10 84 c0 0f 85 48 01 00 00 48 8b 44 24 08 c6 00 01 bb 00 80 ff ff eb 06 f3 90 c3 74 5e 41 0f b6 44 15 00 84 c0 75 36 41 80 3f 00 75 ea 4c 89 RSP: 0018:ffffc90000a06bc0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 00000000ffff98d9 RCX: ffffffff8154cacf RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffffff86f3506c RBP: ffffc90000a06cb0 R08: dffffc0000000000 R09: fffffbfff0de6a0e R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f7137e94 R13: 1ffffffff0de6a0d R14: 1ffff1103ee20001 R15: ffffffff86f3506c FS: 00007f717dbbf6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001400 CR3: 00000001277ff000 CR4: 00000000003506a0 DR0: 000000002a61a579 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000085 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:368 [inline] get_dist_table+0x207/0x2e0 net/sched/sch_netem.c:798 netem_change+0xa05/0x20c0 net/sched/sch_netem.c:988 netem_init+0x5b/0xb0 net/sched/sch_netem.c:1075 qdisc_create+0x890/0x12e0 net/sched/sch_api.c:1264 tc_modify_qdisc+0x8b4/0x14b0 rtnetlink_rcv_msg+0x951/0xc40 net/core/rtnetlink.c:5593 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2504 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5611 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1356 netlink_sendmsg+0xa0a/0xd20 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2412 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2466 __sys_sendmsg net/socket.c:2495 [inline] __do_sys_sendmsg net/socket.c:2504 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2502 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2502 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f717ee3cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f717dbbf0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f717ef5bf80 RCX: 00007f717ee3cb29 RDX: 0000000000000000 RSI: 0000000020001400 RDI: 0000000000000003 RBP: 00007f717ee8847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f717ef5bf80 R15: 00007ffc436bf778