watchdog: BUG: soft lockup - CPU#1 stuck for 114s! [syz-executor.4:13809] Modules linked in: irq event stamp: 18487707 hardirqs last enabled at (18487706): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 hardirqs last disabled at (18487707): [] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1097 softirqs last enabled at (17085378): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (17085378): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 softirqs last disabled at (17085381): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (17085381): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 CPU: 1 PID: 13809 Comm: syz-executor.4 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200 Code: 48 89 ef 5d e9 01 1a 46 00 5d be 03 00 00 00 e9 66 13 63 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 e9 d7 8a 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc90000dc0c48 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88802db8cfd0 RCX: ffff8880770e3a00 RDX: 0000000000000000 RSI: ffff8880770e3a00 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000400 R09: 0000000000000000 R10: ffffffff875d3658 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888044240b00 R14: 0000000000000400 R15: ffff888044240b00 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558d657f6308 CR3: 00000000190fb000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pie_calculate_probability+0x674/0x7c0 net/sched/sch_pie.c:321 fq_pie_timer+0x170/0x2a0 net/sched/sch_fq_pie.c:383 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6668 Code: 55 53 65 48 8b 1c 25 40 70 02 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 22 7c 0a f8 e8 6d 5b 38 f8 fb bf 01 00 00 00 12 a9 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 50 6b 0a RSP: 0018:ffffc90018d8f028 EFLAGS: 00000206 RAX: 000000000104b3c3 RBX: ffff8880770e3a00 RCX: 1ffffffff1feed2e RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffed100ee1c740 R08: 0000000000000001 R09: ffffffff8ff71a0f R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit+0x31/0x80 kernel/entry/common.c:425 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:stack_trace_consume_entry+0x7a/0x160 kernel/stacktrace.c:89 Code: 0f 8e a5 00 00 00 31 c0 3b 6b 08 0f 83 81 00 00 00 48 8d 7b 0c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 90 00 00 00 8b RSP: 0018:ffffc90018d8f0f8 EFLAGS: 00000a03 RAX: dffffc0000000000 RBX: ffffc90018d8f1d0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81be30de RDI: ffffc90018d8f1dc RBP: 0000000000000000 R08: ffffffff8e1046ee R09: 0000000000000001 R10: fffff520031b1e2e R11: 000000000008808a R12: ffffc90018d8f1d0 R13: 0000000000000000 R14: ffff8880770e3a00 R15: ffff8880127833a0 arch_stack_walk+0x6d/0xe0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xff/0x130 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1749 slab_free mm/slub.c:3513 [inline] kmem_cache_free+0x92/0x5e0 mm/slub.c:3529 kernfs_put.part.0+0x2c4/0x540 fs/kernfs/dir.c:539 kernfs_put+0x42/0x50 fs/kernfs/dir.c:513 __kernfs_remove+0x725/0xab0 fs/kernfs/dir.c:1372 kernfs_remove_by_name_ns+0x4f/0xa0 fs/kernfs/dir.c:1544 kernfs_remove_by_name include/linux/kernfs.h:570 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:28 sysfs_remove_group+0x87/0x170 fs/sysfs/group.c:288 sysfs_remove_groups fs/sysfs/group.c:312 [inline] sysfs_remove_groups+0x5c/0xa0 fs/sysfs/group.c:304 device_remove_groups drivers/base/core.c:2480 [inline] device_remove_attrs+0xcb/0x170 drivers/base/core.c:2680 device_del+0x4fa/0xd60 drivers/base/core.c:3580 unregister_netdevice_many+0xd1f/0x1790 net/core/dev.c:11104 unregister_netdevice_queue+0x2dd/0x3c0 net/core/dev.c:11011 unregister_netdevice include/linux/netdevice.h:2989 [inline] __tun_detach+0x10ad/0x13d0 drivers/net/tun.c:670 tun_detach drivers/net/tun.c:687 [inline] tun_chr_close+0xc4/0x180 drivers/net/tun.c:3402 __fput+0x286/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xc14/0x2b40 kernel/exit.c:832 do_group_exit+0x125/0x310 kernel/exit.c:929 get_signal+0x47d/0x2220 kernel/signal.c:2830 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd6805a5ae9 Code: Unable to access opcode bytes at RIP 0x7fd6805a5abf. RSP: 002b:00007fd67db1b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000004 RBX: 00007fd6806b8f60 RCX: 00007fd6805a5ae9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007fd6805fff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd680becb2f R14: 00007fd67db1b300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: wg-crypt-wg1 wg_packet_tx_worker RIP: 0010:kvm_wait+0x98/0x100 arch/x86/kernel/kvm.c:1001 Code: fa 83 e2 07 38 d0 7f 04 84 c0 75 63 0f b6 07 40 38 c6 74 35 48 83 c4 10 c3 c3 e8 33 55 4a 00 eb 07 0f 00 2d ea 8f 75 08 fb f4 <48> 83 c4 10 c3 89 74 24 0c 48 89 3c 24 e8 f6 4f 4a 00 8b 74 24 0c RSP: 0018:ffffc90000ca7598 EFLAGS: 00000202 RAX: 0000000000141234 RBX: 0000000000000000 RCX: 1ffffffff1ff88ce RDX: 0000000000000000 RSI: 0000000000000802 RDI: 0000000000000000 RBP: ffff8880442408f0 R08: 0000000000000001 R09: ffffffff8ff71adf R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffffed100884811e R14: 0000000000000001 R15: ffff8880b9c3a880 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd728bbff8 CR3: 0000000018eb7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:603 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x8b8/0xb40 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [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+0x200/0x2b0 kernel/locking/spinlock_debug.c:115 spin_lock include/linux/spinlock.h:349 [inline] __dev_xmit_skb net/core/dev.c:3844 [inline] __dev_queue_xmit+0x1e63/0x3630 net/core/dev.c:4194 neigh_hh_output include/net/neighbour.h:511 [inline] neigh_output include/net/neighbour.h:525 [inline] ip_finish_output2+0x14cb/0x2160 net/ipv4/ip_output.c:221 __ip_finish_output net/ipv4/ip_output.c:299 [inline] __ip_finish_output+0x396/0x640 net/ipv4/ip_output.c:281 ip_finish_output+0x32/0x200 net/ipv4/ip_output.c:309 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x196/0x310 net/ipv4/ip_output.c:423 dst_output include/net/dst.h:450 [inline] ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:126 iptunnel_xmit+0x628/0xa50 net/ipv4/ip_tunnel_core.c:82 send4+0x421/0xe40 drivers/net/wireguard/socket.c:85 wg_socket_send_skb_to_peer+0x192/0x220 drivers/net/wireguard/socket.c:174 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline] wg_packet_tx_worker+0x1a7/0x720 drivers/net/wireguard/send.c:276 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: e9 01 1a 46 00 jmpq 0x461a0a 9: 5d pop %rbp a: be 03 00 00 00 mov $0x3,%esi f: e9 66 13 63 02 jmpq 0x263137a 14: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 1a: 48 8b be b0 01 00 00 mov 0x1b0(%rsi),%rdi 21: e8 b4 ff ff ff callq 0xffffffda 26: 31 c0 xor %eax,%eax 28: c3 retq 29: 90 nop * 2a: 65 8b 05 e9 d7 8a 7e mov %gs:0x7e8ad7e9(%rip),%eax # 0x7e8ad81a <-- trapping instruction 31: 89 c1 mov %eax,%ecx 33: 48 8b 34 24 mov (%rsp),%rsi 37: 81 e1 00 01 00 00 and $0x100,%ecx 3d: 65 gs 3e: 48 rex.W 3f: 8b .byte 0x8b