kthread+0x346/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.3.20:388] Modules linked in: CPU: 1 PID: 388 Comm: syz.3.20 Not tainted 5.10.240-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline] RIP: 0010:smp_call_function_single+0x1f5/0x470 kernel/smp.c:517 Code: 48 44 89 f6 83 e6 01 31 ff e8 d7 6e 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 12 6b 0a 00 e9 a9 00 00 00 f3 90 44 24 48 01 00 00 00 0f 84 94 00 00 00 e8 f8 6a 0a 00 eb e9 e8 RSP: 0018:ffffc90000d57800 EFLAGS: 00000293 RAX: ffffffff81593578 RBX: 0000000000000000 RCX: ffff888112698000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000d578f0 R08: dffffc0000000000 R09: ffffed103ee0aec9 R10: ffffed103ee0aec9 R11: 1ffff1103ee0aec8 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff920001aaf04 FS: 000055558e643500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000010000 CR3: 000000012707b000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many_cond+0x8f2/0x9e0 kernel/smp.c:653 smp_call_function_many kernel/smp.c:716 [inline] smp_call_function kernel/smp.c:738 [inline] on_each_cpu+0xab/0x170 kernel/smp.c:837 text_poke_sync arch/x86/kernel/alternative.c:1568 [inline] text_poke_bp_batch+0x1c4/0x580 arch/x86/kernel/alternative.c:1768 text_poke_flush arch/x86/kernel/alternative.c:1959 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1966 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:126 __jump_label_update+0x37c/0x3a0 kernel/jump_label.c:459 jump_label_update+0x34c/0x3e0 kernel/jump_label.c:825 static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:207 static_key_disable+0x1a/0x30 kernel/jump_label.c:215 tracepoint_remove_func kernel/tracepoint.c:438 [inline] tracepoint_probe_unregister+0x6cb/0x950 kernel/tracepoint.c:572 bpf_probe_unregister+0x61/0x70 kernel/trace/bpf_trace.c:2135 bpf_raw_tp_link_release+0x63/0x90 kernel/bpf/syscall.c:2762 bpf_link_free kernel/bpf/syscall.c:2351 [inline] bpf_link_put+0x1f6/0x280 kernel/bpf/syscall.c:2377 bpf_link_release+0x3b/0x40 kernel/bpf/syscall.c:2385 __fput+0x2fb/0x770 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f9134289be9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffff155038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 0000000000032244 RCX: 00007f9134289be9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000001 R09: 00000006ff15532f R10: 0000001b32620000 R11: 0000000000000246 R12: 00007f91344c0fac R13: 00007f91344c0fa0 R14: ffffffffffffffff R15: 0000000000000003 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 331 Comm: kworker/0:2 Not tainted 5.10.240-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 Workqueue: wg-crypt-wg2 wg_packet_decrypt_worker RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:66 [inline] RIP: 0010:halt arch/x86/include/asm/irqflags.h:112 [inline] RIP: 0010:kvm_wait+0xb2/0x120 arch/x86/kernel/kvm.c:921 Code: c1 e8 03 42 0f b6 04 30 84 c0 75 6d 0f b6 07 40 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d ff 98 98 03 f4 0e 0f 1f 44 00 00 0f 00 2d f0 98 98 03 fb f4 4c 89 64 24 18 ff RSP: 0018:ffffc90000007320 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff8881f7047840 RCX: ffffffff814b22ca RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881f7047840 RBP: ffffc900000073d0 R08: dffffc0000000000 R09: ffffed103ee08f09 R10: ffffed103ee08f09 R11: 1ffff1103ee08f08 R12: 0000000000000046 R13: 1ffff1103ee08f08 R14: dffffc0000000000 R15: 1ffff92000000e68 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000012a3fd000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:564 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x714/0xb70 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock_flags include/linux/spinlock.h:195 [inline] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irqsave+0x108/0x110 kernel/locking/spinlock.c:159 lock_timer_base+0x127/0x270 kernel/time/timer.c:952 __mod_timer+0x10a/0xb30 kernel/time/timer.c:1025 add_timer+0x68/0x80 kernel/time/timer.c:1165 __queue_delayed_work+0x173/0x200 kernel/workqueue.c:1683 queue_delayed_work_on+0xde/0x130 kernel/workqueue.c:1708 queue_delayed_work include/linux/workqueue.h:530 [inline] schedule_delayed_work include/linux/workqueue.h:634 [inline] kvfree_call_rcu+0x417/0x620 kernel/rcu/tree.c:3568 trie_delete_elem+0x57a/0x710 kernel/bpf/lpm_trie.c:-1 bpf_prog_2c29ac5cdc6b1842+0x3a/0xc68 bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2061 [inline] bpf_trace_run3+0xcb/0x230 kernel/trace/bpf_trace.c:2099 __bpf_trace_timer_start+0x2b/0x40 include/trace/events/timer.h:52 trace_timer_start include/trace/events/timer.h:52 [inline] enqueue_timer+0x337/0x480 kernel/time/timer.c:592 __mod_timer+0x79f/0xb30 kernel/time/timer.c:-1 mod_timer+0x1f/0x30 kernel/time/timer.c:1119 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline] wg_timers_data_received+0x1ae/0x200 drivers/net/wireguard/timers.c:158 wg_packet_consume_data_done drivers/net/wireguard/receive.c:372 [inline] wg_packet_rx_poll+0xb3e/0x1a10 drivers/net/wireguard/receive.c:481 napi_poll net/core/dev.c:6874 [inline] net_rx_action+0x432/0xdd0 net/core/dev.c:6944 __do_softirq+0x255/0x563 kernel/softirq.c:309 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 do_softirq+0x9e/0xe0 kernel/softirq.c:358 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:194 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x51/0x60 kernel/locking/spinlock.c:207 spin_unlock_bh include/linux/spinlock.h:399 [inline] ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline] wg_packet_decrypt_worker+0xcc1/0xd60 drivers/net/wireguard/receive.c:506 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447 kthread+0x346/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298