watchdog: BUG: soft lockup - CPU#0 stuck for 121s! [kworker/0:10:10576] Modules linked in: irq event stamp: 879540 hardirqs last enabled at (879539): [] class_irqsave_destructor include/linux/irqflags.h:268 [inline] hardirqs last enabled at (879539): [] perf_swevent_event+0x71f/0x810 kernel/events/core.c:11087 hardirqs last disabled at (879540): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (878366): [] spin_unlock_bh include/linux/spinlock.h:407 [inline] softirqs last enabled at (878366): [] ptr_ring_consume_bh include/linux/ptr_ring.h:399 [inline] softirqs last enabled at (878366): [] wg_packet_handshake_receive_worker+0x100d/0x10b0 drivers/net/wireguard/receive.c:212 softirqs last disabled at (878362): [] spin_lock_bh include/linux/spinlock.h:353 [inline] softirqs last disabled at (878362): [] ptr_ring_consume_bh include/linux/ptr_ring.h:397 [inline] softirqs last disabled at (878362): [] wg_packet_handshake_receive_worker+0x8c6/0x10b0 drivers/net/wireguard/receive.c:212 CPU: 0 UID: 0 PID: 10576 Comm: kworker/0:10 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Workqueue: events_power_efficient gc_worker RIP: 0010:rcu_read_lock include/linux/rcupdate.h:850 [inline] RIP: 0010:gc_worker+0x2ac/0x1890 net/netfilter/nf_conntrack_core.c:1530 Code: 00 00 45 31 c0 45 31 c9 48 89 84 24 88 00 00 00 50 e8 68 75 91 f7 48 83 c4 08 e8 8f 9b e7 01 89 c3 31 ff 89 c6 e8 c4 6a b6 f7 <85> db 74 10 e8 8b cd 9a f7 84 c0 74 0e e8 b2 65 b6 f7 eb 56 e8 ab RSP: 0018:ffffc90005377980 EFLAGS: 00000293 RAX: ffffffff8a12906c RBX: 0000000000000001 RCX: ffff88802dc93e80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90005377ad0 R08: ffffffff8a129034 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff22f8ef8 R12: dffffc0000000000 R13: ffffffff81904eda R14: 0000000000040000 R15: 0000000000003ca0 FS: 0000000000000000(0000) GS:ffff888123a51000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fda73227dac CR3: 0000000035908000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: process_one_work kernel/workqueue.c:3495 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 24172 Comm: kworker/u8:26 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:native_apic_msr_write+0x3b/0x50 arch/x86/include/asm/apic.h:209 Code: 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 66 90 cc cc cc cc cc 89 f6 31 d2 e9 a6 5e b0 03 66 0f 1f 44 00 00 90 RSP: 0018:ffffc90000a08eb0 EFLAGS: 00000046 RAX: 00000000000980d1 RBX: ffff8880b8523f40 RCX: 0000000000000838 RDX: 0000000000000000 RSI: 00000000000980d1 RDI: 0000000000000838 RBP: ffffc90000a08f80 R08: 0000000001000001 R09: 0000000000000001 R10: 0000000000000003 R11: ffffffff8175b510 R12: 00000000000980d1 R13: dffffc0000000000 R14: 000000001000431b R15: 0000000000000020 FS: 0000000000000000(0000) GS:ffff888123b51000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2f010a CR3: 000000000fb48000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: apic_write arch/x86/include/asm/apic.h:405 [inline] lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:418 clockevents_program_event+0x385/0x630 kernel/time/clockevents.c:372 hrtimer_rearm kernel/time/hrtimer.c:2177 [inline] __hrtimer_rearm_deferred+0x36c/0x4b0 kernel/time/hrtimer.c:2197 hrtimer_rearm_deferred_tif include/linux/hrtimer_rearm.h:58 [inline] hrtimer_rearm_deferred include/linux/hrtimer_rearm.h:67 [inline] __irq_exit_rcu+0x14f/0x220 kernel/softirq.c:785 irq_exit_rcu+0x9/0x30 kernel/softirq.c:809 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:csd_lock_wait kernel/smp.c:389 [inline] RIP: 0010:csd_lock kernel/smp.c:422 [inline] RIP: 0010:smp_call_function_many_cond+0x61e/0x1500 kernel/smp.c:970 Code: b6 04 04 84 c0 0f 85 d5 03 00 00 44 8b 3b 44 89 fe 83 e6 01 31 ff e8 71 71 0c 00 41 83 e7 01 75 07 e8 66 6c 0c 00 eb 3f f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 04 04 84 c0 75 0f f7 03 01 RSP: 0018:ffffc900036ff720 EFLAGS: 00000293 RAX: ffffffff81bc89ee RBX: ffff8880b8443d68 RCX: ffff88804c725dc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900036ff870 R08: ffff88804c72735f R09: 1ffff110098e4e6b R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff110170887ad R13: 0000000000000000 R14: ffff8880b8443d60 R15: 0000000000000001 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2642 [inline] smp_text_poke_batch_finish+0x5f8/0x1110 arch/x86/kernel/alternative.c:2852 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:902 process_one_work kernel/workqueue.c:3495 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245