watchdog: BUG: soft lockup - CPU#1 stuck for 131s! [kworker/1:3:3221] Modules linked in: irq event stamp: 76667 hardirqs last enabled at (76666): [] __local_bh_enable_ip+0xd6/0x140 kernel/softirq.c:478 hardirqs last disabled at (76667): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (70494): [] spin_unlock_bh include/linux/spinlock.h:407 [inline] softirqs last enabled at (70494): [] ptr_ring_consume_bh include/linux/ptr_ring.h:399 [inline] softirqs last enabled at (70494): [] wg_packet_encrypt_worker+0x16e2/0x1760 drivers/net/wireguard/send.c:293 softirqs last disabled at (70501): [] __do_softirq kernel/softirq.c:703 [inline] softirqs last disabled at (70501): [] invoke_softirq kernel/softirq.c:542 [inline] softirqs last disabled at (70501): [] __irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786 CPU: 1 UID: 0 PID: 3221 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Workqueue: mm_percpu_wq vmstat_update RIP: 0010:in_softirq_really kernel/kcov.c:-1 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:179 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x32/0x80 kernel/kcov.c:213 Code: 65 48 8b 0d a8 1f d4 12 65 48 8b 15 a8 1f d4 12 f7 c2 00 01 00 ff 74 29 89 d6 81 e6 00 01 00 0f 81 fe 00 01 00 00 40 0f 95 c6 <81> fa 00 00 00 10 0f 93 c2 40 08 f2 75 35 83 b9 44 17 00 00 00 74 RSP: 0000:ffffc90000a080e8 EFLAGS: 00000246 RAX: ffffffff8207d901 RBX: 0000000000000001 RCX: ffff8880334c8000 RDX: 0000000000000104 RSI: 0000000000000100 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000100 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff91ffffb7a05 R12: 1ffff1100669929d R13: dffffc0000000000 R14: ffff8880334c94e9 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888123b4f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb08055da08 CR3: 000000002676e000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: get_recursion_context kernel/events/internal.h:218 [inline] perf_swevent_get_recursion_context+0xa1/0x100 kernel/events/core.c:11198 perf_trace_buf_alloc+0x43/0x280 kernel/trace/trace_event_perf.c:410 do_perf_trace_lock_acquire include/trace/events/lock.h:23 [inline] perf_trace_lock_acquire+0x1a6/0x440 include/trace/events/lock.h:23 __do_trace_lock_acquire include/trace/events/lock.h:23 [inline] trace_lock_acquire include/trace/events/lock.h:23 [inline] lock_acquire+0x303/0x350 kernel/locking/lockdep.c:5905 rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] trace_call_bpf+0xd5/0xb80 kernel/trace/bpf_trace.c:-1 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11512 do_perf_trace_lock_acquire include/trace/events/lock.h:23 [inline] perf_trace_lock_acquire+0x346/0x440 include/trace/events/lock.h:23 __do_trace_lock_acquire include/trace/events/lock.h:23 [inline] trace_lock_acquire include/trace/events/lock.h:23 [inline] lock_acquire+0x303/0x350 kernel/locking/lockdep.c:5905 rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] class_rcu_constructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:351 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:377 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4720 [inline] slab_alloc_node mm/slub.c:5033 [inline] kmem_cache_alloc_node_noprof+0x34f/0x600 mm/slub.c:5105 kmalloc_reserve net/core/skbuff.c:616 [inline] __alloc_skb+0x27a/0x7a0 net/core/skbuff.c:716 alloc_skb include/linux/skbuff.h:1390 [inline] ndisc_alloc_skb+0xa0/0x480 net/ipv6/ndisc.c:421 ndisc_send_rs+0x288/0x6b0 net/ipv6/ndisc.c:708 addrconf_rs_timer+0x2d2/0x6c0 net/ipv6/addrconf.c:4098 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386 run_timer_base kernel/time/timer.c:2395 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405 handle_softirqs+0x265/0x8d0 kernel/softirq.c:669 __do_softirq kernel/softirq.c:703 [inline] invoke_softirq kernel/softirq.c:542 [inline] __irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221 Code: f7 e8 cd 89 a7 f5 f7 c3 00 02 00 00 74 05 e8 a0 20 d4 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 54 83 98 f5 65 48 8b 05 dc f0 9f 08 48 85 c0 74 18 5b 41 5e c3 RSP: 0000:ffffc9000ea37898 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000216 RCX: 8000000000000002 RDX: 0000000000000006 RSI: ffffffff8e490162 RDI: 0000000000000001 RBP: 000000000000003f R08: ffffffff917c7cbf R09: 1ffffffff22f8f97 R10: dffffc0000000000 R11: fffffbfff22f8f98 R12: 00000000000001f4 R13: 000000000000003f R14: ffff88813fffc100 R15: 1ffff110170a83a8 decay_pcp_high+0x112/0x250 mm/page_alloc.c:2589 refresh_cpu_vm_stats+0x1e4/0x440 mm/vmstat.c:831 vmstat_update+0x15/0xb0 mm/vmstat.c:2062 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 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:csd_lock_wait kernel/smp.c:389 [inline] RIP: 0010:csd_lock kernel/smp.c:422 [inline] RIP: 0010:smp_call_function_many_cond+0x628/0x1500 kernel/smp.c:970 Code: 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 00 00 00 74 1d e8 42 6c 0c 00 RSP: 0018:ffffc90000127720 EFLAGS: 00000293 RAX: dffffc0000000000 RBX: ffff8880b8541b08 RCX: ffff88801f2eddc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000127870 R08: ffff88801f2ef35f R09: 1ffff11003e5de6b R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff110170a8361 R13: 0000000000000001 R14: ffff8880b8541b00 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888123a4f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f191afdc055 CR3: 000000000fb48000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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