watchdog: BUG: soft lockup - CPU#1 stuck for 111s! [kworker/u8:8:1265] Modules linked in: irq event stamp: 191921971 hardirqs last enabled at (191921970): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (191921970): [] _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:198 hardirqs last disabled at (191921971): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (10252598): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (10252598): [] batadv_tt_local_purge+0x2c1/0x340 net/batman-adv/translation-table.c:1366 softirqs last disabled at (10252599): [] do_softirq+0x76/0xd0 kernel/softirq.c:523 CPU: 1 UID: 0 PID: 1265 Comm: kworker/u8:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: bat_events batadv_tt_purge RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198 Code: f7 e8 3d a8 c5 f5 f7 c3 00 02 00 00 74 05 e8 c0 cf f1 f5 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 04 ce b6 f5 65 8b 05 0d 52 93 07 85 c0 74 18 5b 41 5e c3 cc cc RSP: 0018:ffffc90000a18e30 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000000000102 RDX: 0000000000000002 RSI: ffffffff8e253559 RDI: 0000000000000001 RBP: ffff8880362fb138 R08: ffffffff9058fb7f R09: 1ffffffff20b1f6f R10: dffffc0000000000 R11: fffffbfff20b1f70 R12: ffff8880b8728400 R13: ffffffff89d7ab60 R14: ffff8880b8728400 R15: 1ffff110170e50ea FS: 0000000000000000(0000) GS:ffff88812500c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f00289eec38 CR3: 000000000e948000 CR4: 00000000003526f0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:2062 [inline] __hrtimer_run_queues+0x2bf/0xa10 kernel/time/hrtimer.c:2123 hrtimer_run_softirq+0x17a/0x240 kernel/time/hrtimer.c:2140 handle_softirqs+0x225/0x840 kernel/softirq.c:622 do_softirq+0x76/0xd0 kernel/softirq.c:523 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_tt_local_purge+0x2c1/0x340 net/batman-adv/translation-table.c:1366 batadv_tt_purge+0x35/0xa10 net/batman-adv/translation-table.c:3565 process_one_work kernel/workqueue.c:3375 [inline] process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3539 kthread+0x388/0x470 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: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:363 [inline] RIP: 0010:smp_call_function_many_cond+0x112d/0x1500 kernel/smp.c:1002 Code: 78 44 8b 2b 44 89 ee 83 e6 01 31 ff e8 9c 45 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 47 41 0c 00 eb 35 f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 2d 41 0c 00 RSP: 0018:ffffc90000117720 EFLAGS: 00000293 RAX: ffffffff81bb43d3 RBX: ffff8880b8741a48 RCX: ffff88801ded0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000117870 R08: ffffffff9058fb7f R09: 1ffffffff20b1f6f R10: dffffc0000000000 R11: fffffbfff20b1f70 R12: 1ffff110170e8349 R13: dffffc0000000000 R14: 1ffff11003bda2b3 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888124f0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffa7413c70 CR3: 000000000e948000 CR4: 00000000003526f0 Call Trace: on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2602 [inline] smp_text_poke_batch_finish+0x5fd/0x1110 arch/x86/kernel/alternative.c:2812 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:3375 [inline] process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3539 kthread+0x388/0x470 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