ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 watchdog: BUG: soft lockup - CPU#0 stuck for 225s! [kworker/u8:15:6019] Modules linked in: irq event stamp: 1919556 hardirqs last enabled at (1919555): [] irqentry_exit+0x1dd/0x8c0 kernel/entry/common.c:219 hardirqs last disabled at (1919556): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (1919548): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1919548): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1919548): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 softirqs last disabled at (1919509): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1919509): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1919509): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 6019 Comm: kworker/u8:15 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xe02/0x15e0 kernel/smp.c:877 Code: 10 4c 89 74 24 10 49 89 d5 48 89 d5 48 89 54 24 18 49 c1 ed 03 83 e5 07 4d 01 e5 83 c5 03 e8 45 5c 0c 00 f3 90 41 0f b6 45 00 <40> 38 c5 7c 08 84 c0 0f 85 b6 05 00 00 8b 43 08 31 ff 83 e0 01 41 RSP: 0018:ffffc9000482f808 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b8540e00 RCX: ffffffff81b27aa1 RDX: ffff888033730000 RSI: ffffffff81b27a7b RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: ffff888033730b30 R12: dffffc0000000000 R13: ffffed10170a81c1 R14: 0000000000000001 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8881248f6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555660a4808 CR3: 000000000e184000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2711 [inline] smp_text_poke_batch_finish+0x27b/0xdb0 arch/x86/kernel/alternative.c:2921 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x376/0x550 kernel/jump_label.c:919 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate mm/kfence/core.c:874 [inline] toggle_allocation_gate+0xfa/0x280 mm/kfence/core.c:866 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 11950 Comm: syz.6.2033 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: a6 73 57 00 48 89 df 5b e9 8d 26 5d 00 be 03 00 00 00 5b e9 12 89 ec 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 34 24 65 48 8b 15 48 c9 f3 11 65 8b 05 59 c9 f3 RSP: 0018:ffffc90000a08e38 EFLAGS: 00000002 RAX: 0000000000010002 RBX: ffff8880b8528540 RCX: ffffffff81aac00b RDX: ffff88802fae9e80 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff9aea0d80 R12: ffff8880b8528440 R13: 188a859c26dc991e R14: ffff888076e30300 R15: 0000000000000001 FS: 00007f0e4bef86c0(0000) GS:ffff8881249f6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0e4bef7f98 CR3: 0000000055afb000 CR4: 0000000000350ef0 Call Trace: debug_hrtimer_deactivate kernel/time/hrtimer.c:443 [inline] debug_deactivate kernel/time/hrtimer.c:483 [inline] __run_hrtimer kernel/time/hrtimer.c:1745 [inline] __hrtimer_run_queues+0x460/0xc40 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3c0 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 16 6e 20 f6 48 89 df e8 ce c0 20 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 d5 c3 10 f6 65 8b 05 2e 29 39 08 85 c0 74 16 5b RSP: 0018:ffffc90003017c98 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff8880b8428440 RCX: 0000000000000007 RDX: 0000000000000000 RSI: ffffffff8dacc564 RDI: ffffffff8bf2b680 RBP: 0000000000000283 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff9088e9d7 R11: ffff88802faea9b0 R12: 0000000000000000 R13: 1bc16d0ec9c4b344 R14: dffffc0000000000 R15: ffff8880b8428440 clock_was_set+0x599/0x870 kernel/time/hrtimer.c:965 do_settimeofday64+0x364/0x550 kernel/time/timekeeping.c:1460 do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195 __do_sys_clock_settime kernel/time/posix-timers.c:1131 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1115 [inline] __x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1115 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0e4af8f749 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:00007f0e4bef8038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00007f0e4b1e5fa0 RCX: 00007f0e4af8f749 RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000 RBP: 00007f0e4b013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0e4b1e6038 R14: 00007f0e4b1e5fa0 R15: 00007ffcc7634ce8