ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 watchdog: BUG: soft lockup - CPU#0 stuck for 245s! [kworker/u8:0:12] Modules linked in: irq event stamp: 4711194 hardirqs last enabled at (4711193): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:310 hardirqs last disabled at (4711194): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (4711184): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (4711184): [] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:607 softirqs last disabled at (4711093): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (4711093): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (4711093): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.16.0-rc3-syzkaller-00044-g7595b66ae9de #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xd7b/0x1510 kernel/smp.c:885 Code: e8 ba 17 0c 00 45 85 ed 74 46 48 8b 14 24 49 89 d6 49 89 d5 49 c1 ee 03 41 83 e5 07 4d 01 e6 41 83 c5 03 e8 57 1c 0c 00 f3 90 <41> 0f b6 06 41 38 c5 7c 08 84 c0 0f 85 6f 05 00 00 8b 43 08 31 ff RSP: 0018:ffffc900001178a0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b853ff60 RCX: ffffffff81b000bd RDX: ffff88801e285a00 RSI: ffffffff81b00099 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000 R13: 0000000000000003 R14: ffffed10170a7fed R15: ffff8880b843b6c0 FS: 0000000000000000(0000) GS:ffff888124759000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe009ce56c0 CR3: 000000000e382000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2691 [inline] smp_text_poke_batch_finish+0x27b/0xdb0 arch/x86/kernel/alternative.c:2901 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:850 [inline] toggle_allocation_gate+0xfa/0x280 mm/kfence/core.c:842 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148 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: 10062 Comm: syz.3.1327 Not tainted 6.16.0-rc3-syzkaller-00044-g7595b66ae9de #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5601 [inline] RIP: 0010:lock_is_held_type+0x8b/0x150 kernel/locking/lockdep.c:5943 Code: ac 24 f0 0a 00 00 45 31 ff e8 61 14 00 00 65 ff 05 22 b1 4e 08 41 8b 84 24 e8 0a 00 00 85 c0 7f 17 e9 92 00 00 00 41 83 c7 01 <45> 3b bc 24 e8 0a 00 00 0f 8d 80 00 00 00 49 63 c7 48 89 ee 48 8d RSP: 0018:ffffc90000a08e00 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff888033ae28f0 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff8880b8527c98 RDI: ffff888033ae28f0 RBP: ffff8880b8527c98 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff9af65e40 R12: ffff888033ae1e00 R13: ffff888033ae28f0 R14: 00000000ffffffff R15: 0000000000000001 FS: 00007f8f3e4aa6c0(0000) GS:ffff888124859000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8f3e4a9f98 CR3: 0000000048e63000 CR4: 0000000000350ef0 Call Trace: lock_is_held include/linux/lockdep.h:249 [inline] __run_hrtimer kernel/time/hrtimer.c:1727 [inline] __hrtimer_run_queues+0x86a/0xad0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 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 36 d0 17 f6 48 89 df e8 1e 24 18 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 55 44 08 f6 65 8b 05 4e ca 4b 08 85 c0 74 16 5b RSP: 0018:ffffc9001ddc7ca8 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff8880b8427c80 RCX: 0000000000000007 RDX: 0000000000000000 RSI: ffffffff8de15801 RDI: ffffffff8c1567e0 RBP: 0000000000000283 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90a82f57 R11: 0000000000000001 R12: 0000000000000000 R13: 3aef2525c4c74d0b R14: dffffc0000000000 R15: ffff8880b8427c80 clock_was_set+0x599/0x870 kernel/time/hrtimer.c:972 do_settimeofday64+0x323/0x4d0 kernel/time/timekeeping.c:1407 do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195 __do_sys_clock_settime kernel/time/posix-timers.c:1132 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1116 [inline] __x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1116 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8f3d58e929 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:00007f8f3e4aa038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00007f8f3d7b5fa0 RCX: 00007f8f3d58e929 RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0100000000000000 RBP: 00007f8f3d610b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f8f3d7b5fa0 R15: 00007ffc0d86a288