ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 watchdog: BUG: soft lockup - CPU#0 stuck for 226s! [kworker/u8:1:13] Modules linked in: irq event stamp: 3112626 hardirqs last enabled at (3112625): [] irqentry_exit+0x1dd/0x8c0 kernel/entry/common.c:219 hardirqs last disabled at (3112626): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (3112624): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (3112624): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (3112624): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 softirqs last disabled at (3112463): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (3112463): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (3112463): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 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 65 5b 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:ffffc90000127808 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b8540e00 RCX: ffffffff81b288d1 RDX: ffff88801d698000 RSI: ffffffff81b288ab RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88801d698b30 R12: dffffc0000000000 R13: ffffed10170a81c1 R14: 0000000000000001 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888124908000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb15f77df98 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: 11354 Comm: syz-executor 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:kasan_byte_accessible+0x18/0x30 mm/kasan/generic.c:212 Code: 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 0f b6 07 <3c> 07 0f 96 c0 e9 19 8a e8 fe 66 66 2e 0f 1f 84 00 00 00 00 00 0f RSP: 0018:ffffc90000a08d90 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffff8880b8528458 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8b7883a6 RDI: ffffed10170a508b RBP: ffff8880b8528458 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88801dfa66b0 R12: ffffffff8b7883a6 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 000055556e060500(0000) GS:ffff888124a08000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff6bf2e6dc CR3: 0000000089945000 CR4: 0000000000350ef0 Call Trace: __kasan_check_byte+0x13/0x50 mm/kasan/common.c:572 kasan_check_byte include/linux/kasan.h:401 [inline] lock_acquire kernel/locking/lockdep.c:5842 [inline] lock_acquire+0xfc/0x330 kernel/locking/lockdep.c:5825 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170 __run_hrtimer kernel/time/hrtimer.c:1781 [inline] __hrtimer_run_queues+0x2bc/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:kasan_poison_last_granule mm/kasan/shadow.c:156 [inline] RIP: 0010:kasan_unpoison+0x2a/0x60 mm/kasan/shadow.c:182 Code: 0f 1f 40 d6 40 f6 c7 07 75 40 55 48 89 f5 48 8d 76 ff 31 c9 53 48 83 ce 07 31 d2 48 89 fb 48 83 c6 01 e8 f9 fa ff ff 48 89 e8 <83> e0 07 74 14 48 ba 00 00 00 00 00 fc ff df 48 01 eb 48 c1 eb 03 RSP: 0018:ffffc9001d027680 EFLAGS: 00000206 RAX: 0000000000001000 RBX: ffff888021b3e000 RCX: 0000000000000000 RDX: 0000000000000200 RSI: 0000000000000000 RDI: ffffed1004367e00 RBP: 0000000000001000 R08: ffff888021b3e000 R09: ffffed1004367c00 R10: ffffc9001d027678 R11: ffff88801dfa66b0 R12: ffff88813ff27140 R13: 0000000000000c40 R14: 0000000000001000 R15: 0000000000000001 unpoison_slab_object mm/kasan/common.c:335 [inline] __kasan_slab_alloc+0x4e/0x90 mm/kasan/common.c:365 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4948 [inline] slab_alloc_node mm/slub.c:5258 [inline] __do_kmalloc_node mm/slub.c:5651 [inline] __kmalloc_noprof+0x2f6/0x910 mm/slub.c:5664 kmalloc_noprof include/linux/slab.h:961 [inline] tomoyo_realpath_from_path+0xc2/0x6e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x2ab/0x3c0 security/tomoyo/file.c:771 tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334 security_file_open+0x84/0x1e0 security/security.c:2636 do_dentry_open+0x597/0x1590 fs/open.c:939 vfs_open+0x82/0x3f0 fs/open.c:1094 do_open fs/namei.c:4628 [inline] path_openat+0x2078/0x3140 fs/namei.c:4787 do_filp_open+0x20b/0x470 fs/namei.c:4814 do_sys_openat2+0x11f/0x280 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1447 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: 0033:0x7f8fe718f041 Code: 44 24 18 31 c0 41 83 e2 40 75 3e 89 f0 25 00 00 41 00 3d 00 00 41 00 74 30 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 3f 48 8b 54 24 18 64 48 2b 14 25 28 00 00 00 RSP: 002b:00007fff6bf2e660 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f8fe7213d7d RCX: 00007f8fe718f041 RDX: 0000000000090800 RSI: 00007fff6bf2f810 RDI: 00000000ffffff9c RBP: 00007fff6bf2f7fc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000287 R12: 00007fff6bf2f810 R13: 00007f8fe7213d7d R14: 000000000007c8b6 R15: 00007fff6bf2f850