watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [kworker/u8:19:19379] Modules linked in: irq event stamp: 1829568 hardirqs last enabled at (1829567): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (1829567): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline] hardirqs last enabled at (1829567): [] irqentry_exit+0x24d/0x970 kernel/entry/common.c:164 hardirqs last disabled at (1829568): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1061 softirqs last enabled at (1829566): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1829566): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1829566): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 softirqs last disabled at (1829537): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1829537): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1829537): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 19379 Comm: kworker/u8:19 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x58e/0x1700 kernel/smp.c:892 Code: 00 fc ff df 48 8b 54 24 08 49 89 d5 49 89 d4 49 c1 ed 03 41 83 e4 07 49 01 c5 41 83 c4 03 e8 89 83 0c 00 f3 90 41 0f b6 45 00 <41> 38 c4 7c 08 84 c0 0f 85 63 0f 00 00 8b 45 08 31 ff 83 e0 01 41 RSP: 0018:ffffc90006def870 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fc0b3d RDX: ffff88803351be00 RSI: ffffffff81fc0b17 RDI: ffff88803351be00 RBP: ffff8880b84433c0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed1017088679 R14: 0000000000000001 R15: ffff8880b853c940 FS: 0000000000000000(0000) GS:ffff888124487000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c335e7a CR3: 000000000e596000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057 on_each_cpu include/linux/smp.h:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline] smp_text_poke_batch_finish+0x337/0xc60 arch/x86/kernel/alternative.c:2983 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x37a/0x550 kernel/jump_label.c:910 static_key_enable_cpuslocked+0x1bc/0x270 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate mm/kfence/core.c:906 [inline] toggle_allocation_gate+0xfe/0x2d0 mm/kfence/core.c:898 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314 process_scheduled_works kernel/workqueue.c:3397 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 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: 24483 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:lock_is_held include/linux/lockdep.h:249 [inline] RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1896 [inline] RIP: 0010:__hrtimer_run_queues+0x7c5/0xa00 kernel/time/hrtimer.c:1994 Code: 48 8d 3d ce 99 e6 0e 67 48 0f b9 3a e9 3d fc ff ff e8 df 2a 14 00 48 8b 04 24 be ff ff ff ff 48 8d 78 18 e8 ed cc 93 09 31 ff <89> c3 89 c6 e8 72 25 14 00 85 db 0f 85 06 fb ff ff e8 b5 2a 14 00 RSP: 0018:ffffc90000007e88 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000046 RSI: ffffffff8def7576 RDI: 0000000000000000 RBP: ffff8880b8428600 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880294bf300 R13: 0000000000000001 R14: dffffc0000000000 R15: 1bc16d6753b716ed FS: 0000555588255500(0000) GS:ffff888124387000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa746d456b8 CR3: 0000000084681000 CR4: 0000000000350ef0 Call Trace: hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] __sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:get_current arch/x86/include/asm/current.h:23 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xf/0x70 kernel/kcov.c:216 Code: 00 00 00 5b e9 32 7e ef 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 85 01 01 12 48 8b 34 24 <65> 48 8b 15 61 01 01 12 a9 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 RSP: 0018:ffffc900055d7540 EFLAGS: 00000282 RAX: 0000000080000002 RBX: 80000000909c3007 RCX: ffffffff825b193e RDX: 80000000909c3007 RSI: ffffffff825b194c RDI: ffff888039731f00 RBP: 80000000909c3007 R08: 0000000000000007 R09: 0000000000000000 R10: 80000000909c3007 R11: 0000000000000000 R12: 0000000000000008 R13: 00000000000140dc R14: ffff888084678de0 R15: 00007fa745000000 pte_flags arch/x86/include/asm/pgtable_types.h:481 [inline] pte_present arch/x86/include/asm/pgtable.h:961 [inline] copy_pte_range mm/memory.c:1295 [inline] copy_pmd_range mm/memory.c:1408 [inline] copy_pud_range mm/memory.c:1445 [inline] copy_p4d_range mm/memory.c:1469 [inline] copy_page_range+0x115c/0x5b20 mm/memory.c:1555 dup_mmap+0xd44/0x21b0 mm/mmap.c:1840 dup_mm kernel/fork.c:1534 [inline] copy_mm kernel/fork.c:1586 [inline] copy_process+0x6c78/0x7ed0 kernel/fork.c:2264 kernel_clone+0x176/0x9e0 kernel/fork.c:2722 __do_sys_clone+0xd9/0x120 kernel/fork.c:2863 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa745fc58d2 Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00 RSP: 002b:00007ffc7e426090 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc7e426090 RCX: 00007fa745fc58d2 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc7e42621c R08: 0000000000000000 R09: 0000000000000001 R10: 00005555882557d0 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000000927c0 R14: 000000000012b742 R15: 00007ffc7e426270