watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [kworker/0:0:9] Modules linked in: irq event stamp: 394870 hardirqs last enabled at (394869): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (394869): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (394870): [] __el1_irq arch/arm64/kernel/entry-common.c:510 [inline] hardirqs last disabled at (394870): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:526 softirqs last enabled at (394856): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (394856): [] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650 softirqs last disabled at (394813): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events jump_label_update_timeout pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:342 [inline] pc : smp_call_function_many_cond+0xfa4/0x1614 kernel/smp.c:892 lr : csd_lock_wait kernel/smp.c:342 [inline] lr : smp_call_function_many_cond+0xfbc/0x1614 kernel/smp.c:892 sp : ffff80008ea87880 x29: ffff80008ea87980 x28: dfff800000000000 x27: ffff0001ae0575c0 x26: 0000000000000011 x25: 0000000000000001 x24: ffff80008897f680 x23: ffffffffffffffff x22: 1fffe00035c0aeb8 x21: 1fffe00035c0aeb9 x20: ffff0001ae080ee8 x19: ffff0001ae0575c8 x18: 1fffe00035c08220 x17: ffff80008897b000 x16: ffff800088a2dba0 x15: ffff0001ae04110c x14: ffff0001ae041108 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805a3760 x2 : 0000000000000000 x1 : ffff0000c19ed700 x0 : 0000000000000000 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:233 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:259 [inline] (P) csd_lock_wait kernel/smp.c:342 [inline] (P) smp_call_function_many_cond+0xfa4/0x1614 kernel/smp.c:892 (P) smp_call_function_many kernel/smp.c:915 [inline] smp_call_function+0x58/0xbc kernel/smp.c:935 kick_all_cpus_sync+0x28/0x34 kernel/smp.c:1081 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34 __jump_label_update+0x314/0x33c kernel/jump_label.c:521 jump_label_update+0x41c/0x4a8 kernel/jump_label.c:910 __static_key_slow_dec_cpuslocked+0xc4/0x138 kernel/jump_label.c:315 __static_key_slow_dec kernel/jump_label.c:321 [inline] jump_label_update_timeout+0x28/0x3c kernel/jump_label.c:329 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x79c/0x1098 kernel/workqueue.c:3397 worker_thread+0x754/0xba0 kernel/workqueue.c:3478 kthread+0x2f8/0x3c8 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 4346 Comm: udevd Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : handle_softirqs+0x1d0/0xd34 kernel/softirq.c:610 lr : handle_softirqs+0x1cc/0xd34 kernel/softirq.c:606 sp : ffff80008e997ee0 x29: ffff80008e997f80 x28: ffff0000d577d710 x27: 0000000000000386 x26: ffff0000d577d708 x25: 1fffe0001aaefae1 x24: ffff800094a37540 x23: ffff0000d577d700 x22: dfff800000000000 x21: ffff0001ae07a2c0 x20: ffff80008891fecc x19: ffff0001ae07a2c0 x18: 0000000000000000 x17: ffff800125746000 x16: ffff80008e990000 x15: 0000000000000000 x14: 00005080780aa700 x13: 0000000000000001 x12: 0000000000000000 x11: ffff800080154b2c x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000003fb73c x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080154bd4 x2 : 0000000000000000 x1 : ffff0000d577d700 x0 : ffff800125746000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P) arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P) handle_softirqs+0x1d0/0xd34 kernel/softirq.c:606 (P) __do_softirq+0x14/0x20 kernel/softirq.c:656 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 invoke_softirq kernel/softirq.c:503 [inline] __irq_exit_rcu+0x1ac/0x428 kernel/softirq.c:735 irq_exit_rcu+0x14/0x84 kernel/softirq.c:752 __el1_irq arch/arm64/kernel/entry-common.c:514 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:526 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:531 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:590 kunwind_next arch/arm64/kernel/stacktrace.c:275 [inline] (P) do_kunwind arch/arm64/kernel/stacktrace.c:295 [inline] (P) kunwind_stack_walk arch/arm64/kernel/stacktrace.c:366 [inline] (P) arch_stack_walk+0x2dc/0x328 arch/arm64/kernel/stacktrace.c:390 (P) return_address+0x98/0x108 arch/arm64/kernel/return_address.c:42 get_lock_parent_ip include/linux/ftrace.h:1170 [inline] preempt_latency_start kernel/sched/core.c:5837 [inline] preempt_count_add+0xfc/0x2f4 kernel/sched/core.c:5862 __raw_spin_lock include/linux/spinlock_api_smp.h:157 [inline] _raw_spin_lock+0x20/0x60 kernel/locking/spinlock.c:158 spin_lock include/linux/spinlock.h:342 [inline] fast_dput+0xfc/0x39c fs/dcache.c:876 dput+0xf0/0x1b4 fs/dcache.c:972 step_into_slowpath+0x230/0x660 fs/namei.c:2114 step_into fs/namei.c:2148 [inline] walk_component fs/namei.c:2284 [inline] link_path_walk+0xb20/0x150c fs/namei.c:2652 path_openat+0x1d8/0x2a6c fs/namei.c:4854 do_file_open+0x1c4/0x2e4 fs/namei.c:4887 do_sys_openat2+0x114/0x1e8 fs/open.c:1364 do_sys_open+0xac/0xdc fs/open.c:1370 __do_sys_openat fs/open.c:1386 [inline] __se_sys_openat fs/open.c:1381 [inline] __arm64_sys_openat+0x9c/0xb8 fs/open.c:1381 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594