watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz.6.183:5781] Modules linked in: irq event stamp: 161510 hardirqs last enabled at (161509): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (161509): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (161510): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (161510): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (161502): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (161502): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (161211): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 0 UID: 0 PID: 5781 Comm: syz.6.183 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 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+0xfd0/0x1640 kernel/smp.c:892 lr : csd_lock_wait kernel/smp.c:342 [inline] lr : smp_call_function_many_cond+0xfe8/0x1640 kernel/smp.c:892 sp : ffff800094a779e0 x29: ffff800094a77ac0 x28: 0000000000000011 x27: 0000000000000001 x26: ffff0001adf72780 x25: ffff800088a0f680 x24: ffffffffffffffff x23: 1fffe00035bee4f0 x22: dfff800000000000 x21: 1fffe00035bee4f1 x20: ffff0001adf72788 x19: ffff0001adf9c0a8 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: ffff600035bf3816 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805a8f60 x2 : 0000000000000000 x1 : ffff0000d8dcba00 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+0xfd0/0x1640 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+0x31c/0x344 kernel/jump_label.c:521 jump_label_update+0x428/0x4b8 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] static_key_slow_dec+0x54/0xb0 kernel/jump_label.c:336 bpf_stats_release+0x34/0x50 kernel/bpf/syscall.c:6018 __fput+0x338/0x74c fs/file_table.c:510 ____fput+0x20/0x30 fs/file_table.c:538 task_work_run+0x1cc/0x25c kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0x10c/0x17c kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:88 [inline] el0_svc+0x18c/0x260 arch/arm64/kernel/entry-common.c:737 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:-1 [inline] pc : arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] pc : handle_softirqs+0x1cc/0xd98 kernel/softirq.c:606 lr : handle_softirqs+0x1c8/0xd98 kernel/softirq.c:606 sp : ffff80008ea27ef0 x29: ffff80008ea27f80 x28: ffff0000c1a58008 x27: ffff0000c1a58010 x26: ffff800088a0b000 x25: 0000000000000386 x24: dfff800000000000 x23: ffff0001adf95480 x22: ffff0000c1a58000 x21: 000000000000000a x20: ffff8000889c4480 x19: ffff0001adf95480 x18: 1fffe00035bf0220 x17: ffff8001255d1000 x16: ffff80008ea20000 x15: 0000000000000000 x14: 000050822105d180 x13: 0000000000000001 x12: 0000000000000000 x11: ffff800080156354 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000a07e4 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801563fc x2 : 0000000000000000 x1 : ffff0000c1a58000 x0 : ffff8001255d1000 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+0x1cc/0xd98 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:510 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:522 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:527 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:590 __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) default_idle_call+0xd0/0xfc kernel/sched/idle.c:129 (P) cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x1e8/0x428 kernel/sched/idle.c:352 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:451 secondary_start_kernel+0x1bc/0x1e0 arch/arm64/kernel/smp.c:271 __secondary_switched+0xc0/0xc4 arch/arm64/kernel/head.S:401