watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [kworker/u8:3:42] Modules linked in: irq event stamp: 614580 hardirqs last enabled at (614579): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (614579): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (614580): [] __enter_from_kernel_mode arch/arm64/kernel/entry-common.c:43 [inline] hardirqs last disabled at (614580): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:50 softirqs last enabled at (614546): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (614546): [] nsim_dev_trap_report drivers/net/netdevsim/dev.c:835 [inline] softirqs last enabled at (614546): [] nsim_dev_trap_report_work+0x67c/0x9fc drivers/net/netdevsim/dev.c:866 softirqs last disabled at (614544): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (614544): [] nsim_dev_trap_report drivers/net/netdevsim/dev.c:831 [inline] softirqs last disabled at (614544): [] nsim_dev_trap_report_work+0x5f4/0x9fc drivers/net/netdevsim/dev.c:866 CPU: 1 UID: 0 PID: 42 Comm: kworker/u8:3 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events_unbound toggle_allocation_gate 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+0xee8/0x1418 kernel/smp.c:877 lr : csd_lock_wait kernel/smp.c:342 [inline] lr : smp_call_function_many_cond+0xf00/0x1418 kernel/smp.c:877 sp : ffff8000990c7740 x29: ffff8000990c7850 x28: 0000000000000011 x27: ffff00019bf15a40 x26: 0000000000000000 x25: ffff80008f581f28 x24: ffffffffffffffff x23: 1fffe000337e2b48 x22: dfff800000000000 x21: 1fffe000337e2b49 x20: ffff00019bef8548 x19: ffff00019bf15a48 x18: 00000000b31504b8 x17: dfff800000000000 x16: ffff800082deb6c0 x15: 0000000000000001 x14: 1fffe000337df0a9 x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000337df0aa x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : ffff80008022ca60 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff80008068dc28 x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:231 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) csd_lock_wait kernel/smp.c:342 [inline] (P) smp_call_function_many_cond+0xee8/0x1418 kernel/smp.c:877 (P) smp_call_function_many kernel/smp.c:900 [inline] smp_call_function kernel/smp.c:922 [inline] kick_all_cpus_sync+0x40/0xa0 kernel/smp.c:1067 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34 __jump_label_update+0x30c/0x334 kernel/jump_label.c:521 jump_label_update+0x3f0/0x484 kernel/jump_label.c:919 static_key_enable_cpuslocked+0x11c/0x220 kernel/jump_label.c:210 static_key_enable+0x24/0x38 kernel/jump_label.c:223 toggle_allocation_gate+0xbc/0x240 mm/kfence/core.c:852 process_one_work+0x7e8/0x155c kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:50 lr : default_idle_call+0xd0/0xfc kernel/sched/idle.c:129 sp : ffff80008f4f7d20 x29: ffff80008f4f7d20 x28: 0000000000000001 x27: dfff800000000000 x26: 1ffff00011e9efac x25: 0000000000000000 x24: 0000000000000000 x23: 1ffff00011eb4c30 x22: ffff80008f57e768 x21: 1ffff00011eafced x20: 0000000000000000 x19: ffff8000804cb400 x18: 1fffe000337db690 x17: ffff80008f57e000 x16: ffff8000804cad24 x15: 0000000000000001 x14: 1fffe000337dd340 x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000337dd341 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000a01af x7 : ffff800080662b98 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008adf3354 x2 : 0000000000000000 x1 : ffff80008eb97a06 x0 : ffff80010ca0e000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P) arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:48 (P) cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0x1d8/0x454 kernel/sched/idle.c:330 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:428 rest_init+0x2d8/0x2f4 init/main.c:757 start_kernel+0x394/0x3e4 init/main.c:1111 __primary_switched+0x8c/0x94 arch/arm64/kernel/head.S:246