watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u8:1:13] Modules linked in: irq event stamp: 340932 hardirqs last enabled at (340931): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (340931): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (340932): [] __el1_irq arch/arm64/kernel/entry-common.c:580 [inline] hardirqs last disabled at (340932): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:598 softirqs last enabled at (340924): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (340924): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (340727): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.15.0-rc7-syzkaller-g187899f4124a #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events_unbound toggle_allocation_gate pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:340 [inline] pc : smp_call_function_many_cond+0xe14/0x1308 kernel/smp.c:885 lr : csd_lock_wait kernel/smp.c:340 [inline] lr : smp_call_function_many_cond+0xe2c/0x1308 kernel/smp.c:885 sp : ffff8000976677b0 x29: ffff800097667830 x28: 0000000000000011 x27: 0000000000000001 x26: dfff800000000000 x25: ffff80008f321e88 x24: ffff00019c36b8c0 x23: ffffffffffffffff x22: 1fffe0003386d718 x21: 1fffe0003386d719 x20: ffff00019c3940e8 x19: ffff00019c36b8c8 x18: 1fffe0003386aa76 x17: ffff80008f31e000 x16: ffff80008adbe9e4 x15: 0000000000000001 x14: 1fffe0003387281d x13: 0000000000000000 x12: 0000000000000000 x11: ffff60003387281e x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : ffff80008022ec04 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff800080672898 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:340 [inline] (P) smp_call_function_many_cond+0xe14/0x1308 kernel/smp.c:885 (P) smp_call_function_many kernel/smp.c:909 [inline] smp_call_function kernel/smp.c:931 [inline] kick_all_cpus_sync+0x40/0xa0 kernel/smp.c:1076 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:850 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.15.0-rc7-syzkaller-g187899f4124a #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (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+0x1f8/0xc88 kernel/softirq.c:563 lr : handle_softirqs+0x1f4/0xc88 kernel/softirq.c:563 sp : ffff800080017ee0 x29: ffff800080017f80 x28: ffff0000c1a0db80 x27: 0000000000000386 x26: ffff0000c1a0db88 x25: ffff80008f31e6e8 x24: ffff0000c1a0db90 x23: ffff0000c1a0db80 x22: 1fffe00018341b71 x21: dfff800000000000 x20: ffff80008f26d18c x19: ffff00019c38d640 x18: 1fffe0003386f276 x17: ffff80010d10c000 x16: ffff80008051cacc x15: 0000000000000001 x14: 1ffff00012df6bb8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700012df6bb9 x10: 0000000000000003 x9 : 0000000000000000 x8 : 000000000006f370 x7 : ffff80008061e30c x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : ffff800080017f80 x1 : ffff80008e9058f1 x0 : ffff80010d10c000 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+0x1f8/0xc88 kernel/softirq.c:563 (P) __do_softirq+0x14/0x20 kernel/softirq.c:613 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 invoke_softirq kernel/softirq.c:460 [inline] __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:680 irq_exit_rcu+0x14/0x84 kernel/softirq.c:696 __el1_irq arch/arm64/kernel/entry-common.c:584 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:598 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:603 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596 __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:185 [inline] do_idle+0x1d8/0x454 kernel/sched/idle.c:325 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:423 secondary_start_kernel+0x1b8/0x1e0 arch/arm64/kernel/smp.c:279 __secondary_switched+0xc0/0xc4 arch/arm64/kernel/head.S:401