watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u8:4:140] Modules linked in: irq event stamp: 3451330 hardirqs last enabled at (3451329): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (3451329): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (3451330): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (3451330): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (3451326): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (3451326): [] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650 softirqs last disabled at (3451265): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 0 UID: 0 PID: 140 Comm: kworker/u8:4 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_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+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 : ffff8000923e7780 x29: ffff8000923e7890 x28: dfff800000000000 x27: ffff0001a5fd0780 x26: 0000000000000011 x25: 0000000000000001 x24: ffff80008897f680 x23: ffffffffffffffff x22: 1fffe00034bfa0f0 x21: 1fffe00034bfa0f1 x20: ffff0001a5ffa0a8 x19: ffff0001a5fd0788 x18: 00000000c666c280 x17: 00000000ffaffc3f x16: dfff800000000000 x15: 00000000de5b755a x14: 00000000ffff8000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805a47c4 x2 : 0000000000000000 x1 : ffff0000c5031d00 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_enable_cpuslocked+0x11c/0x220 kernel/jump_label.c:210 static_key_enable+0x24/0x38 kernel/jump_label.c:223 toggle_allocation_gate+0xb8/0x28c mm/kfence/core.c:906 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: 10636 Comm: dhcpcd-run-hook 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: ffff0000f701ba10 x27: 0000000000000386 x26: ffff0000f701ba08 x25: 1fffe0001ee03741 x24: 0000000000000000 x23: ffff0000f701ba00 x22: dfff800000000000 x21: ffff0001a5ff3480 x20: ffff80008891febc x19: ffff0001a5ff3480 x18: 0000000000000000 x17: ffff80011d6bf000 x16: ffff80008e990000 x15: 0000000000000000 x14: 00004c0b8cc3e680 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a3f4d08 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000001c4 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080155224 x2 : 0000000000000002 x1 : ffff0000f701ba00 x0 : ffff80011d6bf000 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: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_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) lock_acquire+0x16c/0x368 kernel/locking/lockdep.c:5871 (P) rcu_lock_acquire include/linux/rcupdate.h:300 [inline] rcu_read_lock_sched include/linux/rcupdate.h:936 [inline] pfn_valid+0x128/0x470 include/linux/mmzone.h:2281 page_table_check_set+0x3c/0x524 mm/page_table_check.c:105 __page_table_check_ptes_set+0x21c/0x254 mm/page_table_check.c:212 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline] __set_ptes_anysz+0x4dc/0x51c arch/arm64/include/asm/pgtable.h:681 __set_ptes arch/arm64/include/asm/pgtable.h:714 [inline] set_ptes arch/arm64/include/asm/pgtable.h:1782 [inline] set_pte_range+0x49c/0x614 mm/memory.c:5637 filemap_map_order0_folio mm/filemap.c:3862 [inline] filemap_map_pages+0x101c/0x1cf0 mm/filemap.c:3932 do_fault_around mm/memory.c:5867 [inline] do_read_fault mm/memory.c:5900 [inline] do_fault mm/memory.c:6043 [inline] do_pte_missing+0x17d0/0x28a4 mm/memory.c:4566 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6565 [inline] handle_mm_fault+0x1558/0x2454 mm/memory.c:6734 do_page_fault+0x768/0xb64 arch/arm64/mm/fault.c:704 do_translation_fault+0xc4/0x114 arch/arm64/mm/fault.c:840 do_mem_abort+0x70/0x190 arch/arm64/mm/fault.c:980 el0_ia+0xc0/0x300 arch/arm64/kernel/entry-common.c:570 el0t_64_sync_handler+0xc4/0x148 arch/arm64/kernel/entry-common.c:761 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594