watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [kworker/u8:5:1457] Modules linked in: irq event stamp: 521140 hardirqs last enabled at (521139): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (521139): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (521140): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (521140): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (521132): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (521132): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (521111): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 1 UID: 0 PID: 1457 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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+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 : ffff8000948d77e0 x29: ffff8000948d78d0 x28: 0000000000000011 x27: 0000000000000000 x26: ffff0001adead980 x25: ffff800088acb6a0 x24: ffffffffffffffff x23: 1fffe00035bd5b30 x22: dfff800000000000 x21: 1fffe00035bd5b31 x20: ffff0001adead988 x19: ffff0001ade8ee08 x18: 1fffe00035bd2e28 x17: 0000000000000003 x16: ffff800088ac7000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: ffff600035bd1dc2 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805b74b8 x2 : 0000000000000000 x1 : ffff0000c9021d40 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_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:911 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6168 Comm: syz.3.258 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff80008eae7ef0 x29: ffff80008eae7f80 x28: ffff0000c9c957c8 x27: ffff0000c9c957d0 x26: 0000000000000001 x25: 0000000000000186 x24: dfff800000000000 x23: ffff0001ade86640 x22: ffff0000c9c957c0 x21: 000000000000000a x20: ffff800088a85640 x19: ffff0001ade86640 x18: 00000000720ab561 x17: ffff800125401000 x16: ffff80008eae0000 x15: 0000000000000000 x14: 00005017e7987c00 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a54fe28 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000001508 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000002 x1 : ffff0000c9c957c0 x0 : ffff800125401000 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 alloc_from_pcs mm/slub.c:4800 [inline] (P) slab_alloc_node mm/slub.c:4933 [inline] (P) __kmalloc_cache_node_noprof+0x224/0x60c mm/slub.c:5530 (P) _kmalloc_node_noprof include/linux/slab.h:1174 [inline] alloc_cpumask_var_node+0x90/0x138 lib/cpumask.c:30 alloc_cpumask_var include/linux/cpumask.h:1054 [inline] zalloc_cpumask_var include/linux/cpumask.h:1060 [inline] clock_was_set+0xa0/0x674 kernel/time/hrtimer.c:982 do_adjtimex+0x208/0x2f0 kernel/time/timekeeping.c:3006 posix_clock_realtime_adj+0x20/0x30 kernel/time/posix-timers.c:207 do_clock_adjtime+0x120/0x140 kernel/time/posix-timers.c:1169 __do_sys_clock_adjtime kernel/time/posix-timers.c:1181 [inline] __se_sys_clock_adjtime kernel/time/posix-timers.c:1172 [inline] __arm64_sys_clock_adjtime+0x17c/0x2a8 kernel/time/posix-timers.c:1172 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594