watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/u8:64:7948] Modules linked in: irq event stamp: 501898 hardirqs last enabled at (501897): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (501897): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (501898): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (501898): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (501894): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (501894): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (501855): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 0 UID: 0 PID: 7948 Comm: kworker/u8:64 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 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 : ffff800094d077e0 x29: ffff800094d078d0 x28: 0000000000000011 x27: 0000000000000001 x26: ffff0001ade88980 x25: ffff800088acb6a0 x24: ffffffffffffffff x23: 1fffe00035bd1130 x22: dfff800000000000 x21: 1fffe00035bd1131 x20: ffff0001ade88988 x19: ffff0001adeb22e8 x18: 1fffe00035bce428 x17: 0000000000000003 x16: ffff800088ac7000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: ffff600035bd645e x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805b74b8 x2 : 0000000000000000 x1 : ffff0000d44b8000 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 8734 Comm: syz.8.969 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 : ffff80008eaf7ef0 x29: ffff80008eaf7f80 x28: ffff0000c8a357c8 x27: ffff0000c8a357d0 x26: ffff800096947b40 x25: 0000000000000386 x24: dfff800000000000 x23: ffff0001adeab640 x22: ffff0000c8a357c0 x21: 000000000000000a x20: ffff800088a85640 x19: ffff0001adeab640 x18: 1fffe00035bd2e28 x17: ffff800125426000 x16: ffff80008eaf0000 x15: 00000000200312c0 x14: ffff0001ade9714c x13: 0000000000000001 x12: f5ff8000868f1f80 x11: ffff80008a54fe28 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000001e44 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000002 x1 : ffff0000c8a357c0 x0 : ffff800125426000 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_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:198 (P) spin_unlock_irqrestore include/linux/spinlock.h:408 [inline] __wake_up_common_lock+0x5c/0x78 kernel/sched/wait.c:127 __wake_up_sync_key+0x20/0x2c kernel/sched/wait.c:192 __unix_dgram_recvmsg+0x2b0/0x85c net/unix/af_unix.c:2607 unix_dgram_recvmsg+0xcc/0xe4 net/unix/af_unix.c:2681 sock_recvmsg_nosec+0x94/0x130 net/socket.c:1126 ____sys_recvmsg+0x4fc/0x608 net/socket.c:2902 ___sys_recvmsg+0x16c/0x1f4 net/socket.c:2946 do_recvmmsg+0x288/0x7d4 net/socket.c:3041 __sys_recvmmsg+0x1e0/0x270 net/socket.c:3115 __do_sys_recvmmsg net/socket.c:3138 [inline] __se_sys_recvmmsg net/socket.c:3131 [inline] __arm64_sys_recvmmsg+0xdc/0x104 net/socket.c:3131 __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