watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [kworker/u8:2:41] Modules linked in: irq event stamp: 3932048 hardirqs last enabled at (3932047): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline] hardirqs last enabled at (3932047): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96 hardirqs last disabled at (3932048): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (3932048): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (3932046): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (3932046): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (3931961): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 CPU: 0 UID: 0 PID: 41 Comm: kworker/u8:2 Not tainted 6.16.0-rc5-syzkaller-gec4801305969 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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+0xf08/0x1434 kernel/smp.c:885 lr : csd_lock_wait kernel/smp.c:340 [inline] lr : smp_call_function_many_cond+0xf20/0x1434 kernel/smp.c:885 sp : ffff8000990e7720 x29: ffff8000990e7830 x28: 0000000000000011 x27: dfff800000000000 x26: 0000000000000001 x25: ffff80008f671ff8 x24: ffff00019beb6940 x23: ffffffffffffffff x22: 1fffe000337d6d28 x21: 1fffe000337d6d29 x20: ffff00019bedf308 x19: ffff00019beb6948 x18: 1fffe000337d4076 x17: ffff80008f66e000 x16: ffff80008aefc458 x15: 0000000000000001 x14: 1fffe000337dbe61 x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000337dbe62 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : ffff800080230268 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff800080679514 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+0xf08/0x1434 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_disable_cpuslocked+0xd0/0x1e0 kernel/jump_label.c:240 static_key_disable+0x24/0x38 kernel/jump_label.c:248 toggle_allocation_gate+0x1a4/0x240 mm/kfence/core.c:855 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:843 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 323 Comm: kworker/u8:8 Not tainted 6.16.0-rc5-syzkaller-gec4801305969 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_power_efficient gc_worker 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: ffff0000c614bd00 x27: 0000000000000386 x26: ffff0000c614bd08 x25: ffff80008f66e768 x24: ffff0000c614bd10 x23: ffff0000c614bd00 x22: 1fffe00018c297a1 x21: dfff800000000000 x20: ffff80008f5c018c x19: ffff00019bed8680 x18: 1fffe000337d8876 x17: ffff80010c904000 x16: ffff8000805204e0 x15: 0000000000000001 x14: 1ffff00012e7c1b8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093163c08 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000244302 x7 : ffff800080623ea0 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008ec45390 x0 : ffff80010c904000 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:68 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:887 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73 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:654 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:668 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:673 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 __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) seqcount_lockdep_reader_access+0xe4/0x104 include/linux/seqlock.h:74 (P) nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:333 [inline] gc_worker+0x2a4/0x1184 net/netfilter/nf_conntrack_core.c:1537 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:843