watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [swapper/1:0] Modules linked in: irq event stamp: 47805832 hardirqs last enabled at (47805831): [] default_idle_call+0xcc/0xfc kernel/sched/idle.c:129 hardirqs last disabled at (47805832): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (47805832): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (47805826): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (47805826): [] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650 softirqs last disabled at (47805821): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT 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 : default_idle_call+0xd0/0xfc kernel/sched/idle.c:131 lr : default_idle_call+0xcc/0xfc kernel/sched/idle.c:129 sp : ffff80008eb37d60 x29: ffff80008eb37d60 x28: 0000000000000002 x27: ffff700011d66fb4 x26: 0000000000000000 x25: 0000000000000000 x24: dfff800000000000 x23: 1fffe00018353000 x22: ffff80008897beb8 x21: 1ffff0001112f7d7 x20: 0000000000000000 x19: ffff8000803f3920 x18: 1fffe00034bfbe20 x17: ffff80008897b000 x16: ffff800088a2dc20 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000002d97587 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000867aff84 x2 : 0000000000000000 x1 : ffff0000c1a98000 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) default_idle_call+0xd0/0xfc kernel/sched/idle.c:129 (P) cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x1dc/0x428 kernel/sched/idle.c:352 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:451 secondary_start_kernel+0x1bc/0x1e0 arch/arm64/kernel/smp.c:271 __secondary_switched+0xc0/0xc4 arch/arm64/kernel/head.S:401 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 4705 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 23400005 (nzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : lockdep_enabled kernel/locking/lockdep.c:121 [inline] pc : lock_release+0xa4/0x3b0 kernel/locking/lockdep.c:5881 lr : trace_lock_release include/trace/events/lock.h:69 [inline] lr : lock_release+0x64/0x3b0 kernel/locking/lockdep.c:5879 sp : ffff800094077090 x29: ffff8000940770a0 x28: dfff800000000000 x27: 0000000000000000 x26: 0000000000000000 x25: 0000000000001000 x24: ffff800088920230 x23: 0000000000000000 x22: ffff80008897e000 x21: ffff0000dcc41d00 x20: ffff800088b673e0 x19: ffff800080a9e268 x18: 0000000000000000 x17: 0000000000000000 x16: ffff0001fea147c0 x15: 000000000000e42d x14: 1fffe00034bfaa58 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a3f4d08 x10: 0000000000000003 x9 : ffff80008892e958 x8 : 0000000100000001 x7 : ffff800080a9e0b8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff0000dcc41d00 x0 : 0000000000000001 Call trace: __preempt_count_dec_and_test arch/arm64/include/asm/preempt.h:73 [inline] (P) lockdep_enabled kernel/locking/lockdep.c:121 [inline] (P) lock_release+0xa4/0x3b0 kernel/locking/lockdep.c:5881 (P) rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:960 [inline] pfn_valid+0x2b4/0x2e8 include/linux/mmzone.h:2291 lowmem_page_address include/linux/mm.h:2973 [inline] __free_pages_prepare mm/page_alloc.c:1404 [inline] __free_frozen_pages+0x484/0xbd4 mm/page_alloc.c:2938 ___free_pages+0x1bc/0x1d8 mm/page_alloc.c:5302 __free_pages mm/page_alloc.c:5340 [inline] free_pages+0xd0/0x114 mm/page_alloc.c:5366 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1b0/0x1d8 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xe9c/0x14f0 mm/vmalloc.c:2123 __get_vm_area_node+0x20c/0x32c mm/vmalloc.c:3226 __vmalloc_node_range_noprof+0x2c4/0x10dc mm/vmalloc.c:4024 __vmalloc_node_noprof+0xec/0x14c mm/vmalloc.c:4124 vzalloc_noprof+0x3c/0x4c mm/vmalloc.c:4202 xt_counters_alloc+0x50/0x60 net/netfilter/x_tables.c:1474 __do_replace+0xac/0x8f8 net/ipv4/netfilter/ip_tables.c:1046 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0x918/0xb8c net/ipv4/netfilter/ip_tables.c:1635 nf_setsockopt+0x9c/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x118/0x128 net/ipv4/ip_sockglue.c:1424 tcp_setsockopt+0xcc/0xe8 net/ipv4/tcp.c:4182 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3993 do_sock_setsockopt+0x1f0/0x330 net/socket.c:2381 __sys_setsockopt+0x104/0x170 net/socket.c:2406 __do_sys_setsockopt net/socket.c:2412 [inline] __se_sys_setsockopt net/socket.c:2409 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2409 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 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