watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.9.390:8020] Modules linked in: irq event stamp: 10675493 hardirqs last enabled at (10675492): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (10675493): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (1800): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1800): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1800): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (2381): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (2381): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (2381): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 8020 Comm: syz.9.390 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:unwind_next_frame+0xeae/0x23c0 arch/x86/kernel/unwind_orc.c:-1 Code: 8b 5c 24 78 4c 8b 64 24 48 74 08 48 89 df e8 99 5a b9 00 48 8b 44 24 18 48 89 03 ba 10 00 00 00 4c 89 e7 31 f6 e8 62 5c b9 00 <48> 8b 14 24 e9 ca 04 00 00 4c 89 64 24 18 4d 8d 6e 08 4c 89 e8 48 RSP: 0018:ffffc90000a08278 EFLAGS: 00000246 RAX: ffffc90000a083f8 RBX: ffffc90000a083e0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000a08408 RBP: dffffc0000000000 R08: ffffc90000a08407 R09: 0000000000000000 R10: ffffc90000a083f8 R11: fffff52000141081 R12: ffffc90000a083f8 R13: 1ffff92000141077 R14: ffffc90000a083a8 R15: ffffc90000a083f0 FS: 00007f8b997a86c0(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000297e4000 CR4: 00000000003526f0 DR0: 0000200000000100 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __unwind_start+0x5b8/0x760 arch/x86/kernel/unwind_orc.c:773 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x31c/0x660 mm/slub.c:5383 kmalloc_noprof include/linux/slab.h:950 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] ref_tracker_alloc+0x15a/0x4c0 lib/ref_tracker.c:270 __netdev_tracker_alloc include/linux/netdevice.h:4403 [inline] netdev_hold include/linux/netdevice.h:4432 [inline] dst_init+0xd9/0x480 net/core/dst.c:52 dst_alloc+0x12a/0x170 net/core/dst.c:94 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x440 net/ipv6/route.c:3336 ndisc_send_skb+0x44a/0x1670 net/ipv6/ndisc.c:491 addrconf_rs_timer+0x395/0x6d0 net/ipv6/addrconf.c:4041 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:422 [inline] RIP: 0010:unwind_next_frame+0xe68/0x23c0 arch/x86/kernel/unwind_orc.c:600 Code: 96 c0 20 c8 3c 01 0f 85 ca 0b 00 00 48 89 df e8 be 21 00 00 48 89 c3 48 bd 00 00 00 00 00 fc ff df 48 8b 44 24 30 80 3c 28 00 <4c> 8b 7c 24 10 74 08 4c 89 ff e8 b9 5a b9 00 49 89 1f 48 8b 44 24 RSP: 0018:ffffc900033e72f8 EFLAGS: 00000246 RAX: 1ffff9200067ce82 RBX: ffffffff822fdd6d RCX: 1ffff9200067ce01 RDX: ffffffff90b3c57c RSI: 0000000000000002 RDI: ffffc900033e7738 RBP: dffffc0000000000 R08: 0000000000000012 R09: ffffffff8e75e3e0 R10: ffffc900033e70a0 R11: ffffffff81b0bfa0 R12: ffffc900033e8000 R13: 1ffff9200067ce7b R14: ffffc900033e73c8 R15: ffffc900033e0000 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 __call_rcu_common kernel/rcu/tree.c:3131 [inline] call_rcu+0xee/0x890 kernel/rcu/tree.c:3251 context_switch kernel/sched/core.c:5298 [inline] __schedule+0x15e5/0x52d0 kernel/sched/core.c:6908 __schedule_loop kernel/sched/core.c:6990 [inline] schedule+0x164/0x360 kernel/sched/core.c:7005 futex_do_wait kernel/futex/waitwake.c:358 [inline] __futex_wait+0x1ee/0x420 kernel/futex/waitwake.c:687 futex_wait+0x119/0x380 kernel/futex/waitwake.c:715 do_futex+0x333/0x420 kernel/futex/syscalls.c:130 __do_sys_futex kernel/futex/syscalls.c:207 [inline] __se_sys_futex+0x3a8/0x450 kernel/futex/syscalls.c:188 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8b9899c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8b997a80e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f8b98c16188 RCX: 00007f8b9899c799 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8b98c16188 RBP: 00007f8b98c16180 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8b98c16218 R14: 00007ffdfc2a3ae0 R15: 00007ffdfc2a3bc8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 8005 Comm: syz.7.386 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:ip6t_do_table+0xd9f/0x1560 net/ipv6/netfilter/ip6_tables.c:337 Code: 49 83 c7 20 4c 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28 84 c0 48 8b 5c 24 08 0f 85 a9 04 00 00 4d 63 3f <31> ff 44 89 fe e8 e7 2b 5b f7 4d 85 ff 0f 88 31 01 00 00 49 8d be RSP: 0018:ffffc90000007440 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888058078ad0 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000007630 R08: ffffc900000075af R09: 0000000000000000 R10: ffffc90000007590 R11: fffff52000000eb6 R12: ffff888058fa90f0 R13: dffffc0000000000 R14: ffff888058fa9040 R15: fffffffffffffffe FS: 00007ff5dbfee6c0(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b34110ff8 CR3: 000000007a816000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: ip6table_mangle_hook+0x2b3/0x740 net/ipv6/netfilter/ip6table_mangle.c:73 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:623 nf_hook_slow_list+0x1d0/0x3a0 net/netfilter/core.c:660 NF_HOOK_LIST include/linux/netfilter.h:354 [inline] ip6_sublist_rcv+0xc8c/0xda0 net/ipv6/ip6_input.c:319 ipv6_list_rcv+0x3f4/0x450 net/ipv6/ip6_input.c:355 __netif_receive_skb_list_ptype net/core/dev.c:6207 [inline] __netif_receive_skb_list_core+0x5ff/0x810 net/core/dev.c:6254 __netif_receive_skb_list net/core/dev.c:6306 [inline] netif_receive_skb_list_internal+0x995/0xcf0 net/core/dev.c:6397 netif_receive_skb_list+0x55/0x4b0 net/core/dev.c:6449 ieee80211_rx_napi+0x35d/0x3e0 net/mac80211/rx.c:5615 ieee80211_rx include/net/mac80211.h:5267 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:-1 [inline] RIP: 0010:rcu_is_watching+0x1c/0xb0 kernel/rcu/tree.c:752 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 80 1e 71 11 e8 eb 4a 03 0a 89 c3 83 f8 08 73 65 <49> bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 90 d7 1a 8e 4c 89 f0 48 RSP: 0018:ffffc90002f07850 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000080000001 RDX: ffff888030c0db80 RSI: ffffffff8c27b360 RDI: ffffffff8c27b320 RBP: 0000000000000001 R08: ffffffff81d54476 R09: ffffffff8e75e3e0 R10: ffffc90002f07640 R11: ffffffffa0206794 R12: ffff888030c0db80 R13: ffff888035672460 R14: 00007ff5ddd9c799 R15: 1ffff920005e0f2a rcu_read_lock include/linux/rcupdate.h:851 [inline] is_bpf_text_address+0x64/0x2b0 kernel/bpf/core.c:748 kernel_text_address+0xa5/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4542 [inline] slab_alloc_node mm/slub.c:4869 [inline] kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4876 lsm_inode_alloc security/security.c:228 [inline] security_inode_alloc+0x39/0x310 security/security.c:1189 inode_init_always_gfp+0x9ed/0xdc0 fs/inode.c:307 inode_init_always include/linux/fs.h:2922 [inline] alloc_inode+0x82/0x1b0 fs/inode.c:354 new_inode_pseudo include/linux/fs.h:3003 [inline] sock_alloc net/socket.c:637 [inline] __sock_create+0x12d/0x9d0 net/socket.c:1569 sock_create net/socket.c:1663 [inline] __sys_socketpair+0x239/0x560 net/socket.c:1814 __do_sys_socketpair net/socket.c:1863 [inline] __se_sys_socketpair net/socket.c:1860 [inline] __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1860 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff5ddd9c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff5dbfee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007ff5de015fa0 RCX: 00007ff5ddd9c799 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 00007ff5dde32bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff5de016038 R14: 00007ff5de015fa0 R15: 00007fff10d09648