watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.4.136:6652] Modules linked in: irq event stamp: 11104869 hardirqs last enabled at (11104868): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (11104869): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (11000130): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (11000130): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (11000130): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (11000133): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (11000133): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (11000133): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 6652 Comm: syz.4.136 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:ip6_output+0x0/0x550 net/ipv6/ip6_output.c:228 Code: 79 8c e8 e3 1d aa f7 e9 a2 fc ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 d3 48 RSP: 0018:ffffc90000a088d8 EFLAGS: 00000282 RAX: ffffffff89fd9d45 RBX: 0000000000000001 RCX: ffff888024f99e40 RDX: ffff888029016640 RSI: ffff88814ce3a100 RDI: ffff88806c678000 RBP: ffffc90000a08ab0 R08: ffffc90000a08517 R09: 0000000000000000 R10: ffffc90000a08508 R11: fffff520001410a3 R12: ffff88806c678000 R13: ffff88807be88000 R14: ffff888031f1b000 R15: 0000000000000001 FS: 00007f80d736f6c0(0000) GS:ffff88812623e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000331d6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: NF_HOOK include/linux/netfilter.h:318 [inline] ndisc_send_skb+0xbce/0x1510 net/ipv6/ndisc.c:512 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:printk_get_next_message+0x4/0x7b0 kernel/printk/printk.c:2955 Code: cf 1f 00 48 89 df 48 c7 c6 e0 87 6b 8b 5b e9 d3 fc ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 01 RSP: 0018:ffffc90002f86818 EFLAGS: 00000246 RAX: 1ffffffff1cecf0b RBX: ffffffff8e767858 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000b25 RDI: ffffc90002f86880 RBP: ffffc90002f86970 R08: ffffffff997d68e0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8e767800 console_emit_next_record kernel/printk/printk.c:3065 [inline] console_flush_all+0x4ca/0xb10 kernel/printk/printk.c:3199 __console_flush_and_unlock kernel/printk/printk.c:3258 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3298 vprintk_emit+0x4c5/0x590 kernel/printk/printk.c:2423 _printk+0xcf/0x120 kernel/printk/printk.c:2448 __nla_validate_parse+0x2563/0x2d40 lib/nlattr.c:647 __nla_parse+0x40/0x60 lib/nlattr.c:732 nla_parse_nested_deprecated include/net/netlink.h:1379 [inline] mpls_build_state+0xde/0x4e0 net/mpls/mpls_iptunnel.c:174 lwtunnel_build_state+0x384/0x4c0 net/core/lwtunnel.c:137 fib_nh_common_init+0x127/0x3b0 net/ipv4/fib_semantics.c:628 fib_nh_init+0x9e/0x410 net/ipv4/fib_semantics.c:654 fib_create_info+0x1be6/0x3210 net/ipv4/fib_semantics.c:1442 fib_table_insert+0xc6/0x1b50 net/ipv4/fib_trie.c:1212 inet_rtm_newroute+0x12b/0x210 net/ipv4/fib_frontend.c:930 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f80d658efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f80d736f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f80d67e5fa0 RCX: 00007f80d658efc9 RDX: 0000000000000000 RSI: 0000200000000940 RDI: 0000000000000009 RBP: 00007f80d6611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f80d67e6038 R14: 00007f80d67e5fa0 R15: 00007ffcd1a79a98 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6650 Comm: syz.6.135 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:write_comp_data kernel/kcov.c:245 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x8/0x90 kernel/kcov.c:300 Code: 20 e9 cc fd 88 09 cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 14 25 08 20 6e 92 65 8b 0d 28 19 ae 10 81 e1 00 01 ff 00 RSP: 0018:ffffc90000006c28 EFLAGS: 00000046 RAX: ffffffff81ad6d15 RBX: ffff888030c29428 RCX: dffffc0000000000 RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000000260f R08: 0000000000000000 R09: ffffffff81adf605 R10: 000000000000000b R11: ffffffff81684ee0 R12: ffff888030c29440 R13: 0000000000004d31 R14: 1ffff11006185288 R15: 0000000000000000 FS: 00007fd7853796c0(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f84c7b156e8 CR3: 000000002edfe000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: hrtimer_forward+0x95/0x2b0 kernel/time/hrtimer.c:1045 hrtimer_forward_now include/linux/hrtimer.h:362 [inline] perf_swevent_hrtimer+0x406/0x500 kernel/events/core.c:11791 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x4e0/0xc60 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194 Code: 74 05 e8 db 0b 7f f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 d3 3a 47 f6 65 8b 05 dc 68 25 07 85 c0 74 40 48 c7 04 24 0e 36 RSP: 0018:ffffc90000007240 EFLAGS: 00000206 RAX: 76978f5a06452500 RBX: 0000000000000a02 RCX: 76978f5a06452500 RDX: 0000000000000002 RSI: ffffffff8d70be22 RDI: 0000000000000001 RBP: ffffc900000072d0 R08: ffffffff8f7cd277 R09: 1ffffffff1ef9a4e R10: dffffc0000000000 R11: fffffbfff1ef9a4f R12: dffffc0000000000 R13: 1ffff92000000e6c R14: ffffffff999aff00 R15: 1ffff92000000e48 debug_rcu_head_queue kernel/rcu/rcu.h:237 [inline] __call_rcu_common kernel/rcu/tree.c:3108 [inline] call_rcu+0xc3/0x9c0 kernel/rcu/tree.c:3243 refdst_drop include/net/dst.h:266 [inline] skb_dst_drop include/net/dst.h:278 [inline] __dev_queue_xmit+0x85c/0x3b50 net/core/dev.c:4718 dev_queue_xmit include/linux/netdevice.h:3365 [inline] neigh_hh_output include/net/neighbour.h:531 [inline] neigh_output include/net/neighbour.h:545 [inline] ip6_finish_output2+0xf70/0x1480 net/ipv6/ip6_output.c:136 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247 NF_HOOK include/linux/netfilter.h:318 [inline] ndisc_send_skb+0xbce/0x1510 net/ipv6/ndisc.c:512 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x70 kernel/kcov.c:217 Code: 5b e9 33 97 5a 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 20 6e 92 <65> 8b 15 28 1c ae 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 RSP: 0018:ffffc90003247378 EFLAGS: 00000203 RAX: ffffffff820b32be RBX: 0000000000000001 RCX: ffff88807c330000 RDX: ffff88807c330000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003247630 R08: ffffea0001df54b3 R09: 1ffffd40003bea96 R10: dffffc0000000000 R11: fffff940003bea97 R12: dffffc0000000000 R13: 00007fd783885000 R14: 0000000077d52000 R15: ffffc90003247840 zap_present_folio_ptes mm/memory.c:1653 [inline] zap_present_ptes mm/memory.c:1709 [inline] do_zap_pte_range mm/memory.c:1810 [inline] zap_pte_range mm/memory.c:1854 [inline] zap_pmd_range mm/memory.c:1946 [inline] zap_pud_range mm/memory.c:1975 [inline] zap_p4d_range mm/memory.c:1996 [inline] unmap_page_range+0x208e/0x4370 mm/memory.c:2017 unmap_single_vma mm/memory.c:2060 [inline] unmap_vmas+0x399/0x580 mm/memory.c:2104 exit_mmap+0x240/0xb40 mm/mmap.c:1280 __mmput+0x118/0x430 kernel/fork.c:1133 mmput kernel/fork.c:1156 [inline] dup_mm kernel/fork.c:1506 [inline] copy_mm+0x1f3/0x4b0 kernel/fork.c:1541 copy_process+0x1706/0x3c00 kernel/fork.c:2181 kernel_clone+0x21e/0x840 kernel/fork.c:2609 __do_sys_clone kernel/fork.c:2750 [inline] __se_sys_clone kernel/fork.c:2734 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd78458efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd785378fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fd7847e5fa0 RCX: 00007fd78458efc9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fd784611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd7847e6038 R14: 00007fd7847e5fa0 R15: 00007ffda81b39c8