watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.3.26:6018] Modules linked in: irq event stamp: 13731651 hardirqs last enabled at (13731650): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (13731651): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (13692542): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (13692542): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (13692542): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (13692545): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (13692545): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (13692545): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 6018 Comm: syz.3.26 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 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 43 78 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 40 91 92 <65> 8b 15 28 fc d0 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 RSP: 0018:ffffc90000006000 EFLAGS: 00000246 RAX: ffffffff8505f766 RBX: 0000000000000820 RCX: ffff888030c53c80 RDX: ffff888030c53c80 RSI: 0000000000000002 RDI: 0000000000000001 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffff88807e09c000 R10: ffffc90000005d08 R11: fffff52000000ba3 R12: ffff888140ac6848 R13: ffff888140ac6800 R14: 0000000000000002 R15: 0000000000000000 FS: 00007fc01b4206c0(0000) GS:ffff888125d0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc01b3fef98 CR3: 000000007e12a000 CR4: 00000000003526f0 Call Trace: virtqueue_use_indirect drivers/virtio/virtio_ring.c:241 [inline] virtqueue_add_split drivers/virtio/virtio_ring.c:567 [inline] virtqueue_add+0x3d6/0x41b0 drivers/virtio/virtio_ring.c:2281 virtqueue_add_outbuf+0xa3/0xf0 drivers/virtio/virtio_ring.c:2342 virtnet_add_outbuf drivers/net/virtio_net.c:574 [inline] xmit_skb drivers/net/virtio_net.c:3343 [inline] start_xmit+0x123e/0x2b80 drivers/net/virtio_net.c:3367 __netdev_start_xmit include/linux/netdevice.h:5248 [inline] netdev_start_xmit include/linux/netdevice.h:5257 [inline] xmit_one net/core/dev.c:3845 [inline] dev_hard_start_xmit+0x2d7/0x830 net/core/dev.c:3861 sch_direct_xmit+0x241/0x4b0 net/sched/sch_generic.c:344 __dev_xmit_skb net/core/dev.c:4152 [inline] __dev_queue_xmit+0x1857/0x3b50 net/core/dev.c:4729 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] ip_finish_output2+0xd03/0x1160 net/ipv4/ip_output.c:237 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip_output+0x29f/0x450 net/ipv4/ip_output.c:438 ip_local_out net/ipv4/ip_output.c:131 [inline] __ip_queue_xmit+0x118d/0x1c30 net/ipv4/ip_output.c:534 __tcp_transmit_skb+0x24f6/0x3aa0 net/ipv4/tcp_output.c:1628 tcp_rcv_established+0x1961/0x2670 net/ipv4/tcp_input.c:6402 tcp_v4_do_rcv+0xa23/0xce0 net/ipv4/tcp_ipv4.c:1931 tcp_v4_rcv+0x252a/0x2dc0 net/ipv4/tcp_ipv4.c:2374 ip_protocol_deliver_rcu+0x221/0x440 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:239 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 dst_input include/net/dst.h:474 [inline] ip_sublist_rcv_finish+0x221/0x2a0 net/ipv4/ip_input.c:584 ip_list_rcv_finish net/ipv4/ip_input.c:636 [inline] ip_sublist_rcv+0x74c/0xa10 net/ipv4/ip_input.c:644 ip_list_rcv+0x3e2/0x430 net/ipv4/ip_input.c:678 __netif_receive_skb_list_ptype net/core/dev.c:6122 [inline] __netif_receive_skb_list_core+0x7d2/0x800 net/core/dev.c:6169 __netif_receive_skb_list net/core/dev.c:6221 [inline] netif_receive_skb_list_internal+0x96f/0xcb0 net/core/dev.c:6312 gro_normal_list include/net/gro.h:524 [inline] gro_normal_one include/net/gro.h:544 [inline] gro_skb_finish net/core/gro.c:603 [inline] gro_receive_skb+0x642/0xce0 net/core/gro.c:633 receive_buf+0xa0e/0x15e0 drivers/net/virtio_net.c:2643 virtnet_receive_packets drivers/net/virtio_net.c:2991 [inline] virtnet_receive drivers/net/virtio_net.c:3015 [inline] virtnet_poll+0x1fbc/0x2d80 drivers/net/virtio_net.c:3109 __napi_poll+0xc7/0x360 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784 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:fd_install+0x174/0x540 fs/file.c:673 Code: 03 00 00 41 80 3c 24 01 0f 84 07 02 00 00 49 83 c7 58 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 bf a6 e6 ff 49 8b 1f 97 c4 0c 09 41 89 c4 31 ff 89 c6 e8 eb 03 81 ff 45 85 e4 74 21 RSP: 0018:ffffc9000b1f7cc0 EFLAGS: 00000246 RAX: 1ffff11006443f8b RBX: ffff888077df1580 RCX: ffff888030c53c80 RDX: 0000000000000000 RSI: ffffffff8bc07740 RDI: ffffffff8bc07700 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff823f4357 R10: ffffc9000b1f7888 R11: fffff5200163ef13 R12: ffff88803221fc04 R13: 000000000000000a R14: ffffffff823f4357 R15: ffff88803221fc58 __do_sys_perf_event_open kernel/events/core.c:13755 [inline] __se_sys_perf_event_open+0x1acd/0x1d70 kernel/events/core.c:13377 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: 0033:0x7fc01a58eec9 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:00007fc01b420038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fc01a7e5fa0 RCX: 00007fc01a58eec9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0 RBP: 00007fc01a611f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc01a7e6038 R14: 00007fc01a7e5fa0 R15: 00007fff7b6e8ff8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6015 Comm: syz.4.24 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:lock_acquire+0xb/0x360 kernel/locking/lockdep.c:5828 Code: 95 c0 e9 08 53 b1 09 cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 <41> 54 53 48 83 ec 60 4d 89 ce 45 89 c7 41 89 cc 89 54 24 04 89 f3 RSP: 0018:ffffc90000a07890 EFLAGS: 00000046 RAX: ffffffff81ae349b RBX: ffffffff99a0c3c8 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff99a0c3c8 RBP: ffffc90000a07978 R08: 0000000000000001 R09: 0000000000000000 R10: 000000000000000b R11: 0000000000010100 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffffff81ae3605 R15: 1ffff92000140f18 FS: 00007f6d8ac8e6c0(0000) GS:ffff888125e0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbfda3b6358 CR3: 000000007af78000 CR4: 00000000003526f0 Call Trace: seqcount_lockdep_reader_access+0xcf/0x1c0 include/linux/seqlock.h:72 ktime_get+0x45/0x200 kernel/time/timekeeping.c:824 hrtimer_forward_now include/linux/hrtimer.h:362 [inline] perf_swevent_hrtimer+0x3f8/0x500 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:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5872 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 fb ac f3 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000a07f78 EFLAGS: 00000206 RAX: 6ab9ce588a0f6900 RBX: 0000000000000000 RCX: 6ab9ce588a0f6900 RDX: 0000000000000000 RSI: ffffffff8d9d15ee RDI: ffffffff8bc07760 RBP: ffffffff8173cd25 R08: 0000000000000000 R09: ffffffff8173cd25 R10: ffffc90000a07c48 R11: ffffffff81ac6cd0 R12: 0000000000000002 R13: ffffffff8e13d2e0 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4955 [inline] slab_alloc_node mm/slub.c:5265 [inline] kmem_cache_alloc_node_noprof+0x433/0x710 mm/slub.c:5317 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 alloc_skb include/linux/skbuff.h:1383 [inline] nlmsg_new include/net/netlink.h:1055 [inline] __neigh_notify+0x15c/0x310 net/core/neighbour.c:3544 neigh_cleanup_and_release+0xb0/0x290 net/core/neighbour.c:120 neigh_remove_one+0x46d/0x4c0 net/core/neighbour.c:250 neigh_forced_gc net/core/neighbour.c:281 [inline] neigh_alloc net/core/neighbour.c:513 [inline] ___neigh_create+0x485/0x2260 net/core/neighbour.c:656 ip6_finish_output2+0x1175/0x1480 net/ipv6/ip6_output.c:128 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:queue_work_on+0x1f7/0x270 kernel/workqueue.c:2397 Code: 4d 85 ff 75 16 e8 89 22 36 00 eb 15 e8 82 22 36 00 e8 9d e0 c1 09 4d 85 ff 74 ea e8 73 22 36 00 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2e 00 00 00 00 66 43 c7 44 2e 09 00 00 43 c6 44 2e 0b 00 RSP: 0018:ffffc9000b156ee0 EFLAGS: 00000283 RAX: ffffffff818a217d RBX: ffff88807aa68001 RCX: 0000000000080000 RDX: ffffc9000c7f4000 RSI: 00000000000091b2 RDI: 00000000000091b3 RBP: ffffc9000b156fd0 R08: ffffffff8f9e1077 R09: 1ffffffff1f3c20e R10: dffffc0000000000 R11: fffffbfff1f3c20f R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff9200162ade4 R15: 0000000000000200 queue_work include/linux/workqueue.h:669 [inline] schedule_work include/linux/workqueue.h:730 [inline] __rhashtable_remove_fast_one include/linux/rhashtable.h:1069 [inline] __rhashtable_remove_fast include/linux/rhashtable.h:1093 [inline] rhltable_remove include/linux/rhashtable.h:1144 [inline] nft_chain_del+0xef4/0xf90 net/netfilter/nf_tables_api.c:10441 __nf_tables_abort net/netfilter/nf_tables_api.c:11319 [inline] nf_tables_abort+0x47db/0x8640 net/netfilter/nf_tables_api.c:11476 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:595 [inline] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:649 [inline] nfnetlink_rcv+0x1d18/0x2590 net/netfilter/nfnetlink.c:667 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: 0033:0x7f6d89d8eec9 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:00007f6d8ac8e038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6d89fe5fa0 RCX: 00007f6d89d8eec9 RDX: 000000002002c802 RSI: 000020000000c2c0 RDI: 0000000000000008 RBP: 00007f6d89e11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6d89fe6038 R14: 00007f6d89fe5fa0 R15: 00007fff3c79d658