BUG: soft lockup in mld_dad_timer

Kernel	Title	Count	Last	Reported	Patched	Status
linux-4.14	BUG: soft lockup in mld_dad_timer_expire (2)	1	868d	868d	0/1	auto-closed as invalid on 2022/04/06 03:57
linux-4.19	BUG: soft lockup in mld_dad_timer_expire (2)	1	628d	628d	0/1	auto-obsoleted due to no activity on 2022/12/01 09:34
linux-4.14	BUG: soft lockup in mld_dad_timer_expire	1	1017d	1017d	0/1	auto-closed as invalid on 2021/11/07 19:15

syz-executor.0 (9580) used greatest stack depth: 23392 bytes left watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:9603] Modules linked in: irq event stamp: 7342871 hardirqs last enabled at (7342870): [<ffffffff81982899>] kmem_cache_free+0x109/0x260 mm/slab.c:3766 hardirqs last disabled at (7342871): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3104): [<ffffffff86e9e8b9>] fib_table_delete+0x969/0x1030 net/ipv4/fib_trie.c:1610 softirqs last disabled at (3257): [<ffffffff813927d5>] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3257): [<ffffffff813927d5>] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 9603 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:kmem_cache_free+0x11c/0x260 mm/slab.c:3766 Code: 11 48 63 75 74 48 89 df e8 51 21 df 01 e9 68 ff ff ff e8 a7 80 cf ff 48 83 3d e7 59 59 08 00 0f 84 f8 00 00 00 4c 89 e7 57 9d <0f> 1f 44 00 00 eb 86 65 8b 05 76 58 69 7e 83 f8 07 0f 87 e7 00 00 RSP: 0018:ffff8880ba006cb8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff888040a2e080 RCX: 1ffff1101388b5df RDX: 0000000000000000 RSI: ffff88809c45afc8 RDI: 0000000000000286 RBP: ffff88823b33a540 R08: 0000000000400000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 R13: ffffffff866fedf1 R14: ffffffff8674b842 R15: 00000000000003e8 FS: 00007fb301e73700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559f943a5cc8 CR3: 00000000b3315000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> kfree_skbmem+0xc1/0x140 net/core/skbuff.c:595 __kfree_skb net/core/skbuff.c:655 [inline] kfree_skb+0x127/0x3d0 net/core/skbuff.c:672 enqueue_to_backlog+0x272/0xe00 net/core/dev.c:4263 netif_rx_internal+0xfd/0x670 net/core/dev.c:4491 loopback_xmit+0x2c7/0x710 drivers/net/loopback.c:95 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 __dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230 ip_do_fragment+0x104a/0x2620 net/ipv4/ip_output.c:816 ip_fragment.constprop.0+0x174/0x240 net/ipv4/ip_output.c:552 ip_finish_output+0xa35/0x10b0 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 iptunnel_xmit+0x63b/0x9d0 net/ipv4/ip_tunnel_core.c:91 geneve_xmit_skb drivers/net/geneve.c:867 [inline] geneve_xmit+0x120d/0x2e60 drivers/net/geneve.c:943 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 __dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip6_finish_output2+0xde7/0x2290 net/ipv6/ip6_output.c:120 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681 mld_send_initial_cr.part.0+0x106/0x150 net/ipv6/mcast.c:2098 mld_send_initial_cr net/ipv6/mcast.c:1196 [inline] mld_dad_timer_expire+0x183/0x5e0 net/ipv6/mcast.c:2117 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 </IRQ> RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:kfree+0x123/0x210 mm/slab.c:3823 Code: 89 ea 48 89 ee 4c 89 e7 e8 da ee ff ff f6 c7 02 74 ca e8 20 74 cf ff 48 83 3d 60 4d 59 08 00 0f 84 eb 00 00 00 48 89 df 57 9d <0f> 1f 44 00 00 5b 5d 41 5c 41 5d c3 65 8b 05 ea 4b 69 7e 83 f8 07 RSP: 0018:ffff8880504f6590 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000286 RCX: 1ffff1101388b5da RDX: 0000000000000000 RSI: ffff88809c45aeb0 RDI: 0000000000000286 RBP: ffff8880957e2340 R08: 0000000000400000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88813bff0940 R13: ffffffff8670bf6e R14: 0000000000000000 R15: ffff8880957e2430 skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x6de/0x920 net/core/skbuff.c:583 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb net/core/skbuff.c:654 [inline] consume_skb+0x113/0x3d0 net/core/skbuff.c:714 netlink_broadcast_filtered+0x31f/0xbc0 net/netlink/af_netlink.c:1527 netlink_broadcast net/netlink/af_netlink.c:1549 [inline] nlmsg_multicast include/net/netlink.h:591 [inline] nlmsg_notify+0x15e/0x1f0 net/netlink/af_netlink.c:2506 rtmsg_fib+0x37e/0x4e0 net/ipv4/fib_semantics.c:428 fib_table_delete+0x7a8/0x1030 net/ipv4/fib_trie.c:1599 fib_magic+0x361/0x540 net/ipv4/fib_frontend.c:894 fib_del_ifaddr+0xd36/0xfd0 net/ipv4/fib_frontend.c:1094 fib_inetaddr_event+0xb4/0x2a0 net/ipv4/fib_frontend.c:1234 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 __blocking_notifier_call_chain kernel/notifier.c:317 [inline] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] blocking_notifier_call_chain kernel/notifier.c:328 [inline] blocking_notifier_call_chain+0x85/0xa0 kernel/notifier.c:325 __inet_del_ifa+0x534/0xba0 net/ipv4/devinet.c:416 inet_del_ifa net/ipv4/devinet.c:446 [inline] inetdev_destroy net/ipv4/devinet.c:311 [inline] inetdev_event+0x5cb/0x1270 net/ipv4/devinet.c:1545 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 call_netdevice_notifiers_mtu net/core/dev.c:1785 [inline] dev_set_mtu_ext+0x384/0x580 net/core/dev.c:7819 do_setlink+0x484/0x3540 net/core/rtnetlink.c:2412 rtnl_group_changelink net/core/rtnetlink.c:2925 [inline] rtnl_newlink+0xbc9/0x15c0 net/core/rtnetlink.c:3083 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb3034fe059 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb301e73168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fb303610f60 RCX: 00007fb3034fe059 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fb30355808d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4b8ea18f R14: 00007fb301e73300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess): 0: 11 48 63 adc %ecx,0x63(%rax) 3: 75 74 jne 0x79 5: 48 89 df mov %rbx,%rdi 8: e8 51 21 df 01 callq 0x1df215e d: e9 68 ff ff ff jmpq 0xffffff7a 12: e8 a7 80 cf ff callq 0xffcf80be 17: 48 83 3d e7 59 59 08 cmpq $0x0,0x85959e7(%rip) # 0x8595a06 1e: 00 1f: 0f 84 f8 00 00 00 je 0x11d 25: 4c 89 e7 mov %r12,%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: eb 86 jmp 0xffffffb7 31: 65 8b 05 76 58 69 7e mov %gs:0x7e695876(%rip),%eax # 0x7e6958ae 38: 83 f8 07 cmp $0x7,%eax 3b: 0f .byte 0xf 3c: 87 e7 xchg %esp,%edi