IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
qtaguid: iface_stat: iface_check_stats_reset_and_adjust(lo): iface reset its stats unexpectedly
IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
skbuff: skb_over_panic: text:ffffffff827235b8 len:56 put:8 head:ffff8801c9575680 data:ffff8801c9575710 tail:0xc8 end:0xc0 dev:ip6tnl1
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:105!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6135 Comm: syz-executor.0 Not tainted 4.9.141+ #1
task: ffff8801886daf80 task.stack: ffff880191230000
RIP: 0010:[<ffffffff827f8512>]  [<ffffffff827f8512>] skb_panic+0x166/0x168 net/core/skbuff.c:105
RSP: 0018:ffff8801db607968  EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff88019c3cb780 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81226ef2 RDI: ffff8801886db82c
RBP: ffff8801db6079d0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8801cc5b6600
R13: ffff8801c9575710 R14: 00000000000000c8 R15: 00000000000000c0
FS:  0000000001f82940(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc87f3b4000 CR3: 00000001c8e5c000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8801c9575710 00000000000000c8 00000000000000c0 ffff8801cc5b6600
 ffffffff822c8b4b ffffffff82c6fe40 ffffffff827235b8 00000008db607aa0
 ffff88019c3cb780 ffffffff827235b8 0000000000000008 00000000000000c8
Call Trace:
 [<ffffffff827f855a>] skb_over_panic net/core/skbuff.c:110 [inline]
 [<ffffffff827f855a>] skb_put.cold.21+0x23/0x23 net/core/skbuff.c:1439
 [<ffffffff827235b8>] mld_newpack+0x4d8/0x7b0 net/ipv6/mcast.c:1607
 [<ffffffff82723b2c>] add_grhead.isra.14+0x29c/0x370 net/ipv6/mcast.c:1690
 [<ffffffff827242ab>] add_grec+0x6ab/0xf20 net/ipv6/mcast.c:1821
 [<ffffffff82725240>] mld_send_cr net/ipv6/mcast.c:1947 [inline]
 [<ffffffff82725240>] mld_ifc_timer_expire+0x340/0x7b0 net/ipv6/mcast.c:2455
 [<ffffffff81262a43>] call_timer_fn+0x163/0x6e0 kernel/time/timer.c:1319
 [<ffffffff812631f4>] expire_timers+0x234/0x580 kernel/time/timer.c:1359
 [<ffffffff81263748>] __run_timers kernel/time/timer.c:1674 [inline]
 [<ffffffff81263748>] run_timer_softirq+0x208/0x5e0 kernel/time/timer.c:1687
 [<ffffffff8281cb9e>] __do_softirq+0x20e/0x964 kernel/softirq.c:288
 [<ffffffff810efdbc>] invoke_softirq kernel/softirq.c:368 [inline]
 [<ffffffff810efdbc>] irq_exit+0x11c/0x150 kernel/softirq.c:409
 [<ffffffff8281b771>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff8281b771>] smp_apic_timer_interrupt+0x81/0xb0 arch/x86/kernel/apic/apic.c:962
 [<ffffffff8281902d>] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  920.294057]  [<ffffffff82816ffe>] ? arch_local_irq_enable arch/x86/include/asm/paravirt.h:778 [inline]
 <EOI> [  920.294057]  [<ffffffff82816ffe>] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:170 [inline]
 <EOI> [  920.294057]  [<ffffffff82816ffe>] ? _raw_spin_unlock_irq+0x2e/0x50 kernel/locking/spinlock.c:199
 [<ffffffff81166f79>] finish_lock_switch kernel/sched/sched.h:1214 [inline]
 [<ffffffff81166f79>] finish_task_switch+0x1e9/0x640 kernel/sched/core.c:2821
 [<ffffffff828075ca>] context_switch kernel/sched/core.c:2954 [inline]
 [<ffffffff828075ca>] __schedule+0x66a/0x1b10 kernel/sched/core.c:3498
 [<ffffffff828094fb>] preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:3711
 [<ffffffff82818214>] retint_kernel+0x1b/0x2d
 [<ffffffff823fbacf>] local_bh_enable include/linux/bottom_half.h:31 [inline]
 [<ffffffff823fbacf>] get_next_corpse net/netfilter/nf_conntrack_core.c:1565 [inline]
 [<ffffffff823fbacf>] nf_ct_iterate_cleanup+0x25f/0x480 net/netfilter/nf_conntrack_core.c:1621
 [<ffffffff8260a028>] masq_device_event+0xa8/0xd0 net/ipv4/netfilter/nf_nat_masquerade_ipv4.c:100
 [<ffffffff811478d4>] notifier_call_chain+0xb4/0x1d0 kernel/notifier.c:93
 [<ffffffff81147a5d>] __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 [<ffffffff81147a5d>] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 [<ffffffff822f4a45>] call_netdevice_notifiers_info+0x55/0x70 net/core/dev.c:1647
 [<ffffffff822f5764>] call_netdevice_notifiers net/core/dev.c:1663 [inline]
 [<ffffffff822f5764>] dev_close_many+0x2e4/0x6a0 net/core/dev.c:1456
 [<ffffffff823031ac>] rollback_registered_many+0x3ac/0xb50 net/core/dev.c:6838
 [<ffffffff82303a3e>] rollback_registered+0xee/0x1b0 net/core/dev.c:6901
 [<ffffffff8230d5fa>] unregister_netdevice_queue+0x1aa/0x230 net/core/dev.c:7888
 [<ffffffff81ed1e91>] unregister_netdevice include/linux/netdevice.h:2465 [inline]
 [<ffffffff81ed1e91>] __tun_detach+0x821/0xa00 drivers/net/tun.c:575
 [<ffffffff81ed20b4>] tun_detach drivers/net/tun.c:585 [inline]
 [<ffffffff81ed20b4>] tun_chr_close+0x44/0x60 drivers/net/tun.c:2392
 [<ffffffff81510293>] __fput+0x263/0x700 fs/file_table.c:208
 [<ffffffff815107b5>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8113dc4c>] task_work_run+0x10c/0x180 kernel/task_work.c:116
 [<ffffffff81003e49>] tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 [<ffffffff81003e49>] exit_to_usermode_loop+0x129/0x150 arch/x86/entry/common.c:162
 [<ffffffff81005932>] prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 [<ffffffff81005932>] syscall_return_slowpath arch/x86/entry/common.c:263 [inline]
 [<ffffffff81005932>] do_syscall_64+0x3e2/0x550 arch/x86/entry/common.c:290
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 55 ab cf fe 4c 8b 4d b8 8b 4b 78 41 54 48 c7 c7 60 fa c6 82 44 8b 45 d4 41 57 48 8b 55 c8 41 56 48 8b 75 c0 41 55 e8 de a9 c0 fe <0f> 0b e8 47 35 b2 fe 4c 8b 65 08 e8 4e 92 cf fe 48 c7 c1 00 fe 
RIP  [<ffffffff827f8512>] skb_panic+0x166/0x168 net/core/skbuff.c:101
 RSP <ffff8801db607968>
---[ end trace 6a95191ca19efd09 ]---