IPv6: ADDRCONF(NETDEV_CHANGE): ÿ: link becomes ready
ip6_tunnel: 1 xmit: Local address not yet configured!
ip6_tunnel:  xmit: Local address not yet configured!
skbuff: skb_over_panic: text:000000006b2b1eae len:56 put:8 head:0000000056fd6768 data:00000000ffc100da tail:0xc8 end:0xc0 dev:ip6tnl0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 1 PID: 19204 Comm: kworker/u4:13 Not tainted 4.14.156-syzkaller #0
Workqueue: netns cleanup_net
task: 00000000b3d84ad7 task.stack: 000000001fb269f3
RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104
RSP: 0018:ffff8881dbb079d8 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff88816dcc2b40 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8881a57d8920 RDI: ffffed103b760f2d
RBP: ffffffff83a8a0a0 R08: 0000000000000085 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8318600e
R13: 0000000000000008 R14: ffff8881c43b6600 R15: 00000000000000c0
FS:  0000000000000000(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000201e6000 CR3: 000000004ec26001 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put.cold+0x24/0x24 net/core/skbuff.c:1699
 mld_newpack+0x4ce/0x7a0 net/ipv6/mcast.c:1608
 add_grhead.isra.0+0x29c/0x370 net/ipv6/mcast.c:1691
 add_grec+0x6a3/0xf10 net/ipv6/mcast.c:1822
 mld_send_cr net/ipv6/mcast.c:1948 [inline]
 mld_ifc_timer_expire+0x340/0x7e0 net/ipv6/mcast.c:2455
 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279
 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318
 __run_timers kernel/time/timer.c:1636 [inline]
 run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1649
 __do_softirq+0x234/0x9ec kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x114/0x150 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:lock_acquire+0x170/0x360 kernel/locking/lockdep.c:3997
RSP: 0018:ffff8881a56bfb50 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000007 RBX: ffff8881a57d8000 RCX: 1ffff11034afb119
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000246
RBP: ffffffff83ed52a0 R08: 0000000000000000 R09: 0000000000000003
R10: ffff8881a57d88a8 R11: 2a6a96e7dbc1f206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
 rcu_read_lock include/linux/rcupdate.h:629 [inline]
 inet_twsk_purge+0xc3/0x510 net/ipv4/inet_timewait_sock.c:269
 ops_exit_list.isra.0+0xfd/0x150 net/core/net_namespace.c:145
 cleanup_net+0x3ce/0x870 net/core/net_namespace.c:484
 process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134
 worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271
 kthread+0x31f/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404
Code: 20 ff 4c 8b 4c 24 10 8b 4b 78 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 9a a8 83 ff 74 24 10 ff 74 24 20 e8 49 a3 ee fe <0f> 0b e8 e7 7d fd fe 4c 8b 64 24 18 e8 bd 43 20 ff 48 c7 c1 60 
RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff8881dbb079d8
---[ end trace 6b8902379cc30fa0 ]---