skbuff: skb_over_panic: text:ffffffff834ae8b5 len:56 put:8 head:ffff8800b9826500 data:ffff8800b9826590 tail:0xc8 end:0xc0 dev:ip6tnl0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 1673 Comm: kworker/0:2 Not tainted 4.4.141-g9664bde #75
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
task: ffff8801d4519800 task.stack: ffff8801d4398000
RIP: 0010:[<ffffffff8389655c>]  [<ffffffff8389655c>] skb_panic+0x166/0x168 net/core/skbuff.c:100
RSP: 0018:ffff8801d439f760  EFLAGS: 00010282
RAX: 0000000000000085 RBX: ffff8801cd11eb40 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8125d2b9 RDI: ffff8801d451a0dc
RBP: ffff8801d439f7c8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8801bd15e600
R13: ffff8800b9826590 R14: 00000000000000c8 R15: 00000000000000c0
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb0fafbc7d0 CR3: 00000000ba068000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800b9826590 00000000000000c8 00000000000000c0 ffff8801bd15e600
 ffffffff83475263 ffffffff83ec5a60 ffffffff834ae8b5 0000000841b58ab3
 ffff8801cd11eb40 ffffffff834ae8b5 ffff8800b98265c0 0000000000000008
Call Trace:
 [<ffffffff838965a4>] skb_over_panic net/core/skbuff.c:109 [inline]
 [<ffffffff838965a4>] skb_put.cold.72+0x23/0x23 net/core/skbuff.c:1362
 [<ffffffff834ae8b5>] mld_newpack+0x8b5/0xc80 net/ipv6/mcast.c:1594
 [<ffffffff834aef19>] add_grhead.isra.32+0x299/0x370 net/ipv6/mcast.c:1677
 [<ffffffff834b24e6>] add_grec+0xbc6/0xe00 net/ipv6/mcast.c:1798
 [<ffffffff834b2a7d>] mld_send_initial_cr.part.33+0xbd/0x150 net/ipv6/mcast.c:2049
 [<ffffffff834bdbc3>] mld_send_initial_cr net/ipv6/mcast.c:2066 [inline]
 [<ffffffff834bdbc3>] ipv6_mc_dad_complete+0x103/0x130 net/ipv6/mcast.c:2061
 [<ffffffff83450513>] addrconf_dad_completed+0x443/0x880 net/ipv6/addrconf.c:3775
 [<ffffffff83452923>] addrconf_dad_begin net/ipv6/addrconf.c:3594 [inline]
 [<ffffffff83452923>] addrconf_dad_work+0x743/0xa80 net/ipv6/addrconf.c:3675
 [<ffffffff81181f8f>] process_one_work+0x7df/0x1600 kernel/workqueue.c:2064
 [<ffffffff81182e89>] worker_thread+0xd9/0xfc0 kernel/workqueue.c:2196
 [<ffffffff81190998>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff838c3155>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: 2b 33 c6 fd 4c 8b 4d b8 8b 4b 78 41 54 48 c7 c7 a0 55 ec 83 44 8b 45 d4 41 57 48 8b 55 c8 41 56 48 8b 75 c0 41 55 e8 8d ed b7 fd <0f> 0b e8 bd af ab fd 4c 8b 65 08 e8 d4 1c c6 fd 48 c7 c1 20 5a 
RIP  [<ffffffff8389655c>] skb_panic+0x166/0x168 net/core/skbuff.c:100
 RSP <ffff8801d439f760>
---[ end trace b1a29f00b3d6e5fd ]---