IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
device veth1_macvtap entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
skbuff: skb_over_panic: text:ffffffff863d0e5f len:40 put:40 head:ffff8880b5576840 data:ffff8880b55768f0 tail:0xd8 end:0xc0 dev:ip6tnl0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 8449 Comm: kworker/0:3 Not tainted 4.14.289-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Workqueue: ipv6_addrconf addrconf_dad_work
task: ffff88808f8e0380 task.stack: ffff88808f8e8000
RIP: 0010:skb_panic+0x172/0x174 net/core/skbuff.c:104
RSP: 0018:ffff88808f8ef8d0 EFLAGS: 00010282
RAX: 0000000000000086 RBX: ffff88809f077640 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff878bc880 RDI: ffffed1011f1df10
RBP: ffffffff8855af20 R08: 0000000000000086 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff863d0e5f
R13: 0000000000000028 R14: ffff8880a9a64080 R15: 00000000000000c0
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a38611070 CR3: 0000000008e6a000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put.cold+0x24/0x24 net/core/skbuff.c:1709
 ip6_mc_hdr.constprop.0+0x11f/0x580 net/ipv6/mcast.c:1552
 mld_newpack+0x39c/0x710 net/ipv6/mcast.c:1600
 add_grhead+0x265/0x330 net/ipv6/mcast.c:1688
 add_grec+0xc40/0xed0 net/ipv6/mcast.c:1819
 mld_send_initial_cr.part.0+0xb0/0x140 net/ipv6/mcast.c:2069
 mld_send_initial_cr net/ipv6/mcast.c:1170 [inline]
 ipv6_mc_dad_complete+0x183/0x5a0 net/ipv6/mcast.c:2081
 addrconf_dad_completed+0x80f/0xa90 net/ipv6/addrconf.c:4069
 addrconf_dad_begin net/ipv6/addrconf.c:3856 [inline]
 addrconf_dad_work+0x673/0xef0 net/ipv6/addrconf.c:3958
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 8b 4c 24 10 8b 8b 80 00 00 00 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 a7 55 88 ff 74 24 10 ff 74 24 20 e8 fe 64 e4 ff <0f> 0b e8 32 49 37 fa 4c 8b 64 24 18 e8 68 eb 60 fa 48 c7 c1 e0 
RIP: skb_panic+0x172/0x174 net/core/skbuff.c:104 RSP: ffff88808f8ef8d0
---[ end trace 6a6abb3c22107e66 ]---