skbuff: skb_under_panic: text:ffffffff8a21efe8 len:-1780234708 put:-1780234764 head:ffff8880616cc9c0 data:ffff887fcb89040c tail:0x78 end:0x180 dev:bond0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:211!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 7762 Comm: kworker/u32:38 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:211
Code: b6 04 01 84 c0 74 04 3c 03 7e 21 41 56 8b 4b 70 45 89 e8 48 c7 c7 a0 c6 e4 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 6a e1 33 f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 74 93 bb f8 4c
RSP: 0018:ffffc90003367600 EFLAGS: 00010282
RAX: 0000000000000098 RBX: ffff88805f831b80 RCX: ffffffff819a4e09
RDX: 0000000000000000 RSI: ffffffff819acca6 RDI: 0000000000000005
RBP: ffffffff8ce4da60 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8a21efe8
R13: 0000000095e3c5f4 R14: ffff8880398c8120 R15: 0000000000000180
FS:  0000000000000000(0000) GS:ffff8880d67b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555581a41808 CR3: 000000010b5e5000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 skb_under_panic net/core/skbuff.c:221 [inline]
 skb_push+0xca/0xf0 net/core/skbuff.c:2601
 ipgre_header+0x68/0x530 net/ipv4/ip_gre.c:895
 dev_hard_header include/linux/netdevice.h:3415 [inline]
 neigh_connected_output+0x363/0x620 net/core/neighbour.c:1619
 neigh_output include/net/neighbour.h:547 [inline]
 ip6_finish_output2+0xaee/0x2020 net/ipv6/ip6_output.c:141
 __ip6_finish_output+0x3cd/0x1010 net/ipv6/ip6_output.c:215
 ip6_finish_output net/ipv6/ip6_output.c:226 [inline]
 NF_HOOK_COND include/linux/netfilter.h:307 [inline]
 ip6_output+0x1ca/0x3e0 net/ipv6/ip6_output.c:248
 dst_output include/net/dst.h:461 [inline]
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ndisc_send_skb+0xa66/0x1e30 net/ipv6/ndisc.c:512
 ndisc_send_rs+0x129/0x670 net/ipv6/ndisc.c:722
 addrconf_dad_completed+0x49d/0x10d0 net/ipv6/addrconf.c:4360
 addrconf_dad_begin net/ipv6/addrconf.c:4122 [inline]
 addrconf_dad_work+0xcfb/0x14e0 net/ipv6/addrconf.c:4227
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:211
Code: b6 04 01 84 c0 74 04 3c 03 7e 21 41 56 8b 4b 70 45 89 e8 48 c7 c7 a0 c6 e4 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 6a e1 33 f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 74 93 bb f8 4c
RSP: 0018:ffffc90003367600 EFLAGS: 00010282
RAX: 0000000000000098 RBX: ffff88805f831b80 RCX: ffffffff819a4e09
RDX: 0000000000000000 RSI: ffffffff819acca6 RDI: 0000000000000005
RBP: ffffffff8ce4da60 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8a21efe8
R13: 0000000095e3c5f4 R14: ffff8880398c8120 R15: 0000000000000180
FS:  0000000000000000(0000) GS:ffff8880d67b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555581a41808 CR3: 0000000026708000 CR4: 0000000000352ef0