skbuff: skb_under_panic: text:ffffffff89d8d157 len:-1826829812 put:-1826829868 head:ffff888112701c00 data:ffff88807f53526c tail:0x78 end:0x180 dev:bond19
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:212!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6650 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:skb_panic+0x157/0x160
Code: c7 e0 b7 6c 8c 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 55 41 57 41 56 e8 fe 97 f5 ff 48 83 c4 20 90 <0f> 0b cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90005877318 EFLAGS: 00010286
RAX: 0000000000000099 RBX: dffffc0000000000 RCX: aa5f1fc7609d5a00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000180 R08: ffffc90005877027 R09: 1ffff92000b0ee04
R10: dffffc0000000000 R11: fffff52000b0ee05 R12: ffff888111113210
R13: ffff888112701c00 R14: ffff88807f53526c R15: 0000000000000078
FS:  0000000000000000(0000) GS:ffff88818eb3e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25872bbfb8 CR3: 000000011c2ac000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 skb_push+0xc3/0xe0
 ipgre_header+0x67/0x290
 neigh_connected_output+0x286/0x460
 ip6_finish_output2+0xfb3/0x1480
 ip6_output+0x340/0x550
 ndisc_send_skb+0xbce/0x1510
 addrconf_dad_completed+0x7ae/0xd60
 addrconf_dad_work+0xc36/0x14b0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_panic+0x157/0x160
Code: c7 e0 b7 6c 8c 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 55 41 57 41 56 e8 fe 97 f5 ff 48 83 c4 20 90 <0f> 0b cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90005877318 EFLAGS: 00010286
RAX: 0000000000000099 RBX: dffffc0000000000 RCX: aa5f1fc7609d5a00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000180 R08: ffffc90005877027 R09: 1ffff92000b0ee04
R10: dffffc0000000000 R11: fffff52000b0ee05 R12: ffff888111113210
R13: ffff888112701c00 R14: ffff88807f53526c R15: 0000000000000078
FS:  0000000000000000(0000) GS:ffff88818eb3e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a81266b000 CR3: 000000010e9a0000 CR4: 00000000000006f0
