------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:2306!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 5822 Comm: kworker/u8:2 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:pskb_expand_head+0x12da/0x1320
Code: f8 e9 81 f3 ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e0 f3 ff ff 4c 89 ff e8 c1 bb ba f8 e9 d3 f3 ff ff e8 97 96 50 f8 90 <0f> 0b e8 8f 96 50 f8 90 0f 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f
RSP: 0018:ffffc9000611f4f0 EFLAGS: 00010293
RAX: ffffffff8974f6b9 RBX: ffff88802439de00 RCX: ffff88816fe58000
RDX: 0000000000000000 RSI: 0000000093ca5ac0 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000048
R10: dffffc0000000000 R11: ffffffff8a32d240 R12: dffffc0000000000
R13: 0000000000000820 R14: 0000000093ca5ac0 R15: 0000000000000180
FS:  0000000000000000(0000) GS:ffff88818de67000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560980832000 CR3: 0000000117202000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ipgre_header+0xd5/0x350
 neigh_connected_output+0x286/0x460
 ip6_output+0x340/0x550
 ndisc_send_skb+0xbaa/0x14e0
 ndisc_send_ns+0xd7/0x160
 addrconf_dad_work+0xac4/0x14c0
 process_scheduled_works+0xb02/0x1830
 worker_thread+0xa50/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pskb_expand_head+0x12da/0x1320
Code: f8 e9 81 f3 ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e0 f3 ff ff 4c 89 ff e8 c1 bb ba f8 e9 d3 f3 ff ff e8 97 96 50 f8 90 <0f> 0b e8 8f 96 50 f8 90 0f 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f
RSP: 0018:ffffc9000611f4f0 EFLAGS: 00010293
RAX: ffffffff8974f6b9 RBX: ffff88802439de00 RCX: ffff88816fe58000
RDX: 0000000000000000 RSI: 0000000093ca5ac0 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000048
R10: dffffc0000000000 R11: ffffffff8a32d240 R12: dffffc0000000000
R13: 0000000000000820 R14: 0000000093ca5ac0 R15: 0000000000000180
FS:  0000000000000000(0000) GS:ffff88818de67000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555570ea9a28 CR3: 00000000121ca000 CR4: 00000000000006f0
