skbuff: skb_over_panic: text:ffffffff83d4ea3f len:76 put:20 head:ffff8881da6e1c00 data:ffff8881da6e1c40 tail:0x8c end:0x80 dev:syztnl2
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:109!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3680 Comm: kworker/0:8 Not tainted 5.4.225-syzkaller-00029-g6a5ec6cea0cd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:skb_panic+0x14a/0x150 net/core/skbuff.c:105
Code: 14 2f 85 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 49 89 e9 31 c0 53 41 55 41 54 41 57 e8 61 a3 d0 00 48 83 c4 20 <0f> 0b 0f 1f 40 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 68 4d 89
RSP: 0018:ffff8881ef12f908 EFLAGS: 00010282
RAX: 0000000000000086 RBX: ffff8881f28ce000 RCX: ef12cf2ae091aa00
RDX: 0000000000000000 RSI: 0000000000000402 RDI: 0000000000000000
RBP: ffff8881da6e1c00 R08: ffffffff814e6f67 R09: ffffed103edcaa08
R10: ffffed103edcaa08 R11: 1ffff1103edcaa07 R12: 000000000000008c
R13: 0000000000000080 R14: dffffc0000000000 R15: ffff8881da6e1c40
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95d37d1718 CR3: 00000001ac3b8000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_over_panic net/core/skbuff.c:114 [inline]
 skb_put+0x148/0x1f0 net/core/skbuff.c:1885
 add_grhead net/ipv6/mcast.c:1714 [inline]
 add_grec+0xe4f/0x1350 net/ipv6/mcast.c:1841
 mld_send_initial_cr+0x1e5/0x2b0 net/ipv6/mcast.c:2091
 ipv6_mc_dad_complete+0x6d/0x3a0 net/ipv6/mcast.c:2103
 addrconf_dad_completed+0x743/0xe40 net/ipv6/addrconf.c:4231
 addrconf_dad_work+0xd60/0x15b0 net/ipv6/addrconf.c:4016
 process_one_work+0x6ca/0xc40 kernel/workqueue.c:2287
 worker_thread+0xae0/0x1440 kernel/workqueue.c:2433
 kthread+0x2d8/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
---[ end trace 678982a3ae7fe99e ]---
RIP: 0010:skb_panic+0x14a/0x150 net/core/skbuff.c:105
Code: 14 2f 85 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 49 89 e9 31 c0 53 41 55 41 54 41 57 e8 61 a3 d0 00 48 83 c4 20 <0f> 0b 0f 1f 40 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 68 4d 89
RSP: 0018:ffff8881ef12f908 EFLAGS: 00010282
RAX: 0000000000000086 RBX: ffff8881f28ce000 RCX: ef12cf2ae091aa00
RDX: 0000000000000000 RSI: 0000000000000402 RDI: 0000000000000000
RBP: ffff8881da6e1c00 R08: ffffffff814e6f67 R09: ffffed103edcaa08
R10: ffffed103edcaa08 R11: 1ffff1103edcaa07 R12: 000000000000008c
R13: 0000000000000080 R14: dffffc0000000000 R15: ffff8881da6e1c40
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95d37d1718 CR3: 00000001ac3b8000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400