skbuff: skb_over_panic: text:ffffffff83b2a4ff len:76 put:20 head:ffff8881e2dfd000 data:ffff8881e2dfd040 tail:0x8c end:0x80 dev:syztnl1
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:109!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G        W         5.4.197-syzkaller-00012-gdef19b1cf16c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:skb_panic+0x14a/0x150 net/core/skbuff.c:105
Code: f0 ee 84 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 bf 62 c5 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:ffff8881f5e1f9e8 EFLAGS: 00010286
RAX: 0000000000000086 RBX: ffff8881b1ab4000 RCX: acdf88b7c700e000
RDX: 0000000000000502 RSI: 0000000000000502 RDI: 0000000000000000
RBP: ffff8881e2dfd000 R08: ffffffff814a983a R09: ffffed103ebc3ef5
R10: ffffed103ebc3ef5 R11: 1ffff1103ebc3ef4 R12: 000000000000008c
R13: 0000000000000080 R14: dffffc0000000000 R15: ffff8881e2dfd040
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5842530662 CR3: 00000001e0ffc000 CR4: 00000000003406e0
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:1877
 add_grhead net/ipv6/mcast.c:1714 [inline]
 add_grec+0xe4f/0x1350 net/ipv6/mcast.c:1841
 mld_send_cr net/ipv6/mcast.c:1967 [inline]
 mld_ifc_timer_expire+0x723/0xb30 net/ipv6/mcast.c:2474
 call_timer_fn+0x31/0x350 kernel/time/timer.c:1418
 expire_timers+0x21e/0x400 kernel/time/timer.c:1463
 __run_timers+0x5b0/0x6b0 kernel/time/timer.c:1787
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
 __do_softirq+0x23e/0x643 kernel/softirq.c:292
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:603
 smpboot_thread_fn+0x4d7/0x880 kernel/smpboot.c:165
 kthread+0x2d8/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace dcb2f4b42bdbf436 ]---
RIP: 0010:skb_panic+0x14a/0x150 net/core/skbuff.c:105
Code: f0 ee 84 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 bf 62 c5 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:ffff8881f5e1f9e8 EFLAGS: 00010286
RAX: 0000000000000086 RBX: ffff8881b1ab4000 RCX: acdf88b7c700e000
RDX: 0000000000000502 RSI: 0000000000000502 RDI: 0000000000000000
RBP: ffff8881e2dfd000 R08: ffffffff814a983a R09: ffffed103ebc3ef5
R10: ffffed103ebc3ef5 R11: 1ffff1103ebc3ef4 R12: 000000000000008c
R13: 0000000000000080 R14: dffffc0000000000 R15: ffff8881e2dfd040
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5842530662 CR3: 00000001e0ffc000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400