skbuff: skb_over_panic: text:00000000db5cfe19 len:56 put:8 head:000000008094d581 data:000000006eff4feb tail:0xc8 end:0xc0 dev:ip6tnl0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 1 PID: 6234 Comm: syz-executor.3 Not tainted 4.14.156-syzkaller #0
task: 0000000003ef3c3e task.stack: 00000000afda01c5
RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104
RSP: 0000:ffff8881d77079d8 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff8881c12a8640 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffffae66a420 RDI: ffffed103aee0f2d
RBP: ffffffffae88a0a0 R08: 0000000000000085 R09: ffffed103aee4ce9
R10: ffffed103aee4ce8 R11: ffff8881d7726747 R12: ffffffffadf8600e
R13: 0000000000000008 R14: ffff8881c46b4400 R15: 00000000000000c0
FS:  00007f9c0f146700(0000) GS:ffff8881d7700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9c11150000 CR3: 00000001a339e006 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put.cold+0x24/0x24 net/core/skbuff.c:1699
 mld_newpack+0x4ce/0x7a0 net/ipv6/mcast.c:1608
 add_grhead.isra.0+0x29c/0x370 net/ipv6/mcast.c:1691
 add_grec+0x6a3/0xf10 net/ipv6/mcast.c:1822
 mld_send_cr net/ipv6/mcast.c:1948 [inline]
 mld_ifc_timer_expire+0x340/0x7e0 net/ipv6/mcast.c:2455
 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279
 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318
 __run_timers kernel/time/timer.c:1636 [inline]
 run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1649
 __do_softirq+0x234/0x9ec kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x114/0x150 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0033:0x401a47
RSP: 002b:00007f9c0f145690 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 00000000f1896a8a RBX: 000000000000000b RCX: 000000000045a679
RDX: 0000000000000000 RSI: 00007f9c0f1456c0 RDI: 000000000000000b
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 20 ff 4c 8b 4c 24 10 8b 4b 78 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 9a 88 ae ff 74 24 10 ff 74 24 20 e8 49 a3 ee fe <0f> 0b e8 e7 7d fd fe 4c 8b 64 24 18 e8 bd 43 20 ff 48 c7 c1 60 
RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff8881d77079d8
---[ end trace 7c52e89cac2c4d7a ]---
PF_BRIDGE: RTM_SETLINK with unknown ifindex