Crash with net.fuzz on: "panic: runtime error: slice bounds out of range"

[cclements]

Description of the bug or feature request

Crash with net.fuzz on:

panic: runtime error: slice bounds out of range
goroutine 12 [running]:
github.com/bettercap/bettercap/vendor/github.com/google/gopacket/layers.(*DNSQuestion).decode(0xc0004caf90, 0xc00057048a, 0x1f, 0x1f, 0xc, 0x14d3a80, 0x22a7de0, 0xc0004cb4c8, 0x0, 0x14d1e60, ...)
	/root/go/src/github.com/bettercap/bettercap/vendor/github.com/google/gopacket/layers/dns.go:615 +0x1a3
github.com/bettercap/bettercap/vendor/github.com/google/gopacket/layers.(*DNS).DecodeFromBytes(0xc0004cb420, 0xc00057048a, 0x1f, 0x1f, 0x14d3a80, 0x22a7de0, 0x14d1e60, 0xc0000ab9d0)
	/root/go/src/github.com/bettercap/bettercap/vendor/github.com/google/gopacket/layers/dns.go:328 +0x224
github.com/bettercap/bettercap/modules/net_sniff.mdnsParser(0xc003f19f40, 0x14fa600, 0xc003e334a0, 0xc000fe1a00, 0x1cc550d300)
	/root/go/src/github.com/bettercap/bettercap/modules/net_sniff/net_sniff_mdns.go:18 +0xc4
github.com/bettercap/bettercap/modules/net_sniff.onUDP(0xc003f19f40, 0x14fa600, 0xc003e334a0, 0xc0004cbd00)
	/root/go/src/github.com/bettercap/bettercap/modules/net_sniff/net_sniff_udp.go:22 +0x105
github.com/bettercap/bettercap/modules/net_sniff.mainParser(0x14fa600, 0xc003e334a0, 0x0, 0x49)
	/root/go/src/github.com/bettercap/bettercap/modules/net_sniff/net_sniff_parsers.go:56 +0x188
github.com/bettercap/bettercap/modules/net_sniff.(*Sniffer).onPacketMatched(...)
	/root/go/src/github.com/bettercap/bettercap/modules/net_sniff/net_sniff.go:142
github.com/bettercap/bettercap/modules/net_sniff.(*Sniffer).Start.func1()
	/root/go/src/github.com/bettercap/bettercap/modules/net_sniff/net_sniff.go:199 +0x40c
created by github.com/bettercap/bettercap/session.(*SessionModule).SetRunning
	/root/go/src/github.com/bettercap/bettercap/session/module.go:275 +0x1c1

Environment

Please provide:

• Bettercap version you are using ( bettercap v2.24.1 (built for linux amd64 with go1.12.8) [type 'help' for a list of commands] ).
• OS version and architecture you are using.

uname -a
Linux bran 5.2.9-arch1-1-ARCH #1 SMP PREEMPT Fri Aug 16 11:29:43 UTC 2019 x86_64 GNU/Linux

• Command line arguments you are using.
  bettercap -debug -eval 'net.fuzz on'

• Full debug output while reproducing the issue ( bettercap -debug ... ).

https://gist.github.com/cclements/97e7c1fb91f3b1aeab0ec1ae116bb142

Simply start bettercap and turn on net.fuzz and it will crash in a minute or two.