In Wireshark 2.0.0 to 2.0.13, the GPRS LLC dissector could go into a large loop. This was addressed in epan/dissectors/packet-gprs-llc.c by using a different integer data type.
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13603
https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html