This is a backportport of c5c106e4e3 into 2019.02
If a client sends a SUBSCRIBE packet containing a topic that consists of
approximately 65400 or more '/' characters, i.e. the topic hierarchy
separator, then a stack overflow will occur.
The issue is fixed in Mosquitto 1.6.6 and 1.5.9. Patches for older versions
are available at https://mosquitto.org/files/cve/2019-hier
Signed-off-by: Titouan Christophe <titouan.christophe@railnova.eu>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
d30a52e9f2