icmp redirects, icmp 5:1

It seems that I’ve identified a memory leak when a 2.9.x router has to generate a lot of ICMP 5:1 packets. Has anyone ever touched on this before?

I’m having to reboot a router that has been working for 2+ years because of some subnet changes, and I think it’s all related to ICMP 5:1 packets. Memory climbs thru the roof after these packets are received. Funny thing is that the packet sniffer doesnt even see these, I guess its because they are generated in the router and packet sniffer only sniffs on the way in.

I’m working on a proof of concept, if I can reproduce it I’m think we will need 2.9.52 because it would become a possible DoS vector.