tree 3b099a7b7306ee99fcb272e260b7344d34fdc666
parent 85f0379aa0f9366bb6918e2e898a915231176fbd
author Patrick Caulfeld <pcaulfie@redhat.com> 1200565528 +0000
committer David Teigland <teigland@redhat.com> 1201712683 -0600

dlm: Sanity check namelen before copying it

The 32/64 compatibility code in the DLM does not check the validity of
the lock name length passed into it, so it can easily overwrite memory
if the value is rubbish (as early versions of libdlm can cause with
unlock calls, it doesn't zero the field).

This patch restricts the length of the name to the amount of data
actually passed into the call.

Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>