tree aa6ceb9dafde5d1279b18da1e994f35a38f361a2
parent f1c2ef40c6436f8fa287ff1be2c75c4932180b1f
author Robert Shearman <rshearma@brocade.com> 1449775848 +0000
committer David S. Miller <davem@davemloft.net> 1449899024 -0500

mpls: validate L2 via address length

If an L2 via address for an mpls nexthop is specified, the length of
the L2 address must match that expected by the output device,
otherwise it could access memory beyond the end of the via address
buffer in the route.

This check was present prior to commit f8efb73c97e2 ("mpls: multipath
route support"), but got lost in the refactoring, so add it back,
applying it to all nexthops in multipath routes.

Fixes: f8efb73c97e2 ("mpls: multipath route support")
Signed-off-by: Robert Shearman <rshearma@brocade.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>