mpls: In mpls_egress verify the packet length.
authorEric W. Biederman <ebiederm@xmission.com>
Thu, 12 Mar 2015 23:22:59 +0000 (18:22 -0500)
committerDavid S. Miller <davem@davemloft.net>
Fri, 13 Mar 2015 03:05:04 +0000 (23:05 -0400)
commit76fecd8275be6de76513430e7526825944ab932f
treec04917753aa8f8cd07d54140c9580af45c7f5dd8
parent2c29b2354a06f42493ddd2a5eb65962981e666ed
mpls: In mpls_egress verify the packet length.

Reobert Shearman noticed that mpls_egress is failing to verify that
the bytes to be examined are in fact present in the packet before
mpls_egress reads those bytes.

As suggested by David Miller reduce this to a single pskb_may_pull
call so that we don't do unnecessary work in the fast path.

Reported-by: Robert Shearman <rshearma@brocade.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/mpls/af_mpls.c