x25: Prevent skb overreads when checking call user data
authorMatthew Daley <mattjd@gmail.com>
Fri, 14 Oct 2011 18:45:05 +0000 (18:45 +0000)
committerDavid S. Miller <davem@davemloft.net>
Mon, 17 Oct 2011 23:31:40 +0000 (19:31 -0400)
commit7f81e25befdfb3272345a2e775f520e1d515fa20
tree02f02c9808a19c09977eebea9e3a9e2b3eac617f
parentcb101ed2c3c7c0224d16953fe77bfb9d6c2cb9df
x25: Prevent skb overreads when checking call user data

x25_find_listener does not check that the amount of call user data given
in the skb is big enough in per-socket comparisons, hence buffer
overreads may occur.  Fix this by adding a check.

Signed-off-by: Matthew Daley <mattjd@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andrew Hendry <andrew.hendry@gmail.com>
Cc: stable <stable@kernel.org>
Acked-by: Andrew Hendry <andrew.hendry@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/x25/af_x25.c