From: Matthew Daley <mattjd@gmail.com>
Date: Fri, 14 Oct 2011 18:45:04 +0000 (+0000)
Subject: x25: Handle undersized/fragmented skbs
X-Git-Tag: v3.1~9^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb101ed2c3c7c0224d16953fe77bfb9d6c2cb9df;p=pandora-kernel.git

x25: Handle undersized/fragmented skbs

There are multiple locations in the X.25 packet layer where a skb is
assumed to be of at least a certain size and that all its data is
currently available at skb->data.  These assumptions are not checked,
hence buffer overreads may occur.  Use pskb_may_pull to check these
minimal size assumptions and ensure that data is available at skb->data
when necessary, as well as use skb_copy_bits where needed.

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>
---

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