From: Changli Gao <xiaosuo@gmail.com>
Date: Wed, 2 Jun 2010 14:32:42 +0000 (-0700)
Subject: cls_u32: use skb_header_pointer() to dereference data safely
X-Git-Tag: v2.6.35-rc2~4^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d;p=pandora-kernel.git

cls_u32: use skb_header_pointer() to dereference data safely

use skb_header_pointer() to dereference data safely

the original skb->data dereference isn't safe, as there isn't any skb->len or
skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch.
And when the skb isn't long enough, we terminate the function u32_classify()
immediately with -1.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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