From: Eldad Zack <eldad@fogrefinery.com>
Date: Sun, 20 May 2012 01:59:33 +0000 (+0000)
Subject: ipv6/exthdrs: strict Pad1 and PadN check
X-Git-Tag: v3.5-rc1~191^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b905fe68433378032b851c4d81a59187689fa52;p=pandora-kernel.git

ipv6/exthdrs: strict Pad1 and PadN check

The following tightens the padding check from commit
c1412fce7eccae62b4de22494f6ab3ff8a90c0c6 :

* Take into account combinations of consecutive Pad1 and PadN.

* Catch the corner case of when only padding is present in the
  header, when the extention header length is 0 (i.e., 8 bytes).
  In this case, the header would have exactly 6 bytes of padding:

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
:  Next Header  : Hdr Ext Len=0 :                               :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                               +
:                        Padding (Pad1 or PadN)                 :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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