From: Wei Liu <wei.liu2@citrix.com>
Date: Mon, 22 Apr 2013 02:20:43 +0000 (+0000)
Subject: xen-netback: don't disconnect frontend when seeing oversize packet
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~65^2~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=03393fd5cc2b6cdeec32b704ecba64dbb0feae3c;p=pandora-kernel.git

xen-netback: don't disconnect frontend when seeing oversize packet

Some frontend drivers are sending packets > 64 KiB in length. This length
overflows the length field in the first slot making the following slots have
an invalid length.

Turn this error back into a non-fatal error by dropping the packet. To avoid
having the following slots having fatal errors, consume all slots in the
packet.

This does not reopen the security hole in XSA-39 as if the packet as an
invalid number of slots it will still hit fatal error case.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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