From: Wei Liu <wei.liu2@citrix.com>
Date: Mon, 22 Apr 2013 02:20:41 +0000 (+0000)
Subject: xen-netfront: reduce gso_max_size to account for max TCP header
X-Git-Tag: v3.2.47~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23005ee8bad9bc505bb15006c02cab01a8718550;p=pandora-kernel.git

xen-netfront: reduce gso_max_size to account for max TCP header

commit 9ecd1a75d977e2e8c48139c7d3efed183f898d94 upstream.

The maximum packet including header that can be handled by netfront / netback
wire format is 65535. Reduce gso_max_size accordingly.

Drop skb and print warning when skb->len > 65535. This can 1) save the effort
to send malformed packet to netback, 2) help spotting misconfiguration of
netfront in the future.

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>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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