From: Eric Dumazet <edumazet@google.com>
Date: Sun, 10 Jun 2012 23:24:00 +0000 (+0000)
Subject: lpc_eth: add missing ndo_change_mtu()
X-Git-Tag: v3.5-rc3~22^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e30478598a8476d02e3b00caa89ce1a3b1dad54b;p=pandora-kernel.git

lpc_eth: add missing ndo_change_mtu()

lpc_eth does a copy of transmitted skbs to DMA area, without checking
skb lengths, so can trigger buffer overflows :

memcpy(pldat->tx_buff_v + txidx * ENET_MAXF_SIZE, skb->data, len);

One way to get bigger skbs is to allow MTU changes above the 1500 limit.

Calling eth_change_mtu() in ndo_change_mtu() makes sure this cannot
happen.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Roland Stigge <stigge@antcom.de>
Cc: Kevin Wells <kevin.wells@nxp.com>
Acked-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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