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[IPX]: Header length validation needed

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This patch will linearize and check there is enough data.
It handles the pprop case as well as avoiding a whole audit of
the routing code.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2006-08-07 20:09:20 -07:00 • committed by David S. Miller
parent d14cc9a342
commit 8b5cc5ef40
1 changed files with 2 additions and 1 deletions
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3
net/ipx/af_ipx.c
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@ -1646,7 +1646,8 @@ static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_ty
ipx_pktsize = ntohs(ipx->ipx_pktsize); ipx_pktsize = ntohs(ipx->ipx_pktsize);
/* Too small or invalid header? */ /* Too small or invalid header? */
if (ipx_pktsize < sizeof(struct ipxhdr) || ipx_pktsize > skb->len) if (ipx_pktsize < sizeof(struct ipxhdr) ||
!pskb_may_pull(skb, ipx_pktsize))
goto drop; goto drop;
if (ipx->ipx_checksum != IPX_NO_CHECKSUM && if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&