From 8b5cc5ef40c83c6ea4c90b203bb2c8b17edfa11b Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 7 Aug 2006 20:09:20 -0700 Subject: [PATCH] [IPX]: Header length validation needed 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 Signed-off-by: David S. Miller --- net/ipx/af_ipx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c index aa34ff4b707c..c13e86b14f69 100644 --- a/net/ipx/af_ipx.c +++ b/net/ipx/af_ipx.c @@ -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); /* 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; if (ipx->ipx_checksum != IPX_NO_CHECKSUM && -- 2.20.1