netdev - [PATCH net-next 02/14] ipv6: consolidate error paths in ipv6_frag

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Date:	Wed,  8 Oct 2008 15:51:50 +0400
From:	"Denis V. Lunev" <den@...nvz.org>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, dlezcano@...ibm.com,
	benjamin.thery@...l.net, xemul@...nvz.org, yoshfuji@...ux-ipv6.org,
	"Denis V. Lunev" <den@...nvz.org>
Subject: [PATCH net-next 02/14] ipv6: consolidate error paths in ipv6_frag_rcv

Signed-off-by: Denis V. Lunev <den@...nvz.org>
---
 net/ipv6/reassembly.c |   22 ++++++++++------------
 1 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 2eeadfa..f4f62f0 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -578,19 +578,12 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
 	IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS);
 
 	/* Jumbo payload inhibits frag. header */
-	if (hdr->payload_len==0) {
-		IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
-		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
-				  skb_network_header_len(skb));
-		return -1;
-	}
+	if (hdr->payload_len==0)
+		goto fail_hdr;
+
 	if (!pskb_may_pull(skb, (skb_transport_offset(skb) +
-				 sizeof(struct frag_hdr)))) {
-		IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
-		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
-				  skb_network_header_len(skb));
-		return -1;
-	}
+				 sizeof(struct frag_hdr))))
+		goto fail_hdr;
 
 	hdr = ipv6_hdr(skb);
 	fhdr = (struct frag_hdr *)skb_transport_header(skb);
@@ -624,6 +617,11 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
 	IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
 	kfree_skb(skb);
 	return -1;
+
+fail_hdr:
+	IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
+	icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb_network_header_len(skb));
+	return -1;
 }
 
 static struct inet6_protocol frag_protocol =
-- 
1.5.3.rc5

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