From f52d81dc27c3456c702e83183035142c222acdc7 Mon Sep 17 00:00:00 2001
From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Sat, 14 Dec 2013 07:29:29 +0100
Subject: [PATCH] ipv6: fix compiler warning in ipv6_exthdrs_len
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Commit 299603e8370a93dd5d8e8d800f0dff1ce2c53d36 ("net-gro: Prepare GRO
stack for the upcoming tunneling support") used an uninitialized variable
which leads to the following compiler warning:
net/ipv6/ip6_offload.c: In function ‘ipv6_gro_complete’:
net/ipv6/ip6_offload.c:178:24: warning: ‘optlen’ may be used uninitialized in this function [-Wmaybe-uninitialized]
opth = (void *)opth + optlen;
^
net/ipv6/ip6_offload.c:164:22: note: ‘optlen’ was declared here
int len = 0, proto, optlen;
^
Fix it up.
Cc: Jerry Chu <hkchu@google.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/ipv6/ip6_offload.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 7540a0ed75ae..08861f1ff883 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -161,7 +161,7 @@ static int ipv6_exthdrs_len(struct ipv6hdr *iph,
const struct net_offload **opps)
{
struct ipv6_opt_hdr *opth = NULL;
- int len = 0, proto, optlen;
+ int len = 0, optlen = 0, proto;
proto = iph->nexthdr;
for (;;) {
@@ -172,11 +172,12 @@ static int ipv6_exthdrs_len(struct ipv6hdr *iph,
if (!((*opps)->flags & INET6_PROTO_GSO_EXTHDR))
break;
}
- if (opth == NULL)
+ if (opth == NULL) {
opth = (void *)(iph+1);
- else
+ } else {
+ optlen = ipv6_optlen(opth);
opth = (void *)opth + optlen;
- optlen = ipv6_optlen(opth);
+ }
len += optlen;
proto = opth->nexthdr;
}
--
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