netdev - [PATCH RESEND] ipv6: return with appropriate error code when sending RH0 using setsockopt()

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Date:	Wed, 03 Sep 2008 16:41:06 +0800
From:	Shan Wei <shanwei@...fujitsu.com>
To:	davem@...emloft.net
CC:	netdev@...r.kernel.org
Subject: [PATCH RESEND] ipv6: return with appropriate error code when sending
 RH0 using setsockopt()

 I'm sorry to resend the patch, for that no one replied it from Jun 27.

 The kernel had removed the RH0(Type 0 Routing Header), but we can still
 send IPv6 packet with RH0 using sendmsg() or setsockopt().

 Compare with sendmsg() that returns EINVAL, but setsockopt() return EPERM.
 The patch fix it.

Signed-off-by: Shan Wei <shanwei@...fujitsu.com>
---
 net/ipv6/ipv6_sockglue.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 4e5eac3..7a58597 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -353,9 +353,10 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 			goto e_inval;
 
 		/* hop-by-hop / destination options are privileged option */
-		retv = -EPERM;
-		if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
+		if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) {
+			retv = -EPERM;
 			break;
+		}
 
 		opt = ipv6_renew_options(sk, np->opt, optname,
 					 (struct ipv6_opt_hdr __user *)optval,
@@ -365,6 +366,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 			break;
 		}
 
+		retv = -EINVAL;
 		/* routing header option needs extra check */
 		if (optname == IPV6_RTHDR && opt && opt->srcrt) {
 			struct ipv6_rt_hdr *rthdr = opt->srcrt;
-- 
1.6.0


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