---

yaml --- r: 98363 b: refs/heads/master c: aea7427 h: refs/heads/master i: 98361: 1c8ded9 98359: 141e148 v: v3
git-mirror · Jun 19, 2008 · 9c5454a · 9c5454a
1 parent b01dbaf
commit 9c5454a
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Showing 2 changed files with 8 additions and 5 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ef3a62d272f033989e83eb1f26505f93f93e3e69
+refs/heads/master: aea7427f70cce5fa8f99ce447b213e9e3b49f24c
diff --git a/trunk/net/ipv6/ipv6_sockglue.c b/trunk/net/ipv6/ipv6_sockglue.c
@@ -345,18 +345,21 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	case IPV6_DSTOPTS:
 	{
 		struct ipv6_txoptions *opt;
+
+		/* remove any sticky options header with a zero option
+		 * length, per RFC3542.
+		 */
 		if (optlen == 0)
 			optval = NULL;
+		else if (optlen < sizeof(struct ipv6_opt_hdr) ||
+			 optlen & 0x7 || optlen > 8 * 255)
+			goto e_inval;
 
 		/* hop-by-hop / destination options are privileged option */
 		retv = -EPERM;
 		if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
 			break;
 
-		if (optlen < sizeof(struct ipv6_opt_hdr) ||
-		    optlen & 0x7 || optlen > 8 * 255)
-			goto e_inval;
-
 		opt = ipv6_renew_options(sk, np->opt, optname,
 					 (struct ipv6_opt_hdr __user *)optval,
 					 optlen);