ipv6: IPV6_PKTINFO relied userspace providing correct length

Signed-off-by: Ilpo Järvinen <[email protected]> Reported-by: Eric Sesterhenn <[email protected]> Signed-off-by: David S. Miller <[email protected]>
ambv · Jan 5, 2009 · 914d116 · 914d116
1 parent 22604c8
commit 914d116
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
@@ -404,7 +404,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 		else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
 			goto e_inval;
 
-		if (copy_from_user(&pkt, optval, optlen)) {
+		if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
 				retv = -EFAULT;
 				break;
 		}