From a858d64b7709ca7bd2ee71d66ef3b7190cdcbb7d Mon Sep 17 00:00:00 2001 From: Li Wei Date: Tue, 17 Jul 2012 15:28:59 +0800 Subject: [PATCH] ipv6: fix unappropriate errno returned for non-multicast address We need to check the passed in multicast address and return appropriate errno(EINVAL) if it is not valid. And it's no need to walk through the ipv6_mc_list in this situation. Signed-off-by: Li Wei Signed-off-by: David S. Miller --- net/ipv6/mcast.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 6d0f5dc8e3a6..92f8e48e4ba4 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -211,6 +211,9 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) struct ipv6_mc_socklist __rcu **lnk; struct net *net = sock_net(sk); + if (!ipv6_addr_is_multicast(addr)) + return -EINVAL; + spin_lock(&ipv6_sk_mc_lock); for (lnk = &np->ipv6_mc_list; (mc_lst = rcu_dereference_protected(*lnk, -- 2.20.1