Commit a858d64b authored by Li Wei's avatar Li Wei Committed by David S. Miller

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: default avatarLi Wei <lw@cn.fujitsu.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c41e4130
......@@ -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,
......
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