From 3a084ddb4bf299a6e898a9a07c89f3917f0713f7 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Thu, 3 May 2012 22:37:45 +0000 Subject: net: IP_MULTICAST_IF setsockopt now recognizes struct mreq Until now, struct mreq has not been recognized and it was worked with as with struct in_addr. That means imr_multiaddr was copied to imr_address. So do recognize struct mreq here and copy that correctly. Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- net/ipv4/ip_sockglue.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) (limited to 'net/ipv4/ip_sockglue.c') diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index 51c6c672c8aa..0d11f234d615 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -673,10 +673,15 @@ static int do_ip_setsockopt(struct sock *sk, int level, break; } else { memset(&mreq, 0, sizeof(mreq)); - if (optlen >= sizeof(struct in_addr) && - copy_from_user(&mreq.imr_address, optval, - sizeof(struct in_addr))) - break; + if (optlen >= sizeof(struct ip_mreq)) { + if (copy_from_user(&mreq, optval, + sizeof(struct ip_mreq))) + break; + } else if (optlen >= sizeof(struct in_addr)) { + if (copy_from_user(&mreq.imr_address, optval, + sizeof(struct in_addr))) + break; + } } if (!mreq.imr_ifindex) { -- cgit v1.2.3