linux-kernel - [PATCH 4.4 42/73] bridge: re-introduce fix parsing of MLDv2 reports

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Date:   Wed, 28 Sep 2016 11:05:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Davide Caratti <dcaratti@...hat.com>,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
        Thadeu Lima de Souza Cascardo <cascardo@...hat.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.4 42/73] bridge: re-introduce fix parsing of MLDv2 reports

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Davide Caratti <dcaratti@...hat.com>


[ Upstream commit 9264251ee2a55bce8fb93826b3f581fb9eb7e2c2 ]

commit bc8c20acaea1 ("bridge: multicast: treat igmpv3 report with
INCLUDE and no sources as a leave") seems to have accidentally reverted
commit 47cc84ce0c2f ("bridge: fix parsing of MLDv2 reports"). This
commit brings back a change to br_ip6_multicast_mld2_report() where
parsing of MLDv2 reports stops when the first group is successfully
added to the MDB cache.

Fixes: bc8c20acaea1 ("bridge: multicast: treat igmpv3 report with INCLUDE and no sources as a leave")
Signed-off-by: Davide Caratti <dcaratti@...hat.com>
Acked-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/bridge/br_multicast.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1113,7 +1113,7 @@ static int br_ip6_multicast_mld2_report(
 		} else {
 			err = br_ip6_multicast_add_group(br, port,
 							 &grec->grec_mca, vid);
-			if (!err)
+			if (err)
 				break;
 		}
 	}