[Bridge] [PATCH 3.13.y-ckt 035/122] bridge/mdb: remove wrong use of NLM_F_MULTI

Kamal Mostafa kamal at canonical.com
Wed Jun 17 22:27:42 UTC 2015

3.13.11-ckt22 -stable review patch.  If anyone has any objections, please let me know.


From: Nicolas Dichtel <nicolas.dichtel at 6wind.com>

commit 821996795973fd52703c35811a03db9fec1ac141 upstream.

NLM_F_MULTI must be used only when a NLMSG_DONE message is sent. In fact,
it is sent only at the end of a dump.

Libraries like libnl will wait forever for NLMSG_DONE.

Fixes: 37a393bc4932 ("bridge: notify mdb changes via netlink")
CC: Cong Wang <amwang at redhat.com>
CC: Stephen Hemminger <stephen at networkplumber.org>
CC: bridge at lists.linux-foundation.org
Signed-off-by: Nicolas Dichtel <nicolas.dichtel at 6wind.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
 net/bridge/br_mdb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index b7b1914..b734575 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -170,7 +170,7 @@ static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
 	struct br_port_msg *bpm;
 	struct nlattr *nest, *nest2;
-	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
+	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
 	if (!nlh)
 		return -EMSGSIZE;

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