netdev - [PATCH net-next v2 02/13] bridge: mcast: Account for missing attributes

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Date: Wed, 25 Oct 2023 15:30:09 +0300
From: Ido Schimmel <idosch@...dia.com>
To: <netdev@...r.kernel.org>, <bridge@...ts.linux-foundation.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<edumazet@...gle.com>, <roopa@...dia.com>, <razor@...ckwall.org>,
	<mlxsw@...dia.com>, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next v2 02/13] bridge: mcast: Account for missing attributes

The 'MDBA_MDB' and 'MDBA_MDB_ENTRY' nest attributes are not accounted
for when calculating the size of MDB notifications. Add them along with
comments for existing attributes.

Signed-off-by: Ido Schimmel <idosch@...dia.com>
Acked-by: Nikolay Aleksandrov <razor@...ckwall.org>
---
 net/bridge/br_mdb.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index fb58bb1b60e8..08de94bffc12 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -452,11 +452,18 @@ static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
 
 static size_t rtnl_mdb_nlmsg_size(struct net_bridge_port_group *pg)
 {
-	size_t nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
-			    nla_total_size(sizeof(struct br_mdb_entry)) +
-			    nla_total_size(sizeof(u32));
 	struct net_bridge_group_src *ent;
-	size_t addr_size = 0;
+	size_t nlmsg_size, addr_size = 0;
+
+	nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
+		     /* MDBA_MDB */
+		     nla_total_size(0) +
+		     /* MDBA_MDB_ENTRY */
+		     nla_total_size(0) +
+		     /* MDBA_MDB_ENTRY_INFO */
+		     nla_total_size(sizeof(struct br_mdb_entry)) +
+		     /* MDBA_MDB_EATTR_TIMER */
+		     nla_total_size(sizeof(u32));
 
 	if (!pg)
 		goto out;
-- 
2.40.1