From 160dd93114ddd31ed2b6290a7495d53717b79cf8 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Sat, 10 Dec 2022 16:56:23 +0200 Subject: bridge: mcast: Add a centralized error path Subsequent patches will add memory allocations in br_mdb_config_init() as the MDB configuration structure will include a linked list of source entries. This memory will need to be freed regardless if br_mdb_add() succeeded or failed. As a preparation for this change, add a centralized error path where the memory will be freed. Note that br_mdb_del() already has one error path and therefore does not require any changes. Signed-off-by: Ido Schimmel Acked-by: Nikolay Aleksandrov Signed-off-by: Jakub Kicinski --- net/bridge/br_mdb.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'net/bridge/br_mdb.c') diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index fcdd464cf997..95780652cdbf 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -1053,28 +1053,29 @@ static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, if (err) return err; + err = -EINVAL; /* host join errors which can happen before creating the group */ if (!cfg.p && !br_group_is_l2(&cfg.group)) { /* don't allow any flags for host-joined IP groups */ if (cfg.entry->state) { NL_SET_ERR_MSG_MOD(extack, "Flags are not allowed for host groups"); - return -EINVAL; + goto out; } if (!br_multicast_is_star_g(&cfg.group)) { NL_SET_ERR_MSG_MOD(extack, "Groups with sources cannot be manually host joined"); - return -EINVAL; + goto out; } } if (br_group_is_l2(&cfg.group) && cfg.entry->state != MDB_PERMANENT) { NL_SET_ERR_MSG_MOD(extack, "Only permanent L2 entries allowed"); - return -EINVAL; + goto out; } if (cfg.p) { if (cfg.p->state == BR_STATE_DISABLED && cfg.entry->state != MDB_PERMANENT) { NL_SET_ERR_MSG_MOD(extack, "Port is in disabled state and entry is not permanent"); - return -EINVAL; + goto out; } vg = nbp_vlan_group(cfg.p); } else { @@ -1096,6 +1097,7 @@ static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, err = __br_mdb_add(&cfg, extack); } +out: return err; } -- cgit v1.2.3