[PATCH net-next 04/14] bridge: mcast: Add a centralized error path
From: Ido Schimmel <idosch@nvidia.com>
Date: 2022-12-08 15:29:35
Also in:
bridge
Subsystem:
ethernet bridge, networking [general], the rest · Maintainers:
Nikolay Aleksandrov, Ido Schimmel, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <idosch@nvidia.com> --- net/bridge/br_mdb.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
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; }
--
2.37.3