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bridge: mcast: Fix incomplete MDB dump

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Each MDB entry is encoded in a nested netlink attribute called
'MDBA_MDB_ENTRY'. In turn, this attribute contains another nested
attributed called 'MDBA_MDB_ENTRY_INFO', which encodes a single port
group entry within the MDB entry.

The cited commit added the ability to restart a dump from a specific
port group entry. However, on failure to add a port group entry to the
dump the entire MDB entry (stored in 'nest2') is removed, resulting in
missing port group entries.

Fix this by finalizing the MDB entry with the partial list of already
encoded port group entries.

Fixes: 5205e919c9 ("net: bridge: mcast: add support for src list and filter mode dumping")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2020-09-11 16:24:47 +03:00 committed by David S. Miller
parent 2291267e48
commit 12913f7459
1 changed files with 1 additions and 1 deletions
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2
net/bridge/br_mdb.c
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@ -243,7 +243,7 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
err = __mdb_fill_info(skb, mp, p);
if (err) {
nla_nest_cancel(skb, nest2);
nla_nest_end(skb, nest2);
goto out;
}
skip_pg: