diff options
| author | Patrick McHardy | 2014-01-09 18:42:40 +0000 |
|---|---|---|
| committer | Pablo Neira Ayuso | 2014-01-09 20:17:16 +0100 |
| commit | 7047f9d052c379e14b7693bb9f1b766827d0bc40 (patch) | |
| tree | ba7922b54a4c5b8690bba765b7aa9805cf561437 | |
| parent | c5c1f975ada48801f1e08e2215714315fa9cf306 (diff) | |
netfilter: nf_tables: take AF module reference when creating a table
The table refers to data of the AF module, so we need to make sure the
module isn't unloaded while the table exists.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 88f9c9448538..c35261496c30 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -430,9 +430,14 @@ static int nf_tables_newtable(struct sock *nlsk, struct sk_buff *skb, return -EINVAL; } + if (!try_module_get(afi->owner)) + return -EAFNOSUPPORT; + table = kzalloc(sizeof(*table) + nla_len(name), GFP_KERNEL); - if (table == NULL) + if (table == NULL) { + module_put(afi->owner); return -ENOMEM; + } nla_strlcpy(table->name, name, nla_len(name)); INIT_LIST_HEAD(&table->chains); @@ -468,6 +473,7 @@ static int nf_tables_deltable(struct sock *nlsk, struct sk_buff *skb, list_del(&table->list); nf_tables_table_notify(skb, nlh, table, NFT_MSG_DELTABLE, family); kfree(table); + module_put(afi->owner); return 0; } |