4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
[ Upstream commit 7dde07e9c53617549d67dd3e1d791496d0d3868e ]
According to my static checker we should unlock here before the return.
That seems reasonable to me as well.
Fixes" b9e69e127397 ("netfilter: xtables: don't hook tables by default")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Florian Westphal <fw@xxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netfilter/x_tables.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -1006,8 +1006,10 @@ struct xt_table *xt_find_table_lock(stru
list_for_each_entry(t, &init_net.xt.tables[af], list) {
if (strcmp(t->name, name))
continue;
- if (!try_module_get(t->me))
+ if (!try_module_get(t->me)) {
+ mutex_unlock(&xt[af].mutex);
return NULL;
+ }
mutex_unlock(&xt[af].mutex);
if (t->table_init(net) != 0) {