| From | Sasha Levin <> | Subject | [PATCH AUTOSEL for 4.9 110/190] netfilter: x_tables: unlock on error in xt_find_table_lock() | Date | Thu, 8 Mar 2018 04:59:40 +0000 |
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From: Dan Carpenter <dan.carpenter@oracle.com>
[ 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@oracle.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- net/netfilter/x_tables.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index e47ade305a46..fdf90221b4a7 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -1004,8 +1004,10 @@ struct xt_table *xt_find_table_lock(struct net *net, u_int8_t af, 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) { -- 2.14.1
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