netfilter: xt_hashlimit: fix a possible memory leak in htable_create()

In the htable_create(), hinfo is allocated by vmalloc()
So that if error occurred, hinfo should be freed.

Fixes: 11d5f15723c9 ("netfilter: xt_hashlimit: Create revision 2 to support higher pps rates")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 3e7d259..1ad4017 100644 (file)
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -295,9 +295,10 @@ static int htable_create(struct net *net, struct hashlimit_cfg3 *cfg,
 
        /* copy match config into hashtable config */
        ret = cfg_copy(&hinfo->cfg, (void *)cfg, 3);
-
-       if (ret)
+       if (ret) {
+               vfree(hinfo);
                return ret;
+       }
 
        hinfo->cfg.size = size;
        if (hinfo->cfg.max == 0)
@@ -814,7 +815,6 @@ hashlimit_mt_v1(const struct sk_buff *skb, struct xt_action_param *par)
        int ret;
 
        ret = cfg_copy(&cfg, (void *)&info->cfg, 1);
-
        if (ret)
                return ret;
 
@@ -830,7 +830,6 @@ hashlimit_mt_v2(const struct sk_buff *skb, struct xt_action_param *par)
        int ret;
 
        ret = cfg_copy(&cfg, (void *)&info->cfg, 2);
-
        if (ret)
                return ret;
 
@@ -921,7 +920,6 @@ static int hashlimit_mt_check_v1(const struct xt_mtchk_param *par)
                return ret;
 
        ret = cfg_copy(&cfg, (void *)&info->cfg, 1);
-
        if (ret)
                return ret;
 
@@ -940,7 +938,6 @@ static int hashlimit_mt_check_v2(const struct xt_mtchk_param *par)
                return ret;
 
        ret = cfg_copy(&cfg, (void *)&info->cfg, 2);
-
        if (ret)
                return ret;