[PATCH nf v2 1/1] netfilter: xt_CT: Fix one possible memleak of timeout

[gfree.wind@foxmail.com]

From: Gao Feng <fgao@ikuai8.com>

When nf_ct_timeout_ext_add failed in xt_ct_set_timeout, it should
free the timeout refcnt.

Now goto the err_put_timeout error handler instead of going ahead.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
---
 v2: Keep the ret = -ENOMEM, per Gao Feng
 v1: initial version

 net/netfilter/xt_CT.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/xt_CT.c b/net/netfilter/xt_CT.c
index b008db0..a1783b6 100644
--- a/net/netfilter/xt_CT.c
+++ b/net/netfilter/xt_CT.c
@@ -167,8 +167,10 @@ static void __xt_ct_tg_timeout_put(struct ctnl_timeout *timeout)
 		goto err_put_timeout;
 	}
 	timeout_ext = nf_ct_timeout_ext_add(ct, timeout, GFP_ATOMIC);
-	if (timeout_ext == NULL)
+	if (!timeout_ext) {
 		ret = -ENOMEM;
+		goto err_put_timeout;
+	}
 
 	rcu_read_unlock();
 	return ret;
-- 
1.9.1