linux-kernel - [PATCH] openvswitch: Fix a possible memory leak on dst

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Message-Id: <1563466028-2531-1-git-send-email-yanhaishuang@cmss.chinamobile.com>
Date:   Fri, 19 Jul 2019 00:07:08 +0800
From:   Haishuang Yan <yanhaishuang@...s.chinamobile.com>
To:     Pravin B Shelar <pshelar@....org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Haishuang Yan <yanhaishuang@...s.chinamobile.com>
Subject: [PATCH] openvswitch: Fix a possible memory leak on dst_cache

dst_cache should be destroyed when fail to add flow actions.

Fixes: d71785ffc7e7 ("net: add dst_cache to ovs vxlan lwtunnel")
Signed-off-by: Haishuang Yan <yanhaishuang@...s.chinamobile.com>
---
 net/openvswitch/flow_netlink.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index d7559c6..1fd1cdd 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -2608,6 +2608,7 @@ static int validate_and_copy_set_tun(const struct nlattr *attr,
 			 sizeof(*ovs_tun), log);
 	if (IS_ERR(a)) {
 		dst_release((struct dst_entry *)tun_dst);
+		dst_cache_destroy(&tun_dst->u.tun_info.dst_cache);
 		return PTR_ERR(a);
 	}
 
-- 
1.8.3.1