Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Sat, 5 Jan 2019 10:52:23 -0600
From:   "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To:     Kangjie Lu <kjlu@umn.edu>, Jon Maloy <jon.maloy@ericsson.com>,
        Ying Xue <ying.xue@windriver.com>,
        "David S. Miller" <davem@davemloft.net>
Cc:     netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net,
        linux-kernel@vger.kernel.org,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH] tipc: fix memory leak in tipc_nl_compat_publ_dump
Message-ID: <20190105165223.GA3296@embeddedor>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.9.4 (2018-02-28)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

There is a memory leak in case genlmsg_put fails.

Fix this by freeing *args* before return.

Addresses-Coverity-ID: 1476406 ("Resource leak")
Fixes: 46273cf7e009 ("tipc: fix a missing check of genlmsg_put")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 net/tipc/netlink_compat.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index 40f5cae623a7..77e4b2418f30 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -904,8 +904,10 @@ static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
 
 	hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
 			  TIPC_NL_PUBL_GET);
-	if (!hdr)
+	if (!hdr) {
+		kfree_skb(args);
 		return -EMSGSIZE;
+	}
 
 	nest = nla_nest_start(args, TIPC_NLA_SOCK);
 	if (!nest) {
-- 
2.20.1