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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
        Ying Xue <ying.xue@windriver.com>,
        "David S . Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>, netdev@vger.kernel.org,
        tipc-discussion@lists.sourceforge.net
Subject: [PATCH AUTOSEL 4.19 170/219] tipc: fix memory leak in tipc_nl_compat_publ_dump
Date:   Fri, 22 Nov 2019 00:48:22 -0500
Message-Id: <20191122054911.1750-163-sashal@kernel.org>
In-Reply-To: <20191122054911.1750-1-sashal@kernel.org>
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From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>

[ Upstream commit f87d8ad9233f115db92c6c087d58403b0009ed36 ]

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>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 fab0384d2b4b3..b4860084a8f56 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -983,8 +983,10 @@ 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