linux-kernel - [PATCH] net/ncsi: prevent memory leak in ncsi_rsp_handler

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Message-Id: <20190925215854.14284-1-navid.emamdoost@gmail.com>
Date:   Wed, 25 Sep 2019 16:58:53 -0500
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     emamd001@....edu, kjlu@....edu, smccaman@....edu,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        Samuel Mendoza-Jonas <sam@...dozajonas.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] net/ncsi: prevent memory leak in ncsi_rsp_handler_gc

In ncsi_rsp_handler_gc if allocation for nc->vlan_filter.vids fails the
allocated memory for nc->mac_filter.addrs should be released.

Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 net/ncsi/ncsi-rsp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
index d5611f04926d..f3f7c3772994 100644
--- a/net/ncsi/ncsi-rsp.c
+++ b/net/ncsi/ncsi-rsp.c
@@ -800,8 +800,10 @@ static int ncsi_rsp_handler_gc(struct ncsi_request *nr)
 	nc->vlan_filter.vids = kcalloc(rsp->vlan_cnt,
 				       sizeof(*nc->vlan_filter.vids),
 				       GFP_ATOMIC);
-	if (!nc->vlan_filter.vids)
+	if (!nc->vlan_filter.vids) {
+		kfree(nc->mac_filter.addrs);
 		return -ENOMEM;
+	}
 	/* Set VLAN filters active so they are cleared in the first
 	 * configuration state
 	 */
-- 
2.17.1