linux-kernel - [PATCH] genetlink: prevent memory leak in netlbl_unlabel

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Message-Id: <20190925221009.15523-1-navid.emamdoost@gmail.com>
Date:   Wed, 25 Sep 2019 17:10:08 -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>,
        Paul Moore <paul@...l-moore.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] genetlink: prevent memory leak in netlbl_unlabel_defconf

In netlbl_unlabel_defconf if netlbl_domhsh_add_default fails the
allocated entry should be released.

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

diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index d2e4ab8d1cb1..c63ec480ee4e 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -1541,8 +1541,10 @@ int __init netlbl_unlabel_defconf(void)
 	entry->family = AF_UNSPEC;
 	entry->def.type = NETLBL_NLTYPE_UNLABELED;
 	ret_val = netlbl_domhsh_add_default(entry, &audit_info);
-	if (ret_val != 0)
+	if (ret_val != 0) {
+		kfree(entry);
 		return ret_val;
+	}
 
 	netlbl_unlabel_acceptflg_set(1, &audit_info);
 
-- 
2.17.1