linux-kernel - [PATCH] crypto: user - fix memory leak in crypto

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Date:   Fri,  4 Oct 2019 14:34:54 -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>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: user - fix memory leak in crypto_reportstat

In crypto_reportstat, a new skb is created by nlmsg_new(). This skb is
leaked if crypto_reportstat_alg() fails. Required release for skb is
added.

Fixes: cac5818c25d0 ("crypto: user - Implement a generic crypto statistics")
Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 crypto/crypto_user_stat.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crypto/crypto_user_stat.c b/crypto/crypto_user_stat.c
index 8bad88413de1..1be95432fa23 100644
--- a/crypto/crypto_user_stat.c
+++ b/crypto/crypto_user_stat.c
@@ -328,8 +328,10 @@ int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
 drop_alg:
 	crypto_mod_put(alg);
 
-	if (err)
+	if (err) {
+		kfree_skb(skb);
 		return err;
+	}
 
 	return nlmsg_unicast(net->crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
 }
-- 
2.17.1