linux-kernel - [PATCH 4.19 234/243] crypto: user - fix memory leak in crypto

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Message-Id: <20191211150355.127477170@linuxfoundation.org>
Date:   Wed, 11 Dec 2019 16:06:36 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH 4.19 234/243] crypto: user - fix memory leak in crypto_report

From: Navid Emamdoost <navid.emamdoost@...il.com>

commit ffdde5932042600c6807d46c1550b28b0db6a3bc upstream.

In crypto_report, a new skb is created via nlmsg_new(). This skb should
be released if crypto_report_alg() fails.

Fixes: a38f7907b926 ("crypto: Add userspace configuration API")
Cc: <stable@...r.kernel.org>
Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 crypto/crypto_user.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -288,8 +288,10 @@ static int crypto_report(struct sk_buff
 drop_alg:
 	crypto_mod_put(alg);
 
-	if (err)
+	if (err) {
+		kfree_skb(skb);
 		return err;
+	}
 
 	return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
 }