linux-kernel - [PATCH AUTOSEL 5.4 131/205] s390/pkey: fix memory leak within _copy_apqns_from

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Date:   Thu, 16 Jan 2020 11:41:46 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Heiko Carstens <heiko.carstens@...ibm.com>,
        Markus Elfring <Markus.Elfring@....de>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Sasha Levin <sashal@...nel.org>, linux-s390@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 131/205] s390/pkey: fix memory leak within _copy_apqns_from_user()

From: Heiko Carstens <heiko.carstens@...ibm.com>

[ Upstream commit f9cac4fd8878929c6ebff0bd272317905d77c38a ]

Fixes: f2bbc96e7cfad ("s390/pkey: add CCA AES cipher key support")
Reported-by: Markus Elfring <Markus.Elfring@....de>
Reported-by: Christian Borntraeger <borntraeger@...ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
Signed-off-by: Vasily Gorbik <gor@...ux.ibm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/s390/crypto/pkey_api.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c
index 9de3d46b3253..e17fac20127e 100644
--- a/drivers/s390/crypto/pkey_api.c
+++ b/drivers/s390/crypto/pkey_api.c
@@ -740,8 +740,10 @@ static void *_copy_apqns_from_user(void __user *uapqns, size_t nr_apqns)
 		kapqns = kmalloc(nbytes, GFP_KERNEL);
 		if (!kapqns)
 			return ERR_PTR(-ENOMEM);
-		if (copy_from_user(kapqns, uapqns, nbytes))
+		if (copy_from_user(kapqns, uapqns, nbytes)) {
+			kfree(kapqns);
 			return ERR_PTR(-EFAULT);
+		}
 	}
 
 	return kapqns;
-- 
2.20.1