From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 12 Nov 2019 09:19:26 +0100
Subject: s390/pkey: fix memory leak within _copy_apqns_from_user()
Git-commit: f9cac4fd8878929c6ebff0bd272317905d77c38a
Patch-mainline: v5.5-rc1
References: jsc#SLE-7533 LTC#178844

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

--- 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
 		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;