Patch "s390/crypto: unlock on error in prng_tdes_read()" has been added to the 4.4-stable tree

Patch "s390/crypto: unlock on error in prng_tdes_read()" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    s390/crypto: unlock on error in prng_tdes_read()

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     s390-crypto-unlock-on-error-in-prng_tdes_read.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 9e6e7c74315095fd40f41003850690c711e44420 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 18 Nov 2016 14:11:00 +0300
Subject: s390/crypto: unlock on error in prng_tdes_read()

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 9e6e7c74315095fd40f41003850690c711e44420 upstream.

We added some new locking but forgot to unlock on error.

Fixes: 57127645d79d ("s390/zcrypt: Introduce new SHA-512 based Pseudo Random Generator.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/s390/crypto/prng.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -565,8 +565,10 @@ static ssize_t prng_tdes_read(struct fil
 		prng_data->prngws.byte_counter += n;
 		prng_data->prngws.reseed_counter += n;
 
-		if (copy_to_user(ubuf, prng_data->buf, chunk))
-			return -EFAULT;
+		if (copy_to_user(ubuf, prng_data->buf, chunk)) {
+			ret = -EFAULT;
+			break;
+		}
 
 		nbytes -= chunk;
 		ret += chunk;


Patches currently in stable-queue which might be from dan.carpenter@oracle.com are

queue-4.4/mmc-mmc_test-uninitialized-return-value.patch
queue-4.4/target-iscsi-fix-double-free-in-lio_target_tiqn_addtpg.patch
queue-4.4/s390-crypto-unlock-on-error-in-prng_tdes_read.patch
queue-4.4/usb-xhci-mem-use-passed-in-gfp-flags-instead-of-gfp_kernel.patch
queue-4.4/iommu-amd-missing-error-code-in-amd_iommu_init_device.patch