4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -507,8 +507,10 @@ 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;
--
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