From: Dan Carpenter <dan.carpenter@oracle.com>
To: Herbert Xu <herbert@gondor.apana.org.au>,
Harald Freudenberger <freude@linux.vnet.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-crypto@vger.kernel.org, linux-s390@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [patch] s390/crypto: unlock on error in prng_tdes_read()
Date: Fri, 18 Nov 2016 14:11:00 +0300 [thread overview]
Message-ID: <20161118105451.GA26523@mwanda> (raw)
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>
diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index 9cc050f..1113389 100644
--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -507,8 +507,10 @@ static ssize_t prng_tdes_read(struct file *file, char __user *ubuf,
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;
next reply other threads:[~2016-11-18 11:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-18 11:11 Dan Carpenter [this message]
2016-11-18 12:12 ` [patch] s390/crypto: unlock on error in prng_tdes_read() Martin Schwidefsky
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