* [PATCH] crypto: drbg - Fix unused value warning in drbg_healthcheck_sanity()
@ 2021-09-10 19:01 Tim Gardner
2021-09-17 3:21 ` Herbert Xu
0 siblings, 1 reply; 2+ messages in thread
From: Tim Gardner @ 2021-09-10 19:01 UTC (permalink / raw)
To: linux-crypto; +Cc: tim.gardner, Herbert Xu, David S. Miller, linux-kernel
Coverity warns uf an unused value:
CID 44865 (#2 of 2): Unused value (UNUSED_VALUE)
assigned_value: Assigning value -14 to ret here, but that stored value is
overwritten before it can be used.
2006 int ret = -EFAULT;
...
value_overwrite: Overwriting previous write to ret with value from drbg_seed(drbg, &addtl, false).
2052 ret = drbg_seed(drbg, &addtl, false);
Fix this by removing the variable initializer.
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
---
crypto/drbg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/crypto/drbg.c b/crypto/drbg.c
index ea85d4a0fe9e..f72f340a1321 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -2003,7 +2003,7 @@ static inline int __init drbg_healthcheck_sanity(void)
#define OUTBUFLEN 16
unsigned char buf[OUTBUFLEN];
struct drbg_state *drbg = NULL;
- int ret = -EFAULT;
+ int ret;
int rc = -EFAULT;
bool pr = false;
int coreref = 0;
--
2.33.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] crypto: drbg - Fix unused value warning in drbg_healthcheck_sanity()
2021-09-10 19:01 [PATCH] crypto: drbg - Fix unused value warning in drbg_healthcheck_sanity() Tim Gardner
@ 2021-09-17 3:21 ` Herbert Xu
0 siblings, 0 replies; 2+ messages in thread
From: Herbert Xu @ 2021-09-17 3:21 UTC (permalink / raw)
To: Tim Gardner; +Cc: linux-crypto, David S. Miller, linux-kernel
On Fri, Sep 10, 2021 at 01:01:17PM -0600, Tim Gardner wrote:
> Coverity warns uf an unused value:
>
> CID 44865 (#2 of 2): Unused value (UNUSED_VALUE)
> assigned_value: Assigning value -14 to ret here, but that stored value is
> overwritten before it can be used.
> 2006 int ret = -EFAULT;
> ...
> value_overwrite: Overwriting previous write to ret with value from drbg_seed(drbg, &addtl, false).
> 2052 ret = drbg_seed(drbg, &addtl, false);
>
> Fix this by removing the variable initializer.
>
> Cc: Herbert Xu <herbert@gondor.apana.org.au>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: linux-crypto@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
> ---
> crypto/drbg.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Patch applied. Thanks.
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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