linux-kernel - Re: [PATCH 3/7] crypto: testmgr: fix warning

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Date:	Mon, 19 Oct 2009 15:52:47 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Felipe Contreras <felipe.contreras@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Jarod Wilson <jarod@...hat.com>,
	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>,
	Neil Horman <nhorman@...driver.com>,
	linux-crypto@...r.kernel.org
Subject: Re: [PATCH 3/7] crypto: testmgr: fix warning

On Mon, 19 Oct 2009, Felipe Contreras wrote:

> crypto/testmgr.c: In function ?test_cprng?:
> crypto/testmgr.c:1204: warning: ?err? may be used uninitialized in this function
> 
> Signed-off-by: Felipe Contreras <felipe.contreras@...il.com>
> ---
>  crypto/testmgr.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/crypto/testmgr.c b/crypto/testmgr.c
> index 6d5b746..1f2357b 100644
> --- a/crypto/testmgr.c
> +++ b/crypto/testmgr.c
> @@ -1201,7 +1201,7 @@ static int test_cprng(struct crypto_rng *tfm, struct cprng_testvec *template,
>  		      unsigned int tcount)
>  {
>  	const char *algo = crypto_tfm_alg_driver_name(crypto_rng_tfm(tfm));
> -	int err, i, j, seedsize;
> +	int err = 0, i, j, seedsize;
>  	u8 *seed;
>  	char result[32];

As it is not obvious to me immediately why/whether tcount couldn't be zero 
(which would cause uninitialized use of 'err'), I am not merging this 
through trivial tree. Herbert?

-- 
Jiri Kosina
SUSE Labs, Novell Inc.
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