linux-kernel - Re: [PATCH 1/2] s390: Fix wrong size in memcmp (netiucv)

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Date:	Mon, 31 Jan 2011 11:37:25 +0100
From:	Ursula Braun <ubraun@...ux.vnet.ibm.com>
To:	Stefan Weil <weil@...l.berlios.de>
Cc:	linux390@...ibm.com, Ursula Braun <ursula.braun@...ibm.com>,
	Frank Blaschka <blaschka@...ux.vnet.ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] s390: Fix wrong size in memcmp (netiucv)

Ack - thanks, Stefan.

We have added your netiucv patch to our local repository. It will be
part of our next patch collection submitted to Dave Miller for upstream
integration.

Regards, Ursula

On Sat, 2011-01-29 at 22:33 +0100, Stefan Weil wrote:
> This error was reported by cppcheck:
> drivers/s390/net/netiucv.c:568: error: Using sizeof for array given as function argument returns the size of pointer.
> 
> sizeof(ipuser) did not result in 16 (as many programmers would have
> expected) but sizeof(u8 *), so it is 4 or 8, too small here.
> 
> Cc: Ursula Braun <ursula.braun@...ibm.com>
> Cc: linux390@...ibm.com
> Cc: Frank Blaschka <blaschka@...ux.vnet.ibm.com>
> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
> Cc: linux-s390@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Stefan Weil <weil@...l.berlios.de>
> ---
>  drivers/s390/net/netiucv.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c
> index 65ebee0..b6a6356 100644
> --- a/drivers/s390/net/netiucv.c
> +++ b/drivers/s390/net/netiucv.c
> @@ -565,7 +565,7 @@ static int netiucv_callback_connreq(struct iucv_path *path,
>  	struct iucv_event ev;
>  	int rc;
> 
> -	if (memcmp(iucvMagic, ipuser, sizeof(ipuser)))
> +	if (memcmp(iucvMagic, ipuser, 16))
>  		/* ipuser must match iucvMagic. */
>  		return -EINVAL;
>  	rc = -EINVAL;


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