linux-kernel - RE: [PATCH] cpqarray: check put

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Date:	Thu, 29 Jul 2010 20:16:53 +0000
From:	"Miller, Mike (OS Dev)" <Mike.Miller@...com>
To:	Kulikov Vasiliy <segooon@...il.com>,
	"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
CC:	Chirag Kantharia <chirag.kantharia@...com>,
	Jens Axboe <jaxboe@...ionio.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	Arnd Bergmann <arnd@...db.de>,
	ISS StorageDev <iss_storagedev@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] cpqarray: check put_user() result

 

> -----Original Message-----
> From: Kulikov Vasiliy [mailto:segooon@...il.com] 
> Sent: Thursday, July 29, 2010 10:55 AM
> To: kernel-janitors@...r.kernel.org
> Cc: Chirag Kantharia; Jens Axboe; Andrew Morton; Alexey 
> Dobriyan; Christoph Hellwig; Arnd Bergmann; ISS StorageDev; 
> linux-kernel@...r.kernel.org
> Subject: [PATCH] cpqarray: check put_user() result
> 
> put_user() may fail, if so return -EFAULT.
> 
> Signed-off-by: Kulikov Vasiliy <segooon@...il.com>
> ---
>  drivers/block/cpqarray.c |    6 ++++--
>  1 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/block/cpqarray.c 
> b/drivers/block/cpqarray.c index 9473215..d53b029 100644
> --- a/drivers/block/cpqarray.c
> +++ b/drivers/block/cpqarray.c
> @@ -1179,7 +1179,8 @@ out_passthru:
>  		return error;
>  	case IDAGETCTLRSIG:
>  		if (!arg) return -EINVAL;
> -		put_user(host->ctlr_sig, (int __user *)arg);
> +		if (put_user(host->ctlr_sig, (int __user *)arg))
> +			return -EFAULT;
>  		return 0;
>  	case IDAREVALIDATEVOLS:
>  		if (MINOR(bdev->bd_dev) != 0)
> @@ -1187,7 +1188,8 @@ out_passthru:
>  		return revalidate_allvol(host);
>  	case IDADRIVERVERSION:
>  		if (!arg) return -EINVAL;
> -		put_user(DRIVER_VERSION, (unsigned long __user *)arg);
> +		if (put_user(DRIVER_VERSION, (unsigned long 
> __user *)arg))
> +			return -EFAULT;
>  		return 0;
>  	case IDAGETPCIINFO:
>  	{
> --
> 1.7.0.4
> 
> 
Acked-by: Mike Miller <mike.miller@...com>--
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