linux-kernel - Re: [PATCH] scsi: dpt

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Message-ID: <20100714185831.GA5164@bicker>
Date:	Wed, 14 Jul 2010 20:58:31 +0200
From:	Dan Carpenter <error27@...il.com>
To:	Kulikov Vasiliy <segooon@...il.com>
Cc:	kernel-janitors@...r.kernel.org,
	Adaptec OEM Raid Solutions <aacraid@...ptec.com>,
	"James E.J. Bottomley" <James.Bottomley@...e.de>,
	Julia Lawall <julia@...u.dk>,
	Frederic Weisbecker <fweisbec@...il.com>,
	John Kacur <jkacur@...hat.com>,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: dpt_i2o: fix memory leak

On Wed, Jul 14, 2010 at 09:53:27PM +0400, Kulikov Vasiliy wrote:
> Free allocated memory if adpt_ioctl_to_context() failed.
> 
> Signed-off-by: Kulikov Vasiliy <segooon@...il.com>
> ---
>  drivers/scsi/dpt_i2o.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
> index f2d4df1..dd9a43b 100644
> --- a/drivers/scsi/dpt_i2o.c
> +++ b/drivers/scsi/dpt_i2o.c
> @@ -1839,8 +1839,10 @@ static int adpt_i2o_passthru(adpt_hba* pHba, u32 __user *arg)
>  	sg_offset = (msg[0]>>4)&0xf;
>  	msg[2] = 0x40000000; // IOCTL context
>  	msg[3] = adpt_ioctl_to_context(pHba, reply);

This patch is wrong I'm afraid.  adpt_ioctl_to_context() frees "reply" if
there is an error.

regards,
dan carpenter

> -	if (msg[3] == (u32)-1)
> +	if (msg[3] == (u32)-1) {
> +		kfree(reply);
>  		return -EBUSY;
> +	}
>  
>  	memset(sg_list,0, sizeof(sg_list[0])*pHba->sg_tablesize);
>  	if(sg_offset) {
> -- 

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