linux-kernel - Re: [patch] cciss: info leak in cciss_ioctl32

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Date:	Tue, 4 Jun 2013 04:16:41 -0700 (PDT)
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	P J P <ppandit@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Petr Matousek <pmatouse@...hat.com>,
	Vasily Kulikov <segoon@...nwall.com>
Subject: Re: [patch] cciss: info leak in cciss_ioctl32_passthru()

On Tue, Jun 04, 2013 at 04:09:10PM +0530, P J P wrote:
>    Hello Dan,
> ===
> diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
> index 6374dc1..34971aa 100644
> --- a/drivers/block/cciss.c
> +++ b/drivers/block/cciss.c
> @@ -1201,6 +1201,7 @@ static int cciss_ioctl32_passthru(struct
> block_device *bdev, fmode_t mode,
>  	int err;
>  	u32 cp;
> 
> +	memset(&arg64, 0, sizeof(arg64));
> 	...
> ===
> 
>   This exact same patch was included back in 2010 by Mr Vasiliy Kulikov.
> 
>  -> https://git.kernel.org/linus/7ab5118d7c2be650bc936894f159dc1c597badae
> 
> But there is no entry/log of its reversal. Any idea why was it removed?

No no.  Vasily patched cciss_ioctl32_big_passthru() and this patch
changes cciss_ioctl32_passthru().

regards,
dan carpenter

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