linux-kernel - Re: [patch] raw: don't allow the creation of a raw device with minor number 0

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Date:	Fri, 12 Jan 2007 17:58:41 -0500
From:	jmoyer@...hat.com
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Steven Fernandez <sfernand@...hat.com>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [patch] raw: don't allow the creation of a raw device with minor number 0

==> Regarding Re: [patch] raw: don't allow the creation of a raw device with minor number 0; Jan Engelhardt <jengelh@...ux01.gwdg.de> adds:

jengelh> On Jan 12 2007 11:32, Jeff Moyer wrote:

>> Date: Fri, 12 Jan 2007 11:32:11 -0500
>> From: Jeff Moyer <jmoyer@...hat.com>
>> To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
>> Cc: Steven Fernandez <sfernand@...hat.com>, Andrew Morton <akpm@...l.org>
>> Subject: [patch] raw: don't allow the creation of a raw device with minor
>> number 0
>> 
>> Hi,
>> 
>> Minor number 0 (under the raw major) is reserved for the rawctl device
>> file, which is used to query, set, and unset raw device bindings.
>> However, the ioctl interface does not protect the user from specifying
>> a raw device with minor number 0:

jengelh> No idea what to say about this... probably:

jengelh>   What:   RAW driver (CONFIG_RAW_DRIVER)
jengelh>   When:   December 2005
jengelh>   Why:    declared obsolete since kernel 2.6.3
jengelh>           O_DIRECT can be used instead
jengelh>   Who:    Adrian Bunk <bunk@...sta.de>

It's still present, still used, and so would benefit from being fixed, in
my opinion.

Cheers,

Jeff
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