linux-kernel - Re: [PATCH 2/3] p9auth: add CAP_GRANT_ID to authorize use of /dev/caphash

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Message-ID: <20100421025411.GA10258@kroah.com>
Date:	Tue, 20 Apr 2010 19:54:11 -0700
From:	Greg KH <greg@...ah.com>
To:	"Serge E. Hallyn" <serue@...ibm.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Howells <dhowells@...hat.com>,
	Ashwin Ganti <ashwin.ganti@...il.com>, rsc@...ch.com,
	ericvh@...il.com, linux-security-module@...r.kernel.org,
	Ron Minnich <rminnich@...il.com>, jt.beard@...il.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrew Morgan <morgan@...nel.org>, oleg@...ibm.com,
	Eric Paris <eparis@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [PATCH 2/3] p9auth: add CAP_GRANT_ID to authorize use of
	/dev/caphash

On Tue, Apr 20, 2010 at 08:28:15PM -0500, Serge E. Hallyn wrote:
> 
> Granting userid capabilities to another task is a dangerous
> privilege.  Don't just let file permissions authorize it.
> Define CAP_GRANT_ID as a new capability needed to write to
> /dev/caphash.

Isn't there some man page that also needs to be updated when you add
something like this to the user/kernel api?

thanks,

greg k-h
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