linux-kernel - Re: [ linus-git ] prctl(PR_SET_KEEPCAPS, ...) is broken for some configs, e.g. CONFIG_SECURITY

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Date:	Sun, 08 Jun 2008 15:34:44 -0700
From:	Andrew Morgan <morgan@...nel.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	"Serge E. Hallyn" <serue@...ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [ linus-git ] prctl(PR_SET_KEEPCAPS, ...) is broken for some
 configs, e.g. CONFIG_SECURITY_SELINUX

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What do people think about comment #8 from Stephen Smalley?:

The dummy module is generally in the untenable position of having to lie
to userspace or break the existing capability-related system call
interface.  It should just go away, and make capability the default
module (w/ stubs for the rest of the LSM hooks as with dummy).  Then
CONFIG_SECURITY=n will yield the same result as CONFIG_SECURITY=y w/o
any further options.

Cheers

Andrew

Andrew Morton wrote:
| On Sun, 08 Jun 2008 08:10:26 -0700 Andrew Morgan <morgan@...nel.org>
wrote:
|
|> Nacked-by: Andrew G. Morgan <morgan@...nel.org>
|>
|> In a configuration in which you are not using capabilities, what is the
|> "keep capabilities" operation supposed to do? Lie to you?
|>
|> http://bugzilla.kernel.org/show_bug.cgi?id=10748
|
| I totally agree with comment 11 there. Quite a number of people have
already
| hit this and more surely will.  How can we help them (and hence us)?
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