linux-kernel - Re: [PATCH 05/10] user namespace: clamp down users of cap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20111024172842.GA13556@sergelap>
Date:	Mon, 24 Oct 2011 12:28:42 -0500
From:	"Serge E. Hallyn" <serge.hallyn@...onical.com>
To:	"Andrew G. Morgan" <morgan@...nel.org>
Cc:	"Serge E. Hallyn" <serge@...lyn.com>,
	David Howells <dhowells@...hat.com>,
	linux-kernel@...r.kernel.org, ebiederm@...ssion.com,
	akpm@...ux-foundation.org, oleg@...hat.com, richard@....at,
	mikevs@...all.net, segoon@...nwall.com, gregkh@...e.de,
	eparis@...hat.com
Subject: Re: [PATCH 05/10] user namespace: clamp down users of cap_raised

Quoting Andrew G. Morgan (morgan@...nel.org):
> Serge,
> 
> It seems as if this whole thing is really idiomatic. How about?
> 
> #define IN_ROOT_USER_NS_CAPABLE(cap)  \
>    ((current_user_ns() == &init_user_ns) && cap_raised(current_cap(), cap))

My objection to this was that it seems to encourage others to use it :)  I'm
not sure we want that.  Also, IN_ROOT_USER_NS seems more generally useful.

But if I'm the only one who feels this way I'll go ahead and do it...

thanks,
-serge
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/