linux-kernel - Re: 2.6.24-rc1-gb4f5550 oops

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] [day] [month] [year] [list]

Message-ID: <20071114174840.GA14193@tv-sign.ru>
Date:	Wed, 14 Nov 2007 20:48:40 +0300
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Grant Wilson <grant.wilson@....co.uk>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.24-rc1-gb4f5550 oops

On 11/14, Srivatsa Vaddagiri wrote:
>
> On Wed, Nov 14, 2007 at 06:17:08PM +0300, Oleg Nesterov wrote:
> > Suppose that old user_struct/task_group is freed/reused, and the task does
> 
> Shouldn't this old user actually be the root user_struct?

Well, the S_ISUID application can switch ->user from !root_user (note that
setuid exec doesn't change ->user), and we also have CAP_SETUID...

But yes, I agree, this all is very unlikely.

Oleg.

-
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/