linux-kernel - Re: BUG: setuid sometimes doesn't.

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]

Date:	Thu, 26 Feb 2009 07:06:21 -0500 (EST)
From:	Joe Malicki <jmalicki@...acarta.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Kenneth Baker <bakerkj@...acarta.com>,
	Michael Itz <mitz@...acarta.com>
Subject: Re: BUG: setuid sometimes doesn't.


----- "Joe Malicki" <jmalicki@...acarta.com> wrote:

> Very rarely, we experience a setuid program not properly getting
> the euid of its owner.
> 
> Thus far, we have only seen failures for the program being setuid
> root, being run by a non-root user, on a multi-core machine.  Trying
> to
> setuid to a user from root, *or* booting with maxcpus=1 and trying to
> setuid from a non-root user to root, both fail.

Sorry, misstated that.

setuid from nonroot->root, or with maxcpus=1, always seems to work.

Only multiple cores with setuid to root has failed for us.

-Joe Malicki
--
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/