linux-kernel - Re: [patch 00/13] devtmpfs patches

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]

Date:	Mon, 11 May 2009 14:13:32 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Peter Zijlstra <peterz@...radead.org>,
	Greg KH <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Fabio Comolli <fabio.comolli@...il.com>,
	Greg KH <greg@...ah.com>, linux-kernel@...r.kernel.org
Subject: Re: [patch 00/13] devtmpfs patches

Kay Sievers <kay.sievers@...y.org> writes:

> On Mon, May 11, 2009 at 18:40, Eric W. Biederman <ebiederm@...ssion.com> wrote:
>> The goal for kernel compile options is that they do not affect the
>> kernels behavior.  The behavior in devmtmpfs clearly does not match
>> that rule.  The kernel acts very different with it compiled in
>> and with it not compiled in. So that section of the code deserves.
>
> It's the same as with any other option, like the ones that enable
> dynamic minors.

No it's not.

The practical goal is that a distribution can enable essentially every feature
in the kernel and not be forced to use one.

The most similar example I can think of is the dhcp client in the kernel.
Even when compiled in only if you enable it on the command line (aka ip=dhcp)
does it enable and attempt to network boot.

Mouting on /dev might be sane if it was enabled by a kernel command line option.
By default it is wrong.

Dynamic minors is right on that hairy edge.  I'm puzzled know why we
can't have the first N devices use the static assignment and the rest
of the devices use the dynamic minors.

Eric
--
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/