linux-kernel - Re: [bug] /etc/profile: line 30: /dev/null: Permission denied (Was: Re: [PATCH] Remove broken by design and by implementation devtmpfs maintenance disaster)

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Message-ID: <ac3eb2510909171218k4963fc7dv8fb7549007e511aa@mail.gmail.com>
Date:	Thu, 17 Sep 2009 21:18:05 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg KH <greg@...ah.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [bug] /etc/profile: line 30: /dev/null: Permission denied (Was: 
	Re: [PATCH] Remove broken by design and by implementation devtmpfs 
	maintenance disaster)

On Thu, Sep 17, 2009 at 20:53, Ingo Molnar <mingo@...e.hu> wrote:
> I've reproduced a bug with the following .config options:
>
>  CONFIG_DEVTMPFS=y
>  CONFIG_DEVTMPFS_MOUNT=y
>
> /dev/null and /dev/zero are not read/writable to ordinary users,
> breaking normal bootup and login:

Udev should run long before some ordinary/non-root user can login, and
apply the permissions as it always does. It's known to work on Fedora,
SUSE, Ubuntu. What kind of system/environment/setup is that where you
see this?

Kay
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