linux-kernel - Re: UML fails to locate address space

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: <20080520173503.GA10811@c2.user-mode-linux.org>
Date:	Tue, 20 May 2008 13:35:03 -0400
From:	Jeff Dike <jdike@...toit.com>
To:	"linux-os (Dick Johnson)" <linux-os@...logic.com>
Cc:	Tom Spink <tspink@...il.com>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: UML fails to locate address space

On Tue, May 20, 2008 at 11:22:08AM -0400, linux-os (Dick Johnson) wrote:
> Does this mean that I cannot mmap() address zero in the kernel
> anymore? I should be able (in the kernel) read anything, and
> then mmap() it to something usable in user-space. If address
> zero is now artifically trapped there are problems being created
> for no good reason at all.

We're operating from userspace here.

In any case, this hasn't happened with any kernel I've seen, but I'm
suspicious that Ubuntu has started treating page zero specially.

	   	       	   Jeff

-- 
Work email - jdike at linux dot intel dot com
--
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/