From: "H. Peter Anvin" <hpa@zytor.com>
To: Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
mingo@kernel.org, tglx@linutronix.de
Subject: Re: [PATCH 1/2] add helper for highmem checks
Date: Mon, 11 Feb 2013 14:46:43 -0800 [thread overview]
Message-ID: <511974D3.8020900@zytor.com> (raw)
In-Reply-To: <20130211223405.GF2683@pd.tnic>
On 02/11/2013 02:34 PM, Borislav Petkov wrote:
> On Mon, Feb 11, 2013 at 11:44:12AM -0800, H. Peter Anvin wrote:
>> Oh, craptastic. X used to hash /dev/mem to get a random seed. It
>> should have stopped that long ago, and used /dev/[u]random.
>
> That's because debian still has this WINGs window manager which hasn't
> seen any new releases since 2005: http://voins.program.ru/wdm/ and I'm
> using it because I don't want the pompous crap of the other display
> managers.
>
> But this one uses /dev/mem as a randomFile only by default - there's a
> configuration variable DisplayManager.randomFile which can be pointed
> away from /dev/mem so that's easily fixable.
>
> Mind you, I wouldnt've caught the issue if I wasn't using this ancient
> thing in its default settings :o).
>
The X server itself used to do that. Are you saying that wdm is a
*privileged process*?
-hpa
next prev parent reply other threads:[~2013-02-11 22:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-08 20:28 [PATCH 1/2] add helper for highmem checks Dave Hansen
2013-02-08 20:28 ` [PATCH 2/2] make /dev/kmem return error for highmem Dave Hansen
2013-02-08 20:48 ` H. Peter Anvin
2013-02-08 20:50 ` [PATCH 1/2] add helper for highmem checks H. Peter Anvin
2013-02-08 23:16 ` Dave Hansen
2013-02-09 9:41 ` Borislav Petkov
2013-02-09 10:47 ` Borislav Petkov
2013-02-11 17:32 ` Dave Hansen
2013-02-11 18:09 ` H. Peter Anvin
2013-02-11 18:28 ` Borislav Petkov
2013-02-11 19:44 ` H. Peter Anvin
2013-02-11 22:34 ` Borislav Petkov
2013-02-11 22:46 ` H. Peter Anvin [this message]
2013-02-11 23:00 ` Borislav Petkov
2013-02-11 23:02 ` H. Peter Anvin
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