From: Matt Mackall <mpm@selenic.com>
To: "Theodore Ts'o" <tytso@mit.edu>
Cc: linux-kernel@vger.kernel.org, akpm@osdl.org
Subject: Re: [PATCH] [4/4] /dev/random: Remove RNDGETPOOL ioctl
Date: Tue, 24 Aug 2004 16:26:37 -0500 [thread overview]
Message-ID: <20040824212637.GI5414@waste.org> (raw)
In-Reply-To: <E1By1St-0001TS-Qj@thunk.org>
On Fri, Aug 20, 2004 at 12:57:23AM -0400, Theodore Ts'o wrote:
>
> Recently, someone has kvetched that RNDGETPOOL is a "security
> vulnerability". Never mind that it is superuser only, and with
> superuser privs you could load a nasty kernel module, or read the
> entropy pool out of /dev/mem directly, but they are nevertheless still
> spreading FUD.
While such concerns are a bit exaggerated, the ioctl isn't in fact
very useful: it only gets one of the pools. In other words, it's been
obsolete even for debugging purposes since we went to two pools.
The pool resize ioctl is still racy in a painful way and ought to be
axed as well.
--
Mathematics is the supreme nostalgia of our time.
prev parent reply other threads:[~2004-08-24 21:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-20 4:57 [PATCH] [4/4] /dev/random: Remove RNDGETPOOL ioctl Theodore Ts'o
2004-08-24 21:26 ` Matt Mackall [this message]
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