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  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]
Date:	Sat, 27 Mar 2010 23:20:54 +0000
From:	Ben Hutchings <>
To:	François Romieu <>
Cc:	Timo Teräs <>,
	Ivan Vecera <>,
Subject: Re: r8169 mac reading/writing broken

On Sat, 2010-03-27 at 22:11 +0100, François Romieu wrote:
> Timo Teräs <> :
> [...]
> > Any ideas how to check this?
> Check the datasheet of VIA's chipset for a WC control bit - there
> ought to be one - and disable it.
> > Or is swapping MAC0/MAC4 writes, or adding the extra read an
> > acceptable fix/workaround?
> swapping should reliably disable WC. It would be fine.

This bug was also reported by a Debian user in
<>, also using a VIA chipset.

This sort of behaviour has been seen before with 64-bit registers
written in two 32-bit chunks, on some ARM platforms.  You worked around
that for the descriptor pointers with:

ommit b39fe41f481d20c201012e4483e76c203802dda7
Author: Francois Romieu <>
Date:   Mon Sep 11 20:10:58 2006 +0200

    r8169: quirk for the 8110sb on arm platform

A similar problem seems to afflict the multicast hash register on this
platform - see <>, and sorry I didn't
report this earlier when I got confirmation of my hypothesis.

I wonder whether there are special rules that need to be followed for
updating such registers and which the driver is not following, or a more
general bug in the Realtek chips that should be consistently
worked-around for all 64-bit registers.


Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

Download attachment "signature.asc" of type "application/pgp-signature" (829 bytes)

Powered by blists - more mailing lists