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  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:	Thu, 19 Mar 2015 10:43:14 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] eeprom: at24: Add support for large EEPROMs connected to
 SMBus adapters

On Thu, Mar 19, 2015 at 09:16:21AM +0100, Wolfram Sang wrote:
> 
> > I don't call that multi-master, though, so I guess we may have a bit of a
> > terminology problem.
> 
> This is definately not a multi-master issue, I agree. It is just
> another issue I saw when thinking about your patch thoroughly again.
> 
> > I'll see what I can come up with, but I am not sure if I'll find the time
> > before the 4.1 commit window opens. Company has a working solution (kind of),
> > so now I'll have to do this on my own time ;-).
> 
> But their solution is buggy and needs a fix! :)
> 
Turns out this is really easy to reproduce. One process reads
the eeprom over and over again, another runs i2cdump in a loop,
and voila ... lots of corruptions. Scary, especially considering
how wide-spread this kind of i2c access is in the kernel.

Guenter
--
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/

Powered by blists - more mailing lists