linux-kernel - Re: [PATCH v3 part1 0/4] Fix SG_IO ambiguity between READ SUBCHANNEL and UNMAP (and other similar cases)

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] [day] [month] [year] [list]

Date:	Wed, 27 Aug 2014 10:47:46 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Luis Henriques <luis.henriques@...onical.com>
Cc:	Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
	tj@...nel.org
Subject: Re: [PATCH v3 part1 0/4] Fix SG_IO ambiguity between READ SUBCHANNEL
 and UNMAP (and other similar cases)

On Wed, Aug 27, 2014 at 01:08:06PM +0100, Luis Henriques wrote:
> Thanks a lot for the update, Paolo.
> 
> This is what I was actually expecting, although it's somewhat
> surprising, taking into account this is a security issue :-)

The right fix is to get rid of all the whitelisting BS and just allow
SG_IO if capable, not based on ownership checks.

With this all the problems with trying to work around the different commands
sets are gone.
--
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/