linux-kernel - Re: [PATCH 2/3] xen: return xenstore command failures via response instead of rc

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] [thread-next>] [day] [month] [year] [list]

Message-ID: <cdfb649a-1fdd-ef0b-aeb1-fd12281f014f@suse.com>
Date:   Thu, 22 Dec 2016 16:55:13 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Subject: Re: [PATCH 2/3] xen: return xenstore command failures via response
 instead of rc

On 22/12/16 16:49, Boris Ostrovsky wrote:
> On 12/22/2016 02:19 AM, Juergen Gross wrote:
>> When the xenbus driver does some special handling for a Xenstore
>> command any error condition related to the command should be returned
>> via an error response instead of letting the related write operation
>> fail. Otherwise the user land handler might take wrong decisions
>> assuming the connection to Xenstore is broken.
> 
> Do we expect the user to always read the reply if no error code was
> returned?

Absolutely, yes. This is how error reporting of Xenstore is
working.


Juergen