linux-kernel - Re: [PATCH] virt: vbox: Implement passing requestor info to the host for VirtualBox 6.0.x

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: <20190320094601.GA30735@kroah.com>
Date:   Wed, 20 Mar 2019 10:46:01 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Michael Thayer <michael.thayer@...cle.com>,
        "Knut St . Osmundsen" <knut.osmundsen@...cle.com>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] virt: vbox: Implement passing requestor info to the host
 for VirtualBox 6.0.x

On Wed, Mar 20, 2019 at 10:35:19AM +0100, Hans de Goede wrote:
> VirtualBox 6.0.x has a new feature where the guest kernel driver passes
> info about the origin of the request (e.g. userspace or kernelspace) to
> the hypervisor.
> 
> If we do not pass this information then when running the 6.0.x userspace
> guest-additions tools on a 6.0.x host, some requests will get denied
> with a VERR_VERSION_MISMATCH error, breaking vboxservice.service and
> the mounting of shared folders marked to be auto-mounted.
> 
> This commit implements passing the requestor info to the host, fixing this.
> 
> Cc: stable@...r.kernel.org

This feels like support for a "new feature", so why would this need to
go to older kernels?

It's not our fault that vb implemented a non-backwards-compatible change
for their new release, right?  So why should we be forced to add new
features to stable kernels?

I have no problem to add this for 5.2, but not for older stuff.

thanks,

greg k-h