linux-kernel - Re: [PATCH v2] block: silently forbid sending any ioctl to a partition

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]

Message-ID: <7c7b840c-8df2-bbf9-cf43-e973971609a6@kernel.dk>
Date:   Wed, 10 Jan 2018 12:30:58 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org
Cc:     hch@...radead.org
Subject: Re: [PATCH v2] block: silently forbid sending any ioctl to a
 partition

On 1/10/18 8:54 AM, Paolo Bonzini wrote:
> After the first few months, the message has not led to many bug reports.
> It's been almost five years now, and in practice the main source of
> it seems to be MTIOCGET that someone is using to detect tape devices.
> While we could whitelist it just like CDROM_GET_CAPABILITY, this patch
> just removes the message altogether.
> 
> The patch also removes the "safe but not very useful" ioctl whitelist,
> as suggested by Christoph.  I doubt anything is using most of those
> ioctls _in general_, let alone on a partition.

Applied, thanks.

-- 
Jens Axboe