linux-kernel - Re: [PATCH 1/2] Block layer filter

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: <SN4PR0401MB3598185077055334ADE1BB159B1C0@SN4PR0401MB3598.namprd04.prod.outlook.com>
Date:   Wed, 21 Oct 2020 09:14:56 +0000
From:   Johannes Thumshirn <Johannes.Thumshirn@....com>
To:     Sergei Shtepa <sergei.shtepa@...am.com>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "hch@...radead.org" <hch@...radead.org>,
        "darrick.wong@...cle.com" <darrick.wong@...cle.com>,
        "linux-xfs@...r.kernel.org" <linux-xfs@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "len.brown@...el.com" <len.brown@...el.com>,
        "pavel@....cz" <pavel@....cz>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "ming.lei@...hat.com" <ming.lei@...hat.com>,
        "jack@...e.cz" <jack@...e.cz>, "tj@...nel.org" <tj@...nel.org>,
        "gustavo@...eddedor.com" <gustavo@...eddedor.com>,
        "bvanassche@....org" <bvanassche@....org>,
        "osandov@...com" <osandov@...com>,
        "koct9i@...il.com" <koct9i@...il.com>,
        Damien Le Moal <Damien.LeMoal@....com>,
        "steve@....org" <steve@....org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 1/2] Block layer filter - second version

On 21/10/2020 11:04, Sergei Shtepa wrote:
> +	help
> +	  Enabling this lets third-party kernel modules intercept
> +	  bio requests for any block device. This allows them to implement

The "third-party kernel modules" part sounds a bit worrisome to me. Especially
as this functionality is based on EXPORT_SYMBOL()s without the GPL suffix.

I read it as a "allow a proprietary module to mess with bios", which is a big 
no-no to me.

Not providing any sort of changelog doesn't help much either.

Thanks,
	Johannes