linux-kernel - Re: [PATCH] firmware: dmi_scan: Fix UUID length safety check

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:   Tue, 10 Apr 2018 10:19:35 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Jean Delvare <jdelvare@...e.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Sasha Levin <Alexander.Levin@...rosoft.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH] firmware: dmi_scan: Fix UUID length safety check

On Mon, Apr 09, 2018 at 02:51:43PM +0200, Jean Delvare wrote:
> The test which ensures that the DMI type 1 structure is long enough
> to hold the UUID is off by one. It would fail if the structure is
> exactly 24 bytes long, while that's sufficient to hold the UUID.
> 
> I don't expect this bug to cause problem in practice because all
> implementations I have seen had length 8, 25 or 27 bytes, in line
> with the SMBIOS specifications. But let's fix it still.
> 
> Signed-off-by: Jean Delvare <jdelvare@...e.de>
> Fixes: a814c3597a6b ("firmware: dmi_scan: Check DMI structure length")
> Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>

Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>