linux-kernel - Re: [PATCH 3/3] drm/tests: Fix a use-after-free bug in __drm_kunit_helper_alloc_drm

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: <66zj2spgswo2adyhh2xbcefimggiyci2whxjhsygdistyyqvob@rot736yxggcw>
Date:   Wed, 20 Sep 2023 08:40:04 +0200
From:   Maxime Ripard <mripard@...nel.org>
To:     Arthur Grillo <arthurgrillo@...eup.net>
Cc:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Brendan Higgins <brendan.higgins@...ux.dev>,
        David Gow <davidgow@...gle.com>, tales.aparecida@...il.com,
        andrealmeid@...eup.net, mairacanal@...eup.net,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kunit-dev@...glegroups.com
Subject: Re: [PATCH 3/3] drm/tests: Fix a use-after-free bug in
 __drm_kunit_helper_alloc_drm_device()

Hi,

On Wed, Sep 20, 2023 at 03:11:38AM -0300, Arthur Grillo wrote:
> In __drm_kunit_helper_alloc_drm_device_with_driver(), a drm_driver is
> allocated with kunit_kzalloc. If the dev argument was allocated by
> drm_kunit_helper_alloc_device, its deferred actions would access the
> already deallocated drm_driver.

We already have a fix for that in drm-misc-fixes, could you give it a try?

Thanks!
Maxime

Download attachment "signature.asc" of type "application/pgp-signature" (229 bytes)