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Message-ID: <b10ed22795de18c499f444e3ce8f3756@kernel.org>
Date: Tue, 30 Jun 2026 12:37:53 +0000
From: "Maxime Ripard" <mripard@kernel.org>
To: "Romain Gantois" <romain.gantois@bootlin.com>
Subject: Re: [PATCH v2 1/2] drm/logicvc: Avoid use-after-free with
 devm_kzalloc()
In-Reply-To: <20260630-logicvc-uaf-v2-1-99e881833860@bootlin.com>
References: <20260630-logicvc-uaf-v2-1-99e881833860@bootlin.com>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, "David
 Airlie" <airlied@gmail.com>, "Jason Xiang" <jx@jasonxiang.net>, "Maarten
 Lankhorst" <maarten.lankhorst@linux.intel.com>, "Maxime Ripard" <mripard@kernel.org>, "Paul
 Kocialkowski" <paul.kocialkowski@bootlin.com>, "Paul Kocialkowski" <paulk@sys-base.io>, "Simona
 Vetter" <simona@ffwll.ch>, "Thomas Petazzoni" <thomas.petazzoni@bootlin.com>, "Thomas
 Zimmermann" <tzimmermann@suse.de>
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On Tue, 30 Jun 2026 11:10:10 +0200, Romain Gantois wrote:
> The logicvc driver calls drm_universal_plane_init(),
> drm_crtc_init_with_planes(), and drm_encoder_alloc(). These functions
> should not be called with structs allocated with devm_kzalloc(), as this
> can lead to use-after-free bugs. In fact, a use-after-free caused by this
> has been observed on a v6.6 kernel.
>=20
> [ ... ]

Reviewed-by: Maxime Ripard <mripard@kernel.org>

Thanks!
Maxime