linux-kernel - Re: [PATCH 3/6] drm/panic: Fix qr_code, ensure vmargin is positive

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Message-ID: <87cy6qq6lh.fsf@ocarina.mail-host-address-is-not-set>
Date: Tue, 14 Oct 2025 09:34:50 +0200
From: Javier Martinez Canillas <javierm@...hat.com>
To: Jocelyn Falempe <jfalempe@...hat.com>, Maarten Lankhorst
 <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Jocelyn Falempe <jfalempe@...hat.com>,
 linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Cc: stable@...r.kernel.org
Subject: Re: [PATCH 3/6] drm/panic: Fix qr_code, ensure vmargin is positive

Jocelyn Falempe <jfalempe@...hat.com> writes:

> Depending on qr_code size and screen size, the vertical margin can
> be negative, that means there is not enough room to draw the qr_code.
>
> So abort early, to avoid a segfault by trying to draw at negative
> coordinates.
>
> Fixes: cb5164ac43d0f ("drm/panic: Add a QR code panic screen")
> Signed-off-by: Jocelyn Falempe <jfalempe@...hat.com>
> ---

Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat