6.12-stable review patch. If anyone has any objections, please let me know.
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From: Jocelyn Falempe jfalempe@redhat.com
[ Upstream commit 179753aa5b7890b311968c033d08f558f0a7be21 ]
If the logo width is bigger than the framebuffer width, and the height is big enough to hold the logo and the message, it will draw at x coordinate that are higher than the width, and ends up in a corrupted image.
Fixes: 4b570ac2eb54 ("drm/rect: Add drm_rect_overlap()") Reviewed-by: Javier Martinez Canillas javierm@redhat.com Link: https://lore.kernel.org/r/20251009122955.562888-2-jfalempe@redhat.com Signed-off-by: Jocelyn Falempe jfalempe@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/drm_panic.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c index f128d345b16df..932a54b674794 100644 --- a/drivers/gpu/drm/drm_panic.c +++ b/drivers/gpu/drm/drm_panic.c @@ -306,6 +306,9 @@ static void drm_panic_logo_rect(struct drm_rect *rect, const struct font_desc *f static void drm_panic_logo_draw(struct drm_scanout_buffer *sb, struct drm_rect *rect, const struct font_desc *font, u32 fg_color) { + if (rect->x2 > sb->width || rect->y2 > sb->height) + return; + if (logo_mono) drm_panic_blit(sb, rect, logo_mono->data, DIV_ROUND_UP(drm_rect_width(rect), 8), 1, fg_color);