drm/panic: Fix drawing the logo on a small narrow screen

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: 4b570ac ("drm/rect: Add drm_rect_overlap()")
Reviewed-by: Javier Martinez Canillas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jocelyn Falempe <[email protected]>

Author: Jocelyn Falempe

drivers/gpu/drm/drm_panic.c

@@ -429,6 +429,9 @@ 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);