drm/i915/display: Check source height is > 0

commit 8565c502e7c156d190d8e6d36e443f51b257f165 upstream.

The error message suggests that the height of the src rect must be at
least 1. Reject source with height of 0.

Cc: stable@vger.kernel.org
Signed-off-by: Drew Davenport <ddavenport@chromium.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221226225246.1.I15dff7bb5a0e485c862eae61a69096caf12ef29f@changeid
(cherry picked from commit 0fe76b198d482b41771a8d17b45fb726d13083cf)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
index 7cb7130434089839223054d9d61ad5db2f426454..bc523a3d1d42f978ef66d95f77e30187ea69be44 100644 (file)
--- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
+++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
@@ -1620,7 +1620,7 @@ static int skl_check_main_surface(struct intel_plane_state *plane_state)
        u32 offset;
        int ret;
 
-       if (w > max_width || w < min_width || h > max_height) {
+       if (w > max_width || w < min_width || h > max_height || h < 1) {
                drm_dbg_kms(&dev_priv->drm,
                            "requested Y/RGB source size %dx%d outside limits (min: %dx1 max: %dx%d)\n",
                            w, h, min_width, max_width, max_height);