In hx83102_get_modes(), the return value of drm_mode_duplicate()
is assigned to mode, which will lead to a possible NULL pointer
dereference on failure of drm_mode_duplicate(). Even though a
small allocation failing is basically impossible, kernel policy
is still to check for NULL so add the check.
Fixes: 0ef94554dc40 ("drm/panel: himax-hx83102: Break out as separate driver")
Signed-off-by: Charles Han <hanchunchao@xxxxxxxxxx>
---
drivers/gpu/drm/panel/panel-himax-hx83102.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-himax-hx83102.c b/drivers/gpu/drm/panel/panel-himax-hx83102.c
index 6e4b7e4644ce..e67555323d3b 100644
--- a/drivers/gpu/drm/panel/panel-himax-hx83102.c
+++ b/drivers/gpu/drm/panel/panel-himax-hx83102.c
@@ -565,6 +565,8 @@ static int hx83102_get_modes(struct drm_panel *panel,
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, m);
+ if (!mode)
+ return -EINVAL;
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_set_name(mode);
--
2.31.1
