drm/komeda: return early if drm_universal_plane_init() fails.

[ Upstream commit c8f76c37cc3668ee45e081e76a15f24a352ebbdd ]

If drm_universal_plane_init() fails early we jump to the common cleanup code
that calls komeda_plane_destroy() which in turn could access the uninitalised
drm_plane and crash. Return early if an error is detected without going through
the common code.

Reported-by: Steven Price <steven.price@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://lore.kernel.org/dri-devel/20211203100946.2706922-1-liviu.dudau@arm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index d63d83800a8a3876679d6d6641a349b60f68945e..d646e3ae1a23c6140afb0ff4c9ff12a6e71526bd 100644 (file)
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -275,8 +275,10 @@ static int komeda_plane_add(struct komeda_kms_dev *kms,
 
        komeda_put_fourcc_list(formats);
 
-       if (err)
-               goto cleanup;
+       if (err) {
+               kfree(kplane);
+               return err;
+       }
 
        drm_plane_helper_add(plane, &komeda_plane_helper_funcs);