[PATCH 5.10 035/452] drm/komeda: return early if drm_universal_plane_init() fails.

[Greg Kroah-Hartman]

From: Liviu Dudau <liviu.dudau@xxxxxxx>

[ 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@xxxxxxx>
Reviewed-by: Steven Price <steven.price@xxxxxxx>
Signed-off-by: Liviu Dudau <liviu.dudau@xxxxxxx>
Link: https://lore.kernel.org/dri-devel/20211203100946.2706922-1-liviu.dudau@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/arm/display/komeda/komeda_plane.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index 98e915e325dd..a5f57b38d193 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -274,8 +274,10 @@ 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);
 
-- 
2.35.1