drm/komeda: Add check for komeda_get_layer_fourcc_list()

commit 79fc672a092d93a7eac24fe20a571d4efd8fa5a4 upstream.

Add check for the return value of komeda_get_layer_fourcc_list()
to catch the potential exception.

Fixes: 5d51f6c0da1b ("drm/komeda: Add writeback support")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://lore.kernel.org/r/20241219090256.146424-1-haoxiang_li2024@163.com
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
index ebccb74306a765d524401c5fbbad32439366fbcb..f30b3d5eeca5c5f734566f326cb429a25c371bc0 100644 (file)
--- a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
@@ -160,6 +160,10 @@ static int komeda_wb_connector_add(struct komeda_kms_dev *kms,
        formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
                                               kwb_conn->wb_layer->layer_type,
                                               &n_formats);
+       if (!formats) {
+               kfree(kwb_conn);
+               return -ENOMEM;
+       }
 
        err = drm_writeback_connector_init(&kms->base, wb_conn,
                                           &komeda_wb_connector_funcs,