| Message ID | 20241111-uninitializedpointer1601557-v1-1-7d03668e8141@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | drm/mediatek: Initialize pointer before use to avoid undefiend behaviour | expand |
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index 9a8ef8558da9..bc06c664e80f 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -900,7 +900,7 @@ static int mtk_drm_of_ddp_path_build_one(struct device *dev, enum mtk_crtc_path const unsigned int **out_path, unsigned int *out_path_len) { - struct device_node *next, *prev, *vdo = dev->parent->of_node; + struct device_node *next = NULL, *prev, *vdo = dev->parent->of_node; unsigned int temp_path[DDP_COMPONENT_DRM_ID_MAX] = { 0 }; unsigned int *final_ddp_path; unsigned short int idx = 0;
Initialize the pointer with NULL as mtk_drm_of_get_ddp_ep_cid function might return before assigning value to next pointer but yet further dereference to next can lead to some undefined behavior as it may point to some invalid location. Fixes: 4c932840db1d ("drm/mediatek: Implement OF graphs support for display paths") Signed-off-by: Karan Sanghavi <karansanghvi98@gmail.com> --- Coverity Message: CID 1601557: (#1 of 1): Uninitialized pointer read (UNINIT) 3. uninit_use: Using uninitialized value next. Coverity Link: https://scan7.scan.coverity.com/#/project-view/10043/11354?selectedIssue=1601557 --- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- base-commit: 6d59cab07b8d74d0f0422b750038123334f6ecc2 change-id: 20241111-uninitializedpointer1601557-9803b725b6bd Best regards,