drm: dereference of tmp in drm_proc_create_files()

tmp allocation may fail, prevent a dereference.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_proc.c b/drivers/gpu/drm/drm_proc.c
index bbd4b3d..dc967af 100644 (file)
--- a/drivers/gpu/drm/drm_proc.c
+++ b/drivers/gpu/drm/drm_proc.c
@@ -106,6 +106,10 @@ int drm_proc_create_files(struct drm_info_list *files, int count,
                        continue;
 
                tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
+               if (tmp == NULL) {
+                       ret = -1;
+                       goto fail;
+               }
                ent = create_proc_entry(files[i].name, S_IFREG | S_IRUGO, root);
                if (!ent) {
                        DRM_ERROR("Cannot create /proc/dri/%s/%s\n",