Make sure _XROOTPMAP_ID property is right type, format and length before

[dana/xcompmgr.git] / xcompmgr.c

diff --git a/xcompmgr.c b/xcompmgr.c
index 16260b4..7b55eae 100644 (file)
--- a/xcompmgr.c
+++ b/xcompmgr.c
@@ -328,7 +328,8 @@ root_tile (Display *dpy)
 
     if (XGetWindowProperty (dpy, root, XInternAtom (dpy, "_XROOTPMAP_ID", False),
                            0, 4, False, AnyPropertyType,
-                           &actual_type, &actual_format, &nitems, &bytes_after, &prop) == Success)
+                           &actual_type, &actual_format, &nitems, &bytes_after, &prop) == Success &&
+       actual_type == XInternAtom (dpy, "PIXMAP", False) && actual_format == 32 && nitems == 1)
     {
        memcpy (&pixmap, prop, 4);
        XFree (prop);