Fix bug on FDT nodes with compatible property

diff --git a/grub-core/bus/fdt.c b/grub-core/bus/fdt.c
index 6fb077000a57f73a72d46dae1f27a1d01352b4c2..34d535457327b2dd8ad3874ab4c6e058e54d7abc 100644 (file)
--- a/grub-core/bus/fdt.c
+++ b/grub-core/bus/fdt.c
@@ -43,6 +43,8 @@ is_compatible (struct grub_fdtbus_driver *driver,
   grub_size_t compatible_size;
   const char *compatible = grub_fdt_get_prop (dtb, node, "compatible",
                                              &compatible_size);
+  if (!compatible)
+    return 0;
   const char *compatible_end = compatible + compatible_size;
   while (compatible < compatible_end)
     {