script/execute: Fix NULL dereference in grub_script_execute_cmdline()

Signed-off-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

diff --git a/grub-core/script/execute.c b/grub-core/script/execute.c
index ce83edd4b1fe5f22f571fba2416c036151a168bb..3ad468fcea6695e93f3c9189a298360e2c4374cd 100644 (file)
--- a/grub-core/script/execute.c
+++ b/grub-core/script/execute.c
@@ -940,7 +940,7 @@ grub_script_execute_cmdline (struct grub_script_cmd *cmd)
   struct grub_script_argv argv = { 0, 0, 0 };
 
   /* Lookup the command.  */
-  if (grub_script_arglist_to_argv (cmdline->arglist, &argv) || ! argv.args[0])
+  if (grub_script_arglist_to_argv (cmdline->arglist, &argv) || ! argv.args || ! argv.args[0])
     return grub_errno;
 
   for (i = 0; i < argv.argc; i++)