Re: testing a loopback device without filesystem causes a crash

[Robert Millan <rmh@aybabtu.com>]

On Mon, Sep 14, 2009 at 09:45:42AM +0100, Colin Watson wrote:
> On Sun, Sep 13, 2009 at 07:58:56PM +0100, ago wrote:
> > On fezie's request I am reporting a possible bug that I experienced
> > when running the following:
> > 
> > loopback loop0 /path/to/myfile
> > if [ -e (loop0)/some/file ]; then
> >  echo ok
> > fi
> > 
> > If /path/to/myfile does not contain a filesystem, grub2 crashes (there
> > is a sudden restart) when I run the test.
> 
> The following patch fixes this. OK to commit?
> 
> 2009-09-14  Colin Watson  <cjwatson@ubuntu.com>
> 
> 	* commands/test.c (get_fileinfo): Return immediately if
> 	grub_fs_probe fails.
> 
> Index: commands/test.c
> ===================================================================
> --- commands/test.c	(revision 2593)
> +++ commands/test.c	(working copy)
> @@ -88,6 +88,13 @@ test_parse (char **args, int *argn, int argc)
>        }
>  
>      fs = grub_fs_probe (dev);
> +    if (! fs)
> +      {
> +	grub_free (device_name);
> +	grub_device_close (dev);
> +	return;
> +      }
> +

Of course!

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."