value of GRUB_ENABLE_CRYPTODISK: util/grub-install.c instructs '1' but util/config.c expects 'y'

[TJ]

root@XPSm1530:/# grub-install /dev/sdc
Installing for i386-pc platform.
grub-install: error: attempt to install to encrypted disk without cryptodisk enabled. Set `GRUB_ENABLE_CRYPTODISK=1' in file `/etc/default/grub'.

root@XPSm1530:/# grep GRUB_ENABLE_CRYPTODISK /etc/default/grub
GRUB_ENABLE_CRYPTODISK=1

root@XPSm1530:/# apt-cache policy grub-pc
grub-pc:
  Installed: 2.02~beta2-6
  Candidate: 2.02~beta2-6
  Version table:
 *** 2.02~beta2-6 0
        500 http://gb.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
        100 /var/lib/dpkg/status

The message give incorrect information about the value to be assigned.

# grep -A 4 '!config\.is_cryptodisk_enabled' util/grub-install.c
  if (!config.is_cryptodisk_enabled && have_cryptodisk)
    grub_util_error (_("attempt to install to encrypted disk without cryptodisk enabled. "
                       "Set `%s' in file `%s'."), "GRUB_ENABLE_CRYPTODISK=1",
                     grub_util_get_config_filename ());

It appears to assume that any boolean-like value is acceptable, whereas the configuration scanner only looks for 'y'.

# grep -A5 GRUB_ENABLE_CRYPTODISK util/config.c
      if (grub_strncmp (ptr, "GRUB_ENABLE_CRYPTODISK=",
                        sizeof ("GRUB_ENABLE_CRYPTODISK=") - 1) == 0)
        {
          ptr += sizeof ("GRUB_ENABLE_CRYPTODISK=") - 1;
          if (*ptr == '"' || *ptr == '\'')
            ptr++;
          if (*ptr == 'y')
            cfg->is_cryptodisk_enabled = 1;
          continue;

[TJ (tj)]

I cannot add the upstream bug-report link since it is classified as "Security". Here's the link manually:

https://savannah.gnu.org/bugs/index.php?41524

Upstream responds: "Was already fixed in master."

[TJ (tj)]

Still affects 15.10 Wily

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Marcus Tomlinson (marcustomlinson)]

This issue has sat incomplete for more than 60 days now. I'm going to close it as invalid. Please feel free re-open if this is still an issue for you. Thank you.