[bug #52857] grub-mkconfig_lib + GRUB_ENABLE_CRYPTODISK => empty cryptomount commands

[Raphaël Droz]

URL:
  <http://savannah.gnu.org/bugs/?52857>

                 Summary: grub-mkconfig_lib + GRUB_ENABLE_CRYPTODISK => empty
cryptomount commands
                 Project: GNU GRUB
            Submitted by: drzraf
            Submitted on: Wed 10 Jan 2018 03:23:46 PM CET
                Category: Disk &amp; Partition
                Severity: Major
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: 2.02
         Reproducibility: Every Time
         Planned Release: None

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Details:

Line 148
http://git.savannah.gnu.org/cgit/grub.git/tree/util/grub-mkconfig_lib.in#n148
```
  if [ x$GRUB_ENABLE_CRYPTODISK = xy ]; then
      for uuid in `"${grub_probe}" --device $@ --target=cryptodisk_uuid`; do
          echo "cryptomount -u $uuid"
      done
  fi
```

Howto:
* create luks volumes which are not opened
* internal partition (LVM inside luks) are not visible
* set GRUB_ENABLE_CRYPTODISK
* host system calls update-initramfs

Result:
* grub-probe returns an empty string, but the loop is going to output an
*empty* uuid.
* grub.cfg contains: "cryptomount -u"

Expected:
* not cryptomount command
* or a warning that no cryptodisk_uuid was found





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