[Bug 2122633] Re: os-prober is broken (mktemp: Permission denied) on Questing due to apparmor misconfiguration

[Peter de Kraker]

My Windows install is no longer detected when updating grub due to this
issue.

Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
/usr/bin/os-prober: 25: mktemp: Permission denied
/usr/bin/os-prober: 17: cannot create /dmraid-map: Is a directory
/usr/bin/os-prober: 18: rm: Permission denied

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https://bugs.launchpad.net/bugs/2122633

Title:
  os-prober is broken (mktemp: Permission denied) on Questing due to
  apparmor misconfiguration

Status in apparmor package in Ubuntu:
  Confirmed
Status in os-prober package in Ubuntu:
  Confirmed
Status in rust-coreutils package in Ubuntu:
  Confirmed

Bug description:
  os=prober fails to function Questing.

  It appears that apparmor blocks temp directory creation (mktemp from
  rust-coreutils) in context of os-prober.

  Just renaming os-prober script to anything else allows it to function.

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