[Bug 2099811] Re: Os-prober segmentation fault one message for each partition on same PC

[Maxime Bélair]

The profile below should fix this issue on Plucky. You can copy this
file in /etc/apparmor.d/os-prober and load it with sudo apparmor_parser
-r /etc/apparmor.d/os-prober

If you face any issue with this profile don't hesitate to give feedback.

```
#------------------------------------------------------------------
#    Copyright (C) 2025 Canonical Ltd.
#
#    Author: Maxime Bélair <maxime.belair at canonical.com>
#
#    This program is free software; you can redistribute it and/or
#    modify it under the terms of version 2 of the GNU General Public
#    License published by the Free Software Foundation.
#------------------------------------------------------------------
# vim: ft=apparmor

abi <abi/4.0>,

include <tunables/global>

profile os-prober /usr/bin/os-prober flags=(attach_disconnected) {
  include <abstractions/base>

  capability dac_override dac_read_search sys_admin sys_module
sys_rawio,

  mount options=(rprivate, rw),
  mount options=(rw, nosuid, nodev),
  umount,

  mqueue getattr,

  # os-prober uses a lot of dependencies (dash, find, grep, head, kmod, ...)
  # We allow everything in /usr/bin to avoid breakages on dependency updates
  file /usr/bin/** ix,

  file /usr/lib/os-probes/** ix,

  file /usr/sbin/blkid ix,
  file /usr/sbin/lvm ix,
  file /usr/sbin/grub-probe ix,

  # os-prober may read the whole filesystem
  file /{,**} r,

  file /dev/fuse w,
  file /dev/mapper/control w, 
  file /run/blkid/blkid.* wl,
  file /run/lock/lvm/* wk,
  file /run/lvm/hints wk,
  file /run/blkid/blkid.* wl,
  file /tmp/os-prober.*/{,**} w,
  file /var/lib/os-prober/mount/ w,
  file /var/lib/os-prober/labels wl,  


  userns,

}
```

-- 
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https://bugs.launchpad.net/bugs/2099811

Title:
  Os-prober segmentation fault one message for each partition on same PC

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

Bug description:
  Reporting this bug on os-prober, my bug https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/2099662
  was incorrectly attributed to grub

  corrado at corrado-n3-pp-0223:~$ sudo os-prober
  [sudo] password for corrado: 
  find: Failed to restore initial working directory: /home/corrado: Permission denied
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  Segmentation fault
  corrado at corrado-n3-pp-0223:~$ 

  Attaching related journal

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: os-prober 1.83ubuntu2
  ProcVersionSignature: Ubuntu 6.12.0-15.15-generic 6.12.11
  Uname: Linux 6.12.0-15-generic x86_64
  ApportVersion: 2.31.0+git20250220-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Feb 23 15:46:27 2025
  InstallationDate: Installed on 2025-02-23 (0 days ago)
  InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Daily amd64 (20250223)
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: os-prober
  UpgradeStatus: No upgrade log present (probably fresh install)

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