This bug was fixed in the package apparmor - 4.0.1really4.0.1-0ubuntu2
---------------
apparmor (4.0.1really4.0.1-0ubuntu2) oracular; urgency=medium
* Drop patch that enables bwrap profile
- d/p/u/enable-bwrap-profile.patch (LP: #2072811)
* d/apparmor.install
- remove bwrap-userns-restrict
* d/apparmor.maintscript: rm_conffile of bwrap-userns-restrict in
/etc/apparmor.d/ to properly revert conffiles introduced in
4.0.1-0ubuntu1
* d/apparmor-profiles.install
- install new profile
- bwrap-userns-restrict
* Drop patch that moves wike profile from apparmor to apparmor.d so it's
done by d/apparmor.install. The patch caused a warning from dpkg-source
because it didn't contain a diff
* d/apparmor.install
- install new profile
- wike - changed installation from apparmor to apparmor.d
* Add patches that fix regression tests when they run on a mounted /tmp
in tmpfs
- d/p/u/tests-refactor-logic-that-makes-mntpoint-private-for.patch
- d/p/u/tests-remount-tmpdir-as-private-instead-of.patch
- d/p/u/tests-enable-swap-test-when-tmp-is-tmpfs.patch
- d/p/u/test-detect-if-setuid-environ-test-in-running-under-.patch
-- Georgia Garcia <georgia.gar...@canonical.com> Tue, 16 Jul 2024
14:33:39 -0300
** Changed in: apparmor (Ubuntu Oracular)
Status: Triaged => Fix Released
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https://bugs.launchpad.net/bugs/2072811
Title:
Apparmor: New update broke flatpak with `apparmor="DENIED"`
Status in apparmor package in Ubuntu:
Fix Released
Status in apparmor source package in Noble:
Fix Released
Status in apparmor source package in Oracular:
Fix Released
Bug description:
The recent apparmor update appear to have broken some flatpak's ability to
save file, e.g.:
- org.keepassxc.KeePassXC
- org.ksnip.ksnip
It seems update introduced a new profile ("/etc/apparmor.d/bwrap-
userns-restrict"), which is causing the issue below.
**** To reproduce ****
(I'm using KeepassXC as example, but same issue for ksnip):
1. Install and run KeepassXC
```bash
flatpak install org.keepassxc.KeePassXC
flatpak run org.keepassxc.KeePassXC
```
2. Got error: "Access error for config file
/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/keepassxc.ini"
Looking at `journalctl -f`, I see these apparmor DENIED entries:
```txt
Jul 12 09:44:36 ubuntu2404 systemd[2144]: Started
app-flatpak-org.keepassxc.KeePassXC-4010.scope.
Jul 12 09:44:37 ubuntu2404 kernel: kauditd_printk_skb: 6 callbacks suppressed
Jul 12 09:44:37 ubuntu2404 kernel: audit: type=1400
audit(1720741477.106:310): apparmor="DENIED" operation="link" class="file"
info="Failed name lookup - deleted entry" error=-2 profile="bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317211"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
Jul 12 09:44:37 ubuntu2404 kernel: audit: type=1400
audit(1720741477.106:311): apparmor="DENIED" operation="link" class="file"
profile="bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/keepassxc.ini"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
target="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317211"
Jul 12 09:44:37 ubuntu2404 kernel: audit: type=1400
audit(1720741477.106:312): apparmor="DENIED" operation="link" class="file"
info="Failed name lookup - deleted entry" error=-2 profile="unpriv_bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317211"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
Jul 12 09:44:37 ubuntu2404 kernel: audit: type=1400
audit(1720741477.106:313): apparmor="DENIED" operation="link" class="file"
profile="unpriv_bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/keepassxc.ini"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
target="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317211"
Jul 12 09:44:37 ubuntu2404 kernel: audit: type=1400
audit(1720741477.341:314): apparmor="DENIED" operation="link" class="file"
info="Failed name lookup - deleted entry" error=-2 profile="bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317214"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
Jul 12 09:44:37 ubuntu2404 kernel: audit: type=1400
audit(1720741477.341:315): apparmor="DENIED" operation="link" class="file"
profile="bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/keepassxc.ini"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
target="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317214"
Jul 12 09:44:37 ubuntu2404 kernel: audit: type=1400
audit(1720741477.341:316): apparmor="DENIED" operation="link" class="file"
info="Failed name lookup - deleted entry" error=-2 profile="unpriv_bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317214"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
Jul 12 09:44:37 ubuntu2404 kernel: audit: type=1400
audit(1720741477.341:317): apparmor="DENIED" operation="link" class="file"
profile="unpriv_bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/keepassxc.ini"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
target="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317214"
Jul 12 09:44:38 ubuntu2404 kernel: audit: type=1400
audit(1720741478.704:318): apparmor="DENIED" operation="link" class="file"
info="Failed name lookup - deleted entry" error=-2 profile="bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317217"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
Jul 12 09:44:38 ubuntu2404 kernel: audit: type=1400
audit(1720741478.704:319): apparmor="DENIED" operation="link" class="file"
profile="bwrap"
name="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/keepassxc.ini"
pid=4021 comm="keepassxc" requested_mask="l" denied_mask="l" fsuid=1000
ouid=1000
target="/home/****/.var/app/org.keepassxc.KeePassXC/config/keepassxc/#317217"
```
**** Workaround ****
For now, work-around is by disabling "/etc/apparmor.d/bwrap-userns-
restrict" profile.
```bash
sudo aa-disable /usr/bin/bwrap
```
**** Version info ****
$ lsb_release -rd
No LSB modules are available.
Description: Ubuntu 24.04 LTS
Release: 24.04
$ apt-cache policy apparmor
apparmor:
Installed: 4.0.1-0ubuntu0.24.04.2
Candidate: 4.0.1-0ubuntu0.24.04.2
Version table:
*** 4.0.1-0ubuntu0.24.04.2 500 (phased 70%)
500 http://au.archive.ubuntu.com/ubuntu noble-updates/main amd64
Packages
100 /var/lib/dpkg/status
4.0.0-beta3-0ubuntu3 500
500 http://au.archive.ubuntu.com/ubuntu noble/main amd64 Packages
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