This bug was fixed in the package apparmor -
4.0.1really4.0.1-0ubuntu0.24.04.3
---------------
apparmor (4.0.1really4.0.1-0ubuntu0.24.04.3) noble; urgency=medium
* Revert to version 4.0.1-0ubuntu0.24.04.2 except for the patch
that enables the bwrap-userns-restrict profile (LP: #2072811).
* New upstream release.
(LP: #2064672, LP: #2046844, LP: #2060100, LP: #2056297)
* Drop patches which have now been applied upstream
- d/p/u/parser-fix-issues-appointed-by-coverity.patch
- d/p/u/profiles-add-unconfined-profile-for-tuxedo-control-c.patch
- d/p/u/parser-support-uin128_t-key-as-a-pair-of-uint64_t-nu.patch
- d/p/u/Minor-improvements-for-MountRule.patch
* Add patch to add balena-etcher profile (LP: #2046844)
- d/p/u/profiles-add-unconfined-balena-etcher-profile.patch
* Add upstream patch to relax mount rules to fix use of virtiofs and
other file-system types
- d/p/u/mountrule-relaxing-constraints-on-fstype.patch
* Refresh
- d/p/u/samba-systemd-interaction.patch
- d/p/u/parser-add-support-for-prompting.patch
- Add condition in policydb serialization to only encode xtable if
kernel_supports_permstable32
* Fix d/p/u/userns-runtime-disable.patch to work when
kernel.apparmor_restrict_unprivileged_userns does not exist by adding
-e to sysctl.
* d/apparmor-profiles.install
- install new profile
- unshare-userns-restrict
- bwrap-userns-restrict
* d/apparmor.install
- install new profiles
- wike - changed installation from apparmor to apparmor.d
- foliate
- balena-etcher
- transmission
* d/control: Remove obsolete lsb-base Depends and swap pkg-config to
pkgconf for Build-Depends
-- Georgia Garcia <georgia.gar...@canonical.com> Thu, 18 Jul 2024
15:28:46 -0300
** Changed in: apparmor (Ubuntu Noble)
Status: Fix Committed => 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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