Bug 2379760

Summary:	Unprivileged containers fails to start after upgrade to 6.0.4-1
Product:	[Fedora] Fedora	Reporter:	Allan <3wcq6pxz>
Component:	lxc	Assignee:	Thomas Moschny <thomas.moschny>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	41	CC:	admiller, thomas.moschny
Target Milestone:	---	Keywords:	Regression, Upgrades, Upstream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	lxc-6.0.4-3.fc43 lxc-6.0.4-3.fc42 lxc-6.0.4-3.fc41	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2025-07-13 14:47:45 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Allan 2025-07-13 13:40:52 UTC

After upgrading lxc from 6.0.3-1.fc41 to 6.0.4-1.fc41, unprivileged containers fails to start with the following error appearing in LXC logs:

ERROR    start - ../src/lxc/start.c:lxc_spawn:1832 - Permission denied - Failed to preserve net namespace

Reproducible: Always

Steps to Reproduce:
1. Create a new unprivileged lxc (lxc-create --name lxc-debian --template download)
2. Try to start it (lxc start --foreground lxc-debian)
Actual Results:
LXC fails to start, returning the error "start - ../src/lxc/start.c:lxc_spawn:1832 - Permission denied - Failed to preserve net namespace"

Expected Results:
Unprivileged containers should start normally.

Additional Information:
This issue started after a lxc package upgrade. F41 with lxc version 6.0.3-1.fc41 do not fails to start unprivileged containers.

It seems that this issue was discussed with the upstream maintainers:
- https://discuss.linuxcontainers.org/t/unprivileged-container-used-to-run-after-update-error-wait-on-daemonized-start-837-received-container-state-aborting-instead-of-running/23478
- https://github.com/lxc/lxc/issues/4556
- https://github.com/lxc/lxc/pull/4536

Comment 1 Fedora Update System 2025-07-13 14:43:22 UTC

FEDORA-2025-03a09c556a (lxc-6.0.4-3.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-03a09c556a

Comment 2 Fedora Update System 2025-07-13 14:47:45 UTC

FEDORA-2025-03a09c556a (lxc-6.0.4-3.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 3 Fedora Update System 2025-07-13 15:32:39 UTC

FEDORA-2025-c0730a899d (lxc-6.0.4-3.fc41) has been submitted as an update to Fedora 41.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-c0730a899d

Comment 4 Fedora Update System 2025-07-13 15:32:40 UTC

FEDORA-2025-211196cddc (lxc-6.0.4-3.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-211196cddc

Comment 5 Fedora Update System 2025-07-14 02:35:05 UTC

FEDORA-2025-211196cddc has been pushed to the Fedora 42 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-211196cddc`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-211196cddc

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2025-07-14 22:51:03 UTC

FEDORA-2025-c0730a899d has been pushed to the Fedora 41 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-c0730a899d`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-c0730a899d

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2025-07-21 01:01:39 UTC

FEDORA-2025-211196cddc (lxc-6.0.4-3.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2025-07-21 01:18:27 UTC

FEDORA-2025-c0730a899d (lxc-6.0.4-3.fc41) has been pushed to the Fedora 41 stable repository.
If problem still persists, please make note of it in this bug report.