k3s-rootless.service not starting up

[flixman]

Environmental Info:
K3s Version:
k3s version v1.32.0+k3s1 (cca8fac)
go version go1.23.3

Node(s) CPU architecture, OS, and Version:
Linux ubuntu 6.8.0-55-generic #57-Ubuntu SMP PREEMPT_DYNAMIC Wed Feb 12 23:42:21 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Cluster Configuration:
1 master

Describe the bug:
Starting the k3s-rootless service results in the message "failed to start the child: fork/exec /proc/self/exe: operation not permitted"

Steps To Reproduce:

• Installed K3s: as root user, executed "curl -sfL https://get.k3s.io | sh - > master_setup.log"
• Enabled lingering and delegation for the user
• Downloaded the file k3s-rootless.service to user systemd/user folder
• reload the systemd daemon, and started the service

Expected behavior:
k3s gets started running as an unprivileged user

Actual behavior:
k3s refuses to start

Additional context / logs:

[brandond]

I am unable to reproduce this. Rootless is also working correctly in our CI tests.

I suspect you have selinux or some other security module in place. Check the audit logs and figure out what is preventing this process from forking/re-execing.