Arch Linux

Description:

When running ebtables-restore at any time, I get the following error:

Unable to update the kernel. Two possible causes:
1. Multiple ebtables programs were executing simultaneously. The ebtables
userspace tool doesn't by default support multiple ebtables programs running
concurrently. The ebtables option --concurrent or a tool like flock can be
used to support concurrent scripts that update the ebtables kernel tables.
2. The kernel doesn't support a certain ebtables extension, consider
recompiling your kernel or insmod the extension.
.

I know not more than one ebtables program is running at the same time, and I know the kernel has all extensions needed because I can run ebtables on each line of /etc/ebtables.conf manually and it works fine.

Additional info:
* package version(s) 2.0.10_4-7
* config and/or log files etc.


Steps to reproduce:

Use ebtables to add a rule like "-A FORWARD -p IPv4 -s <random mac address> --ip-src <random ipv4 address> -j ACCEPT" and set forward policy to DROP "ebtables -P FORWARD DROP", /usr/lib/systemd/scripts/ebtables save, then reboot or clear ebtables, and /usr/lib/systemd/scripts/ebtables start. you will get the error above.