[Bug 1259] New: Handling of EPROTONOSUPPORT in ebtables breaking Ubuntu 18.04 apt-get upgrade

bugzilla-daemon at netfilter.org bugzilla-daemon at netfilter.org
Fri Jun 1 03:03:53 CEST 2018


            Bug ID: 1259
           Summary: Handling of EPROTONOSUPPORT in ebtables breaking
                    Ubuntu 18.04 apt-get upgrade
           Product: netfilter/iptables
           Version: linux-2.6.x
          Hardware: x86_64
                OS: Ubuntu
            Status: NEW
          Severity: normal
          Priority: P5
         Component: bridging
          Assignee: netfilter-buglog at lists.netfilter.org
          Reporter: redbeardesq at outlook.com

Updating ebtables on Ubuntu 18.04 on WSL broke routine apt upgrades.

The ebtables stop script called as part of the ebtables upgrade returns an
error to apt and halts the apt upgrade.

The error seems to come from ebtables mishandling of a EPROTONOSUPPORT syscall
in communication.c in ebtables.

WSL fully supports EPROTONOSUPPORT syscalls, has since 2017.

The fix for ebtables for now has been to work around the ebtables error message
in the stop script, basically to ignore the error.

I think the long-term fix will be to fix ebtables handling of EPROTONOSUPPORT

Thank you.

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