[Bug 1555760] Re: Too many levels of symbolic links /proc/sys/fs/binfmt_misc

[René Jochum]

I'm also affected by this bug.

Host: Ubuntu Xenial amd64 (all updates installed)
Containers: Multiple xenial containers, one privileged Trusty container.
Affected container: Unprivileged Trusty container (privileged works fine).

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https://bugs.launchpad.net/bugs/1555760

Title:
   Too many levels of symbolic links /proc/sys/fs/binfmt_misc

Status in binfmt-support package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  At first I thought this was an LXD issue, but it turns out the issue
  is in systemd

  https://github.com/lxc/lxd/issues/1727#issuecomment-194416558

  ls -l  /proc/sys/fs/binfmt_misc  fails with error:

  Too many levels of symbolic links

  
  I restarted binfmt manually by running:

      sudo /usr/sbin/update-binfmts --disable
      sudo /usr/sbin/update-binfmts --enable

  I think using systemd to do this would have also worked:

      sudo service binfmt-support restart

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