Bug#1012154: binfmt-support.service errors with "unable to close /proc/sys/fs/binfmt_misc/register: File exists"

[Michael Biebl]

Am 01.06.22 um 13:18 schrieb Colin Watson:
> On Wed, Jun 01, 2022 at 11:25:21AM +0200, Michael Biebl wrote:
>> what you see here is a race condition between binfmt-support.service and
>> systemd-binfmt.service.
>> E.g. qemu installs binfmt config files for both binfmt-support and
>> systemd-binfmt leading to the issue you see.
>>
>> I plan to add a
>> ConditionFileIsExecutable=!/usr/sbin/update-binfmts
>> to systemd-binfmt.service. This will disable systemd-binfmt.service when
>> binfmt-support is installed and should mitigate this issue.
>> (thus reassigning to systemd)
> 
> Thanks for investigating that.

Thinking more about it, it might actually be preferrable, if this 
condition is shipped by binfmt-support via a drop-in config for 
systemd-binfmt.service.

This way, the condition is only evaluated when binfmt-support is 
actually installed.

I've attached a possible patch for that.

Colin, could you please review and if you agree, I'd re-assign this bug 
report back to binfmt-support.

Michael
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