16.04, amavisd-new can't check rar using rar

[sles]

Hello!

I run ubuntu 16.04 server with amavisd-new.
Today I found that amavisd-new can't check attachments using rar or unrar-nonfree.

If file has only latin characters then message arrives UNCHECKED,
if it has cyrillic in utf-8 then rar or unrar exits with exit code and message passes without any warnings.
unrar-free works, but it doesn't support current formats...

Could you, please, fix this?

Thank you!

[sles (slesru)]

Patch from https://lists.amavis.org/pipermail/amavis-users/2017-September/005074.html
solved part of problems- now it works for archives with latin files in it,
but still problems with cyrillic (utf8) names- messages passes UNCHECKED...

[sles (slesru)]

https://lists.amavis.org/pipermail/amavis-users/2017-November/005132.html

Well, I were wrong, patch from above changes this to UNCHECKED

But this means really unchecked while it is possible to read files list and block by attachement...

[Christian Ehrhardt  (paelzer)]

Hi sles,
Thank you for taking the time to report this bug and helping to make Ubuntu better. I appreciate the quality of this bug report and I'm sure it'll be helpful to others experiencing the same issue.

I think you already did the right thing by engaging with upstream on this as in [1].
I can only encourage to go on with that path or one will end up with an un-maintainable delta.

This sounds like an upstream bug to me. If this is confirmed as an upstream bug, the best route to getting it fixed in Ubuntu in this case would be to pull and backport fixes once available there. Otherwise, I'm not sure what we can do directly in Ubuntu to fix the problem without the high risk of getting incompatible.

If you do end up filing an upstream bug, please link to it from here. Although as I find in [1] there isn't a real bug tracker - so the ML links you had are likely all we get.
You might update here once one of them resolve.

You might also want to report to Debian as well to make them aware and link that bug here - but they very likely would have the same position on this.

[1]: https://www.ijs.si/software/amavisd/#faq-trouble
Related: bug 1676805