linux-kernel - Re: Userspace regression in LTS and stable kernels

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Message-ID: <CAN1fySWPQnk26=8Qnf22Pw-N0tAFirwYs6n4uOJZ5LSH_aEuNQ@mail.gmail.com>
Date:   Wed, 13 Feb 2019 13:00:51 -0500
From:   Samuel Dionne-Riel <samuel@...nne-riel.com>
To:     linux-kernel@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, graham@...hamc.com
Subject: Re: Userspace regression in LTS and stable kernels

Sorry, had an issue when sending the e-mail and lost a bit of context
at the end, here's the missing bit:

---
[...]

Note: I wish to be CC'ed for answers and comments as I am not
subscribed to the mailing list, thanks.

References:

 * NixOS bug 53672, https://github.com/NixOS/nixpkgs/issues/53672
 * Bug 202497, https://bugzilla.kernel.org/show_bug.cgi?id=202497

Thanks,

On 13/02/2019, Samuel Dionne-Riel <samuel@...nne-riel.com> wrote:
> Hi,
>
> I am posting as a representative of the NixOS Linux distribution,
> about a userspace regression on 5.0-rc* which recently was backported
> to the 4.14.99, 4.19.21 and 4.20.8 current LTS and stable versions.
> The issue has been reported to the bug tracker, bug 202497, but seems
> to have gone unnoticed by the maintainers.
>
> The issue seems to break userspace for long-standing patterns in the
> NixOS distribution, with regards to use of the shebangs.
>
> Here is an example shebang causing an issue:
>
> #! /nix/store/mbwav8kz8b3y471wjsybgzw84mrh4js9-perl-5.28.1/bin/perl
> -I/nix/store/x6yyav38jgr924nkna62q3pkp0dgmzlx-perl5.28.1-File-Slurp-9999.25/lib/perl5/site_perl
> -I/nix/store/ha8v67sl8dac92r9z07vzr4gv1y9nwqz-perl5.28.1-Net-DBus-1.1.0/lib/perl5/site_perl
> -I/nix/store/dcrkvnjmwh69ljsvpbdjjdnqgwx90a9d-perl5.28.1-XML-Parser-2.44/lib/perl5/site_perl
> -I/nix/store/rmji88k2zz7h4zg97385bygcydrf2q8h-perl5.28.1-XML-Twig-3.52/lib/perl5/site_perl
>
> (The shebang was artificially wrapped spaces replaced by newlines)
>
> Another contributor tracked the regression it to commit
> 8099b047ecc431518b9bb6bdbba3549bbecdc343 in the 5.0-rc* tree.
>
> I bring no particular fix to the issue, but I believe it should at
> least be fast-tracked to a revert for the stable and LTS branches, and
> since 5.0 might drop soon, a solution worked on, or possibly a revert
> until one is figured out.
>
> Thanks,
>
> --
> — Samuel Dionne-Riel
>


-- 
— Samuel Dionne-Riel