From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6DF79C282C2 for ; Wed, 13 Feb 2019 17:57:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3847C2075C for ; Wed, 13 Feb 2019 17:57:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=dionne-riel-com.20150623.gappssmtp.com header.i=@dionne-riel-com.20150623.gappssmtp.com header.b="Ns7tvNi0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391631AbfBMR5j (ORCPT ); Wed, 13 Feb 2019 12:57:39 -0500 Received: from mail-lf1-f68.google.com ([209.85.167.68]:33356 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728112AbfBMR5j (ORCPT ); Wed, 13 Feb 2019 12:57:39 -0500 Received: by mail-lf1-f68.google.com with SMTP id q12so2510114lfm.0 for ; Wed, 13 Feb 2019 09:57:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dionne-riel-com.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to:cc :content-transfer-encoding; bh=VAjY+/bIOpJdGWQMH2R7x+05QKpXxteV+S4zLK9ofRU=; b=Ns7tvNi0mZKdMDFfhbnN/LG2kICzb5lka48fhvM6pU70hzoEaF5BHmlDYiE8HR6vzT of3DgJY8+lGSSjUZ89luR17Y3/Ja4w0JIcEFJ9AfCEFbTn2KcYci5N2f0W9L7Ho235Xz WRmvgdfqsZ1nBGXWgKPjAI/W+eryl/6nG//z9ytCkspXIlbKYo051KE+CLAwVr3gBVBl BiVG+rqR7yoEtmc76lECHc0eTHM0N4SdaG+3rUeqzC9omUdvLtzkKQQ/rKAfQA0LGNvH iFwGpSU2o/zFY8tFlx9Cxkg9pmu1hGzC+i2CP5aXeGygJZ++xj8OH9hfU/dpJwXV7d7t XzsA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc :content-transfer-encoding; bh=VAjY+/bIOpJdGWQMH2R7x+05QKpXxteV+S4zLK9ofRU=; b=C+hiBAGec3bhQMv6Ag9oQhcCnKP8887634dr7vrJ6D6akGNRY/I43DA7wls3YI4aVL 5+DqCYvfR4UQqg2isgwloECaFuOs9IBhWwAT+gvEDCc3j7dXbkCQhe9+Rn1kXQmPsX19 flLJ5UR5O7H8eLhG49sl9lT1020HMPD/o1R646QZrJa2nWr8UBdlzdsvVwYdlQBBH74l JwimieUGxsSlDekE3YAP/FOQ7yh3ESczUBFa8WvrIKO79SQh1qCfftQn+vPYnh+Sxtyn ROaLoe0/fjBnL6Vs8Mg7CV8ko53BxiPno2rPFKTrUbACmnS2bceP/k60yjFkKHIqkRsX 8flQ== X-Gm-Message-State: AHQUAuZkBBi4DiPKR9nIMjEOhdL79789yFIc/JGft8ZYFjqQZxNk3VdI UbH3yqCHYveJqRZ7ckBLe7GBvMCN0O5vFZ9NGoMxk+1X X-Google-Smtp-Source: AHgI3IZGneiKDOMs/7Mwr1X+5YTuv6nRuVhxpqyuMKsB/BW0BRTIiDFgSu5aMfpwJCs5GTxooILLAuQddeyYutQFTxc= X-Received: by 2002:a19:5013:: with SMTP id e19mr1036562lfb.89.1550080656243; Wed, 13 Feb 2019 09:57:36 -0800 (PST) MIME-Version: 1.0 Received: by 2002:ab3:5612:0:0:0:0:0 with HTTP; Wed, 13 Feb 2019 09:57:35 -0800 (PST) From: Samuel Dionne-Riel Date: Wed, 13 Feb 2019 12:57:35 -0500 Message-ID: Subject: Userspace regression in LTS and stable kernels To: linux-kernel@vger.kernel.org Cc: torvalds@linux-foundation.org, graham@grahamc.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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/li= b/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, --=20 =E2=80=94 Samuel Dionne-Riel