Devuan bug report logs - #497
libc6: Permission denied, intermittent in execve

Package: libc6; Maintainer for libc6 is (unknown); Source for libc6 is src:glibc.

Reported by: Alessandro Vesely <vesely@tana.it>

Date: Mon, 27 Jul 2020 08:33:01 UTC

Severity: normal

Tags: debian

Merged with 498

Found in version 2.28-10

Forwarded to https://bugs.debian.org/966343

Full log

🔗 View this message in rfc822 format

X-Loop: owner@bugs.devuan.org
Subject: bug#497: libc6: Permission denied, intermittent in execve
Reply-To: Alessandro Vesely <vesely@tana.it>, 497@bugs.devuan.org
Resent-From: Alessandro Vesely <vesely@tana.it>
Resent-To: devuan-bugs@lists.dyne.org
Resent-CC: devuan-dev@lists.dyne.org
X-Loop: owner@bugs.devuan.org
Resent-Date: Mon, 27 Jul 2020 08:33:01 +0000
Resent-Message-ID: <handler.497.B.159583861214966@bugs.devuan.org>
Resent-Sender: owner@bugs.devuan.org
X-Devuan-PR-Message: report 497
X-Devuan-PR-Package: libc6
X-Devuan-PR-Keywords: 
Received: via spool by submit@bugs.devuan.org id=B.159583861214966
          (code B); Mon, 27 Jul 2020 08:33:01 +0000
Received: (at submit) by bugs.devuan.org; 27 Jul 2020 08:30:12 +0000
Delivered-To: devuanbugs@dyne.org
Received: from tupac3.dyne.org [195.169.149.119]
	by doc.devuan.org with IMAP (fetchmail-6.4.0.beta4)
	for <debbugs@localhost> (single-drop); Mon, 27 Jul 2020 08:30:12 +0000 (UTC)
Received: from wmail.tana.it (wmail.tana.it [62.94.243.226])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by vm6.ganeti.dyne.org (Postfix) with UTF8SMTPS id 31FE6F60ACF
	for <submit@bugs.devuan.org>; Mon, 27 Jul 2020 10:25:41 +0200 (CEST)
Authentication-Results: vm6.ganeti.dyne.org;
	dkim=pass (1152-bit key; secure) header.d=tana.it header.i=@tana.it header.b="AEE32H+G";
	dkim-atps=neutral
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tana.it; s=delta;
	t=1595838339; bh=aF8WPNP4tXMGBJJ20DnID4CLBFpMF1gzxyS6WeuXFDw=;
	l=1335; h=From:To:Date;
	b=AEE32H+GsYHzy40u24EZvMP/2eIm2eame0GT4O/q6FEdlvQ5TV8Y3i11tFBnrR/hn
	 VsTO4czqmxnMS+6jfFrtl47BCS4IBtfYUqdDnjMG1yxS0gBxdPUfIIWNuaYrREU63w
	 miphOcvqdh+A5+2gmRbLpehv2ytYMlYGUuugzoxgJe1AYt+niMsscX9eNFUyO
Authentication-Results: tana.it; auth=pass (details omitted)
Received: from pcale.tana (pcale.tana [172.25.197.111])
  (AUTH: CRAM-MD5 uXDGrn@SYT0/k)
  by wmail.tana.it with ESMTPA
  id 00000000005DC053.000000005F1E8F82.00007306; Mon, 27 Jul 2020 10:25:38 +0200
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
From: Alessandro Vesely <vesely@tana.it>
To: Devuan Bug Tracking System <submit@bugs.devuan.org>
Message-ID: <159583832778.5523.4267786497736057480.reportbug@pcale.tana>
X-Mailer: reportbug 7.5.3+devuan3
Date: Mon, 27 Jul 2020 10:25:27 +0200
X-Spam-Status: No, score=-2.5 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,
	RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS autolearn=disabled
	version=3.4.2
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on tupac3.dyne.org

Package: libc6
Version: GNU C Library (Debian GLIBC 2.28-10) stable release version 2.28.
Severity: normal

Dear Maintainer,

in certain situations, execve fails setting errno to EACCESS.  The same
program, launched by the same user in different ways, succeeds or fails
according to preceding actions.

None of the failure conditions for EACCESS is met.

The case at hand happens with an old version of Thunderbird and a LibreOffice
attachment.  After saving the attachment, Thunderbird execs gio-launch-desktop.
The latter tries to exec libreoffice6.4 and fails.

I strace'd the full arguments used in the failed execve(), and copied them to a
simple C program which runs just that execve() call.  When called from the
command line, the program succeeds.  Then I replaced the gio-launch-desktop
executable with my straw men.  When called from Thunderbird, the program fails.

See also:
https://unix.stackexchange.com/questions/600174/permission-denied-intermittent-
in-execve


-- System Information:
Distributor ID: Debian
Description:    Devuan GNU/Linux 3 (beowulf)
Release:        3
Codename:       beowulf
Architecture: x86_64

Kernel: Linux 4.19.0-9-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8),
LANGUAGE=en_IE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Send a report that this bug log contains spam.

Devuan bug report logs - #497 libc6: Permission denied, intermittent in execve

Devuan bug report logs - #497
libc6: Permission denied, intermittent in execve