Bug#839048: marked as done (couchjs crashes on ARM64)

To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>

Subject: Bug#839048: marked as done (couchjs crashes on ARM64)

From: owner@bugs.debian.org (Debian Bug Tracking System)

Date: Fri, 09 Dec 2016 03:06:03 +0000

Message-id: <[🔎] handler.839048.D839048.148125263232455.ackdone@bugs.debian.org>

References: <E1cFBTL-000EJk-LH@fasolo.debian.org> <CACc6TXLV7urKXCWyM0+rHJzRBGrHmsCCQos=mdGWNMd=zT8JwA@mail.gmail.com>

Your message dated Fri, 09 Dec 2016 03:03:43 +0000 with message-id <E1cFBTL-000EJk-LH@fasolo.debian.org> and subject line Bug#839048: fixed in mozjs 1.8.5-1.0.0+dfsg-5.1 has caused the Debian Bug report #839048, regarding couchjs crashes on ARM64 to be marked as done. This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact owner@bugs.debian.org immediately.) -- 839048: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=839048 Debian Bug Tracking System Contact owner@bugs.debian.org with problems

--- Begin Message ---

To: submit@bugs.debian.org
Cc: Steve Capper <steve.capper@linaro.org>, Steve McIntyre <steve.mcintyre@linaro.org>
Subject: couchjs crashes on ARM64
From: Zheng Xu <zheng.xu@linaro.org>
Date: Wed, 28 Sep 2016 14:51:23 +0800
Message-id: <CACc6TXLV7urKXCWyM0+rHJzRBGrHmsCCQos=mdGWNMd=zT8JwA@mail.gmail.com>

Package: libmozjs185-1.0

root@3aeb83a7878f:~# cat a.js

print("hello")

root@3aeb83a7878f:~# couchjs a.js

Segmentation fault (core dumped)

couchjs is in couchdb-bin, but the issues is caused by a bug in mozjs. There is an assumption that the VA bits is less equal than 47 bits in mozjs. But it is not true any more when we compile the kernel with 48 VA bits.

Patch is attached which should fix the problem.

Reference links :

1. upstream fix : https://bugzilla.mozilla.org/show_bug.cgi?id=1143022

2. redhat fix : https://bugzilla.redhat.com/show_bug.cgi?id=1242326

Note : Upstream patch limit the heap in the 47 bits world so that we won't break the assumption. But the attached patch uses a different fix. It uses less tag bits so that we can live with 48 VA bits. Because the old mozjs may take JS objects from C code which is not allocated from JS heap.

Attachment: Modify_tagged_pointer_structure_js1.8.5.patch
Description: Binary data

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--- Begin Message ---

To: 839048-close@bugs.debian.org
Subject: Bug#839048: fixed in mozjs 1.8.5-1.0.0+dfsg-5.1
From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Date: Fri, 09 Dec 2016 03:03:43 +0000
Message-id: <E1cFBTL-000EJk-LH@fasolo.debian.org>

Source: mozjs
Source-Version: 1.8.5-1.0.0+dfsg-5.1

We believe that the bug you reported is fixed in the latest version of
mozjs, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 839048@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> (supplier of updated mozjs package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


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Hash: SHA256

Format: 1.8
Date: Fri, 09 Dec 2016 02:53:56 +0100
Source: mozjs
Binary: libmozjs185-1.0 libmozjs185-dev
Architecture: source amd64
Version: 1.8.5-1.0.0+dfsg-5.1
Distribution: sid
Urgency: medium
Maintainer: Debian QA Group <packages@qa.debian.org>
Changed-By: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Description:
 libmozjs185-1.0 - SpiderMonkey JavaScript engine
 libmozjs185-dev - SpiderMonkey JavaScript library - development headers
Closes: 839048
Changes:
 mozjs (1.8.5-1.0.0+dfsg-5.1) unstable; urgency=medium
 .
   * Non-maintainer upload.
   * Add Modify_tagged_pointer_structure_js1.8.5.patch to modify tagged
     pointer to use 48 bit virtual address space (Closes: #839048).
   * Add M68k-alignment-fixes.patch to enforce 32-bit alignment
     on m68k for some StackSegment, JSStackFrame and JSScript.
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