From owner-freebsd-current@freebsd.org  Tue Mar 22 10:52:05 2016
Return-Path: <owner-freebsd-current@freebsd.org>
Delivered-To: freebsd-current@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id EEFEDAD94E0
 for <freebsd-current@mailman.ysv.freebsd.org>;
 Tue, 22 Mar 2016 10:52:05 +0000 (UTC)
 (envelope-from kostikbel@gmail.com)
Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1])
 (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 8A3A563C
 for <freebsd-current@freebsd.org>; Tue, 22 Mar 2016 10:52:05 +0000 (UTC)
 (envelope-from kostikbel@gmail.com)
Received: from tom.home (kostik@localhost [127.0.0.1])
 by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id u2MApx8S044951
 (version=TLSv1 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO);
 Tue, 22 Mar 2016 12:51:59 +0200 (EET)
 (envelope-from kostikbel@gmail.com)
DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua u2MApx8S044951
Received: (from kostik@localhost)
 by tom.home (8.15.2/8.15.2/Submit) id u2MApxdJ044950;
 Tue, 22 Mar 2016 12:51:59 +0200 (EET)
 (envelope-from kostikbel@gmail.com)
X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com
 using -f
Date: Tue, 22 Mar 2016 12:51:59 +0200
From: Konstantin Belousov <kostikbel@gmail.com>
To: "Oleg V. Nauman" <oleg@opentransfer.com>
Cc: freebsd-current@freebsd.org
Subject: Re: Fatal error 'mutex is on list' at line 139 in file
 /usr/src/lib/libthr/thread/thr_mutex.c (errno = 35)
Message-ID: <20160322105159.GS1741@kib.kiev.ua>
References: <5093647.qxI0C33PyG@asus.theweb.org.ua>
 <1850738.9W54HNFmp1@asus.theweb.org.ua>
 <20160322075323.GR1741@kib.kiev.ua>
 <24312565.qdfGvr8xZt@asus.theweb.org.ua>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <24312565.qdfGvr8xZt@asus.theweb.org.ua>
User-Agent: Mutt/1.5.24 (2015-08-30)
X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00,
 DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no
 autolearn_force=no version=3.4.1
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on tom.home
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.21
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 22 Mar 2016 10:52:06 -0000

On Tue, Mar 22, 2016 at 12:01:38PM +0200, Oleg V. Nauman wrote:
>  After applying this patch:
> 
> No coredumps produced after three subsequent KDE session restarts.

Thank you for patience and testing.  The issue is apparent bug in KDE
which can do several calls to pthread_mutex_init() for process-shared
mutex, from different processes.  This situation is declared as undefined
by Posix and really is quite severe bug for unchecked implementations.

I committed the workaround as r297185.