Received: from out1.migadu.com (out1.migadu.com [91.121.223.63])
	by nld3-dev1.alpinelinux.org (Postfix) with ESMTPS id 86F687819AA
	for <~alpine/users@lists.alpinelinux.org>; Tue, 16 Jun 2020 01:20:08 +0000 (UTC)
X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers.
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dereferenced.org;
	s=default; t=1592270408;
	h=from:from:reply-to:subject:subject:date:date:message-id:message-id:
	 to:to:cc:cc:mime-version:mime-version:content-type:content-type:
	 content-transfer-encoding:content-transfer-encoding:
	 in-reply-to:in-reply-to:references:references;
	bh=SRdV5sysXOQJ0rJqqBVepJ6W/8bhpRB5erblT+J9H8I=;
	b=SIEUHlU/KPGcIfGGzpeg65ZtXchyU587NAxQFxiPt5hgmO1jJZZqexoOS4r0XaanlaJ5/k
	3bmCB3hdS7kvAF3h+LvlMIPrsGl1x2jOHKh9vKQhpIxFAD2U34TQUdrht4sy1vKpy5kkT6
	2UJM4T0unxC5oCi2mAmjRyzxZ6yo8wY=
From: Ariadne Conill <ariadne@dereferenced.org>
To: ~alpine/users@lists.alpinelinux.org
Cc: Freemail HArry <freemail.grharry@gmail.com>
Subject: Re: isc dhcp server with ldap crashes when DDNS is on
Date: Mon, 15 Jun 2020 19:20:01 -0600
Message-ID: <2129815.kA8iipvtqG@localhost>
In-Reply-To: <CAJaGSvmxC09YxCFh-FTae5a3Z8HJNKsiMtbS26bbK3NLGkCn3g@mail.gmail.com>
References: <CAJaGSvmxC09YxCFh-FTae5a3Z8HJNKsiMtbS26bbK3NLGkCn3g@mail.gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 7Bit
Content-Type: text/plain; charset="us-ascii"
X-Spam-Score: 0.90

Hello,

On Monday, June 15, 2020 9:18:59 AM MDT Freemail HArry wrote:
> Hello,
> It seems that there is a bug in dhcpd + musl ?  ...
> when "ddns-update-style interim;" is on
> 
> I've tried to run it with and without the ldap backend but I get the
> same error.
> 
> dhcpd service crashes and dmesg shows something like
> dhcpd[7523]: segfault at 3 ip 00007f3f93784118 sp 00007ffeec735be0
> error 4 in ld-musl-x86_64.so.1[7f3f93779000+47000]

This is due to a null-pointer dereference inside dhcpd code.  It is most 
likely unrelated to musl.

In past experience, I've noted that dhcpd is somewhat fragile with 
misconfiguration.  Most likely that is what is happening here.

If you are certain your configuration is good, please report a bug -- we can 
build a new dhcpd package with debug symbols, which can be used with gdb to 
ascertain why it is crashing.

Ariadne