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Date: Thu, 2 Aug 2012 19:13:13 -0700
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Alexander Kabaev <kabaev@gmail.com>
Message-ID: <20120803021313.GA36246@troutmask.apl.washington.edu>
References: <20120802213954.GA34928@troutmask.apl.washington.edu>
	<20120802215536.027914c9@kan.dyndns.org>
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Cc: freebsd-current@freebsd.org, kib@freebsd.org
Subject: Re: rtld dropping core on recent -current
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On Thu, Aug 02, 2012 at 09:55:36PM -0400, Alexander Kabaev wrote:
> On Thu, 2 Aug 2012 14:39:54 -0700
> Steve Kargl <sgk@troutmask.apl.washington.edu> wrote:
> 
> > % file /usr/local/bin/ppdpo
> > /usr/local/bin/ppdpo: ELF 32-bit LSB shared object, Intel 80386, \
> > version 1 (FreeBSD), dynamically linked (uses shared libs),
> > FreeBSD-style,\ for FreeBSD 10.0 (1000015), stripped
> > 
> > % ldd /usr/local/bin/ppdpo
> > /usr/local/bin/ppdpo:
> > /usr/local/bin/ppdpo: signal 11
> > 
> 
> It is weird that program tries to dlopen what appears to be the binary
> (itself?), but that did uncover the issue. Please try attached patch,
> I only very lightly tested it here.
> 
> Also available here:
> http://people.freebsd.org/~kan/rtld-digest-notes.diff
> 

The patch appears to fix the problem. 

Before the patch

% find /usr/local/bin -type f | xargs -n1 file -F ' ' | grep ELF \
| grep ELF | cut -f1 -d' ' | xargs ldd -f '%A %o\n' | grep libpng.so.6
/usr/local/bin/ppdc: signal 11
/usr/local/bin/ppdhtml: signal 11
/usr/local/bin/ipptool: signal 11
/usr/local/bin/cupstestdsc: signal 11
/usr/local/bin/cupstestppd: signal 11
/usr/local/bin/lpstat: signal 11
/usr/local/bin/lpq: signal 11
/usr/local/bin/lpr: signal 11
/usr/local/bin/ppdpo: signal 11
/usr/local/bin/cancel: signal 11
/usr/local/bin/lpoptions: signal 11
/usr/local/bin/lppasswd: signal 11
/usr/local/bin/ppdi: signal 11
/usr/local/bin/ppdmerge: signal 11
/usr/local/bin/inkscape libpng.so.6
/usr/local/bin/inkview libpng.so.6
/usr/local/bin/lp: signal 11
/usr/local/bin/lprm: signal 11

After applying the patch and rebuilding

% find /usr/local/bin -type f | xargs -n1 file -F ' ' | grep ELF \
| cut -f1 -d' ' | xargs ldd -f '%A %o\n' | grep libpng.so.6
/usr/local/bin/inkscape libpng.so.6
/usr/local/bin/inkview libpng.so.6

Thanks for the quick response.

-- 
Steve