strange abort with kcheckpass

[Damian Weber]

On Tue, 12 Jan 2010, Andy Fawcett wrote:

> Date: Tue, 12 Jan 2010 19:18:39 +0200
> From: Andy Fawcett <andy at athame.co.uk>
> To: freebsd-stable at freebsd.org
> Cc: Damian Weber <dweber at htw-saarland.de>
> Subject: Re: strange abort with kcheckpass
> 
> On Tuesday 12 January 2010 17:49:25 Damian Weber wrote:
> > Hi, all,
> > 
> > I've got a strange SIGABRT issue with kcheckpass.
> > Of course, kcheckpass is not contained in the base
> > system, yet I write to this list since the base system
> > could be able to help with tracking this down.
> > (kcheckpass is called from a screen locker which fails
> > to operate properly as a consequence of the SIGABRT.)
> > 
> > Normal behaviour:
> > (for example with wrong password)
> > $ kcheckpass
> > Password:
> > Authentication failure
> > 
> > Strange behaviour here (called mybox below):
> > $ kcheckpass
> > Abort trap: 6
> > 
> > I've recompiled the kcheckpass part of the kdebase3
> > port with option -g.
> > Starting with debugger even doesn't let me reach a
> > breakpoint at main(), because the SIGABRT happens
> > earlier.
> > 
> > # pwd
> > /usr/ports/x11/kdebase3/work/kdebase-3.5.10/kcheckpass
> > 
> > # ldd ./kcheckpass
> > ./kcheckpass:
> >         libkdefakes.so.6 => /usr/local/lib/libkdefakes.so.6 (0x68193000)
> >         libpam.so.4 => /usr/lib/libpam.so.4 (0x68195000)
> >         libjpeg.so.10 => /usr/local/lib/libjpeg.so.10 (0x6819c000)
> >         libthr.so.3 => /lib/libthr.so.3 (0x681d0000)
> >         libc.so.7 => /lib/libc.so.7 (0x68080000)
> > 
> > # gdb ./kcheckpass
> > GNU gdb 6.1.1 [FreeBSD]
> > Copyright 2004 Free Software Foundation, Inc.
> > GDB is free software, covered by the GNU General Public License, and you
> >  are welcome to change it and/or distribute copies of it under certain
> >  conditions. Type "show copying" to see the conditions.
> > There is absolutely no warranty for GDB.  Type "show warranty" for details.
> > This GDB was configured as "i386-marcel-freebsd"...
> > (gdb) b main
> > Breakpoint 1 at 0x1470: file kcheckpass.c, line 297.
> > (gdb) r
> > Starting program:
> >  /usr/ports/x11/kdebase3/work/kdebase-3.5.10/kcheckpass/kcheckpass
> > 
> > Program terminated with signal SIGABRT, Aborted.
> > The program no longer exists.
> > You can't do that without a process to debug.
> > (gdb) q
> > 
> > $ uname -a
> > FreeBSD mybox 7.2-STABLE FreeBSD 7.2-STABLE #18: Mon Dec 14 00:39:13 CET
> >  2009     mybox  i386 $ ls -ld /var/db/pkg/kdebase*
> > drwxr-xr-x  2 root  wheel  512 Jan 11 18:35 /var/db/pkg/kdebase-3.5.10_4/
> > drwxr-xr-x  2 root  wheel  512 Jan 11 18:35
> >  /var/db/pkg/kdebase-kompmgr-3.5.10_1/
> > 
> > Any ideas what's the cause or what I should try next to see where this
> > abort comes from?
> > 
> > Thanks,
> > 
> >    Damian
> 
> try debugging kcheckpass --nofork, as it will prevent the process forking off into the background.
> 
> A.

no luck:

# gdb ./kcheckpass
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...

(gdb) b main
Breakpoint 1 at 0x1470: file kcheckpass.c, line 297.

(gdb) run --nofork
Starting program: /usr/ports/x11/kdebase3/work/kdebase-3.5.10/kcheckpass/kcheckpass --nofork

Program terminated with signal SIGABRT, Aborted.
The program no longer exists.
You can't do that without a process to debug.