Subject: Re: bin/34124: rtadvd(8) crashes frequently
To: None <gnats-admin@netbsd.org, netbsd-bugs@netbsd.org,>
From: Matthias Scheler <tron@zhadum.org.uk>
List: netbsd-bugs
Date: 08/02/2006 10:40:02
The following reply was made to PR bin/34124; it has been noted by GNATS.
From: Matthias Scheler <tron@zhadum.org.uk>
To: gnats-bugs@NetBSD.org
Cc:
Subject: Re: bin/34124: rtadvd(8) crashes frequently
Date: Wed, 2 Aug 2006 11:35:44 +0100
On Wed, Aug 02, 2006 at 10:26:53AM +0100, Matthias Scheler wrote:
> On Wed, Aug 02, 2006 at 08:25:00AM +0000, gnats-admin@NetBSD.org wrote:
> > Thank you very much for your problem report.
> > It has the internal identification `bin/34124'.
> > The individual assigned to look at your
> > report is: bin-bug-people.
> >
> > >Category: bin
> > >Responsible: bin-bug-people
> > >Synopsis: rtadvd(8) crashes frequently
> > >Arrival-Date: Wed Aug 02 08:25:00 +0000 2006
>
> It gets evening more annoying. I've recompiled the binary with "-g",
> waited until it core dumped again and cannot debug it now:
Martin Husemann gave the crucial advise to compile the binary with
the "-gstabs" option and I can debug it now:
tron@ivanova:/usr/src/usr.sbin/rtadvd>gdb rtadvd rtadvd.core
[...]
#0 0x00015290 in get_next_msg (buf=0xefffe276 "", lim=0xefffe30a "",
ifindex=0, lenp=0xefffeaf8, filter=45062) at if.c:247
247 get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
It looks like an alignment problem. "rtm" is a pointer to "struct rt_msghdr".
"struct rt_msghdr" contains 32bit values but is not aligned on a 32bit
boundary.
Kind regards
--
Matthias Scheler http://scheler.de/~matthias/