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Bug#837123: [anna] segfault in wheezy installer



On 2016-09-14 16:08, Vincent McIntyre wrote:
> On Wed, Sep 14, 2016 at 09:29:18AM +1000, Vincent McIntyre wrote:
> > > Also you might want to use the console (alt+f2) to run wget by hand and
> > > see if the issue happen with all hosts or only some of them.
> > 
> > I tried to wget pages from a few web sites from the alt+f2 console.
> > It segfaulted every time when I used a DNS name in the URL,
> > but worked if I used an IP address in the URL.
> > ping does the same thing; segfaults only when using domain names.
> > 
> > If I put an entry in /etc/hosts and try to access that hostname,
> > wget and ping also segfault, until I add this line to nsswitch.conf:
> > 
> >   hosts: files dns
> > 
> > Then they both work for that hostname.
> > The only other nsswitch.conf lines are for passwd, group & shadow.
> > 
> 
> I was able to netcat busybox & the coredump to a wheezy machine
> and got this backtrace, which does not look like it is much help...
> 
> % gdb ./ping ./ping.core
> GNU gdb (GDB) 7.4.1-debian
> ...
> warning: Can't read pathname for load map: Input/output error.
> 
> warning: Could not load shared library symbols for 4 libraries, e.g. /lib/libc.so.6.
> Use the "info sharedlibrary" command to see the complete listing.
> Do you need "set solib-search-path" or "set sysroot"?
> Core was generated by `ping ftp.au.debian.org'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x00007f826609d0ca in ?? ()
> (gdb) bt full
> #0  0x00007f826609d0ca in ?? ()
> No symbol table info available.
> #1  0x0000000000000000 in ?? ()
> No symbol table info available.
> (gdb) q

Have you installed libc6-dbg on this wheezy machine? Anyway I am afraid
that gdb is confused as the libc6 in debian-installer got some symbols
removed...

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net


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