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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 44639] Segmentation fault 11 errors right after server started up
Date Thu, 20 Mar 2008 20:40:37 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=44639


Ruediger Pluem <rpluem@apache.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |NEEDINFO




--- Comment #11 from Ruediger Pluem <rpluem@apache.org>  2008-03-20 13:40:37 PST ---
(In reply to comment #10)
> (In reply to comment #7)
> > (In reply to comment #4)
> > > (In reply to comment #2)
> > > > Here you go. Thanks, dave
> > > > 
> > > > 
> > > >   main(0x3, 0xffbff07c, 0xffbff08c, 0x3a6c00, 0x0, 0x0)
> > > >    ap_mpm_run(0x3ddaf0, 0x41fbf8, 0x3e4298, 0x3e4298, 0x0, 0x0)
> > > >    perform_idle_server_maintenance(0x3ddaf0, 0xffbfef44, 0xffbfef30, 0x3ddaf0,

> > > >          0x3e4298, 0x377990)
> > > >    make_child(0x3e4298, 0x0, 0xffbfef48, 0x1, 0x3ddaf0, 0x348864)
> > > >    child_main(0x0, 0x2367b8, 0x1, 0x0, 0xffbfee50, 0xffbfee40)
> > > >    unixd_setup_child(0x0, 0x520440, 0x567090, 0x0, 0x0, 0x0)
> > > >    set_group_privs(0x0, 0x567090, 0x520440, 0x0, 0x0, 0x0)
> > > >    _initgroups(0x4efbb0, 0x65, 0x0, 0x0, 0x0, 0x0)
> > > >    _getgroupsbymember(0x4efbb0, 0x560658, 0x10, 0x1, 0x0, 0x5606a1)
> > > >    _nss_search(0x2, 0xfeeb614c, 0x56b090, 0xffbfeb44, 0x4e455449, 0xff03f084)
> > > >    0xfeeb6178(0x55fee8, 0xffbfeb44, 0x30, 0x56b0e8, 0x72000000, 0x72000000)
> > >    0xfeeb2e50(0x2, 0xff000000, 0x0, 0x56b144, 0x0, 0x0)
> > > >    0xfee89d90(0x0, 0x0, 0x0, 0xfeebbea8, 0xfeebbeb8, 0xfeece478)
> > > >    0xfee89768(0x4debd8, 0x566b98, 0x4dd5f8, 0x0, 0x0, 0xffbfe520)
> > > >    0xfee888ac(0xffffffff, 0x566b98, 0x1, 0xffbfe524, 0x0, 0x40)
> > > >    0xfee88170(0x0, 0x3, 0xfeea1f78, 0xfeea2304, 0xad8, 0x1)
> > > >    0x0(0x0, 0x800, 0x0, 0x0, 0x800, 0x0)
> > > > 
> > > 
> > > Could you please provide a gdb backtrace? It should give us more information.
> > > 
> > 
> > This issue occurred on a Customer production box that does not have debug tool
> > like gdb.
> > Also, the Apache we built is using Sun's cc compiler, not the g++. Doesn't gdb
> > only debug symbols that are generated by g++? The stack traces I provided above
> > was from a core dump using Sun's workshop (dbx). I can email you the core file
> > if you need.
> > thanks,
> > dave
> > 
> 
> I took the core and ran it with the gdb on my local box, it gives the
> following: (doesn't seem to much help though.)
>    (gdb) core-file core
>    Core was generated by `/opt/Apache/httpd/bin/nhihttpd -f /opt/
> Apache/httpd/conf/http'.
>    Program terminated with signal 11, Segmentation fault.
>    #0  0x00000000 in ?? ()


You cannot do this on your local box. This only works on the box that generated
the core unless your box is a perfect clone of the box where the core dump
happened :-).
Nevertheless, googling around I found similar reports of crashes in Samba and
other applications that all fail when using initgroups on Solaris 9, so this
could be a Solaris 9 bug.
I am no dbx expert, but it would be nice to know what string is stored at
0x4efbb0.
Furthermore please provide the settings of the User and Group directives in
your httpd.conf and the name of the group with the id 101.


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