gozer at cpan
Oct 16, 2002, 6:26 PM
Post #2 of 3
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Re: [mp2] segfault deleting ENV variable (fwd)
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On Thu, 2002-10-17 at 06:43, Bradley Baetz wrote:
> Hmm, I wasn't subscribed to teh dev list, and this doesn't seem to have
> made it to the archives. Sorry if people get this twice.
I've tried to reproduce this with the same configurations you have with
no luck ;-(
Could you maybe send me your complet httpd.conf, see if I can just get
the darn thing to segfault on me...
Gozer out.
> Bradley
>
> ---------- Forwarded message ----------
> Date: Wed, 16 Oct 2002 13:37:50 +1000 (EST)
> From: Bradley Baetz <bbaetz[at]student.usyd.edu.au>
> To: Philippe M. Chiasson <gozer[at]cpan.org>
> Cc: dev[at]perl.apache.org
> Subject: Re: [mp2] segfault deleting ENV variable
>
> On 16 Oct 2002, Philippe M. Chiasson wrote:
>
> > On Tue, 2002-10-15 at 21:22, Bradley Baetz wrote:
> > > The following one line script will cause apache/mod_perl2 to segfault:
> > >
> > > delete @::ENV{'PATH'};
> >
> > $ENV{'PATH'} would be slightly more modern ;-)
>
> :) The original line was:
>
> delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};
>
> as taken from |perldoc perlsec| (and slightly modified to include PATH)
>
> >
> > >
> > > I've tried this with both apache-2.0.40/mod_perl-1.99_05/perl-5.8.0 (ie
> > > stock RH8), and apache-2.0.43/mod_perl-1.99_07/perl-5.8.0
> >
> > I just tried with both the configuration you list here, and no
> > segfaults.
> >
>
> Are you sure that $ENV{PATH} has a value? Try deleting QUERY_STRING, or
> MOD_PERL.
>
> The script is really simple. I've attached it, but it literally is just
> the one line.
>
> I've also attached my .htaccess file. The .htaccess isn't causing it,
> though - adding to httpd.conf:
>
> <Files foo.cgi>
> SetHandler perl-script
> PerlResponseHandler ModPerl::PerlRun
> Options +ExecCGI
> </Files>
>
> directly, and running w/o a .htaccess file produces the same result.
>
> With that, and a debug mod_perl, I get the following backtrace for
> http://localhost/foo.cgi:
>
> #0 0x40253447 in Perl_mg_clear ()
> from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
> #1 0x4025b989 in Perl_hv_delete_ent ()
> from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
> #2 0x4028802e in Perl_pp_delete ()
> from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
> #3 0x40260059 in Perl_runops_standard ()
> from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
> #4 0x40208139 in S_call_body ()
> from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
> #5 0x40207eb6 in Perl_call_sv ()
> from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
> #6 0x401cae93 in modperl_callback (my_perl=0x81517f0, handler=0x80fee70,
> p=0x81601e8, r=0x8160220, s=0x80b9358, args=0x816885c)
> at modperl_callback.c:53
> #7 0x401cb523 in modperl_callback_run_handlers (idx=6, type=4,
> r=0x8160220,
> c=0x0, s=0x80b9358, pconf=0x0, plog=0x0, ptemp=0x0)
> at modperl_callback.c:180
> #8 0x401cb5fa in modperl_callback_per_dir (idx=6, r=0x8160220)
> at modperl_callback.c:202
> #9 0x401c59c0 in modperl_response_handler_run (r=0x8160220, finish=0)
> at mod_perl.c:709
> #10 0x401c5bf5 in modperl_response_handler_cgi (r=0x8160220) at
> mod_perl.c:771
> #11 0x0807c4f0 in ap_run_handler (r=0x8160220) at config.c:195
> #12 0x0807cad6 in ap_invoke_handler (r=0x8160220) at config.c:401
> #13 0x0806afc7 in ap_process_request (r=0x8160220) at http_request.c:288
> #14 0x08066be1 in ap_process_http_connection (c=0x815bdc8) at
> http_core.c:293
> #15 0x08086268 in ap_run_process_connection (c=0x815bdc8) at
> connection.c:85
> #16 0x08086555 in ap_process_connection (c=0x815bdc8, csd=0x815bcf8)
> at connection.c:207
> #17 0x0807ae0d in child_main (child_num_arg=1651076143) at prefork.c:696
> #18 0x0807afd4 in make_child (s=0x80b9358, slot=0) at prefork.c:736
> #19 0x0807b041 in startup_children (number_to_start=5) at prefork.c:808
> #20 0x0807b7bf in ap_mpm_run (_pconf=0x80ab53c, plog=0x80eed30,
> s=0x80b9358)
> at prefork.c:1024
> #21 0x08080d8e in main (argc=2, argv=0xbffff8f4) at main.c:643
> #22 0x420158d4 in __libc_start_main () from /lib/i686/libc.so.6
>
> modperl_env.c is beyond my perl knowledge to try to work out whats going
> wrong, though.
>
> Bradley
> ----
>
> delete $ENV{'PATH'};
> ----
>
> <Files foo.cgi>
> SetHandler perl-script
> PerlResponseHandler ModPerl::PerlRun
> Options +ExecCGI
> </Files>
> ----
>
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foo.cgi
.htaccess
