The following one line script will cause apache/mod_perl2 to segfault:
delete @::ENV{'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
A backtrace from the later combination gives:
#0 0x4024b447 in Perl_mg_clear ()
from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
#1 0x40253989 in Perl_hv_delete_ent ()
from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
#2 0x4027ff27 in Perl_pp_delete ()
from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
#3 0x40258059 in Perl_runops_standard ()
from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
#4 0x40200139 in S_call_body ()
from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
#5 0x401ffeb6 in Perl_call_sv ()
from /usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE/libperl.so
#6 0x401c85f2 in modperl_callback ()
from /usr/local/apache2/modules/mod_perl.so
#7 0x401c8abe in modperl_callback_run_handlers ()
from /usr/local/apache2/modules/mod_perl.so
#8 0x401c8d05 in modperl_callback_per_dir ()
from /usr/local/apache2/modules/mod_perl.so
#9 0x401c4a55 in modperl_response_handler_run ()
from /usr/local/apache2/modules/mod_perl.so
#10 0x401c4c75 in modperl_response_handler_cgi ()
from /usr/local/apache2/modules/mod_perl.so
#11 0x0807c4f0 in ap_run_handler (r=0x8160178) at config.c:195
#12 0x0807cad6 in ap_invoke_handler (r=0x8160178) at config.c:401
#13 0x0806afc7 in ap_process_request (r=0x8160178) at http_request.c:288
#14 0x08066be1 in ap_process_http_connection (c=0x815bd10) at
http_core.c:293
#15 0x08086268 in ap_run_process_connection (c=0x815bd10) at
connection.c:85
#16 0x08086555 in ap_process_connection (c=0x815bd10, csd=0x815bc40)
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=0xbffff924) at main.c:643
#22 0x420158d4 in __libc_start_main () from /lib/i686/libc.so.6
I built apache with debug info, but forgot to build mod_perl that way. The
above one liner script should be enough to reproduce this, though.
This happens in PerlRun or Registry mode. It isn't restricted to the PATH
variable; deleting any existing ENV var causes the crash.
Thanks,
Bradley
