[Bug 1102366] Re: libapache2-mod-php5: Segmentation fault on mediawiki POST requests after apache2 reload

[Julio Auto]

Agreed with picometer. This bug _is_ affecting POST-performing code
regardless of mediawiki being installed or not. I have checked myself
that the fixes employed on Debian for bug #694473 have not propagated to
subsequent Ubuntu releases. Furthermore I do have a (non-symbolicated)
backtrace for this occurence and it's remarkably similar to the one
posted for the Debian bug #696626 (a duplicate of #694473), so I'm very
confident that we're talking about the same bug here.

I'd definitely give this some meaningful importance. It basically breaks
my application weekly (when logrotate runs and reloads Apache) and it
was a pain to diagnose. It's not unrealistic to believe it's happening
to many others.

By the way, I'm Running PHP 5.4.6-1ubuntu1.4 on Ubuntu 12.10.


(gdb) bt full
#0  0x00007f8d99138771 in ?? () from /usr/lib/apache2/modules/libphp5.so
No symbol table info available.
...
(many frames later...)
...
#87279 0x00007f8d9913879b in ?? () from /usr/lib/apache2/modules/libphp5.so                                                                       
#87280 0x00007f8d9913879b in ?? () from /usr/lib/apache2/modules/libphp5.so                                                                       
#87281 0x00007f8d9913879b in ?? () from /usr/lib/apache2/modules/libphp5.so                                                                       
#87282 0x00007f8d9913879b in ?? () from /usr/lib/apache2/modules/libphp5.so                                                                       
#87283 0x00007f8d9923efc5 in rfc1867_post_handler () from /usr/lib/apache2/modules/libphp5.so                                                     
#87284 0x00007f8d9923c893 in sapi_handle_post () from /usr/lib/apache2/modules/libphp5.so                                                         
#87285 0x00007f8d99243988 in php_default_treat_data () from /usr/lib/apache2/modules/libphp5.so                                                   
#87286 0x00007f8d990f4cdd in mbstr_treat_data () from /usr/lib/apache2/modules/libphp5.so                                                         
#87287 0x00007f8d992424dc in ?? () from /usr/lib/apache2/modules/libphp5.so                                                                       
#87288 0x00007f8d99271c4b in ?? () from /usr/lib/apache2/modules/libphp5.so                                                                       
#87289 0x00007f8d992a2fd5 in zend_hash_apply () from /usr/lib/apache2/modules/libphp5.so                                                          
#87290 0x00007f8d99243cee in ?? () from /usr/lib/apache2/modules/libphp5.so                                                                       
#87291 0x00007f8d992341f5 in php_request_startup () from /usr/lib/apache2/modules/libphp5.so                                                      
#87292 0x00007f8d9933f39b in ?? () from /usr/lib/apache2/modules/libphp5.so                                                                       
#87293 0x00007f8d9da655f0 in ap_run_handler (r=0x7f8d9d8354c0) at config.c:159                                                                    
#87294 0x00007f8d9da65a3b in ap_invoke_handler (r=r at entry=0x7f8d9d8354c0) at config.c:377                                                         
#87295 0x00007f8d9da751cc in ap_internal_redirect (new_uri=<optimized out>, r=<optimized out>) at http_request.c:554                              
#87296 0x00007f8d973938f8 in ?? () from /usr/lib/apache2/modules/mod_rewrite.so                                                                   
#87297 0x00007f8d9da655f0 in ap_run_handler (r=0x7f8d9d8510a0) at config.c:159                                                                    
#87298 0x00007f8d9da65a3b in ap_invoke_handler (r=r at entry=0x7f8d9d8510a0) at config.c:377                                                         
#87299 0x00007f8d9da75b58 in ap_process_request (r=r at entry=0x7f8d9d8510a0) at http_request.c:282                                                  
#87300 0x00007f8d9da72a08 in ap_process_http_connection (c=0x7f8d9d85f290) at http_core.c:190                                                     
#87301 0x00007f8d9da6bfb0 in ap_run_process_connection (c=0x7f8d9d85f290) at connection.c:43                                                      
#87302 0x00007f8d9da6c398 in ap_process_connection (c=c at entry=0x7f8d9d85f290, csd=<optimized out>) at connection.c:190                            
#87303 0x00007f8d9da7a756 in child_main (child_num_arg=child_num_arg at entry=9) at prefork.c:667                                                    
#87304 0x00007f8d9da7aeb2 in make_child (slot=9, s=0x7f8d9d9d7818) at prefork.c:768                                                               
#87305 make_child (s=0x7f8d9d9d7818, slot=9) at prefork.c:696                                                                                     
#87306 0x00007f8d9da7b9e6 in perform_idle_server_maintenance (p=<optimized out>) at prefork.c:903                                                 
#87307 ap_mpm_run (_pconf=_pconf at entry=0x7f8d9da16028, plog=<optimized out>, s=s at entry=0x7f8d9d9d7818) at prefork.c:1107                          
#87308 0x00007f8d9da5020e in main (argc=3, argv=0x7fffc93d2a78) at main.c:755

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Title:
  libapache2-mod-php5: Segmentation fault on mediawiki POST requests
  after apache2 reload

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