[Bug 1495674] [NEW] libmysqlclient.so.18 segmentation fault on mysql_close_free_options

Mon Sep 14 19:26:25 UTC 2015

Public bug reported:

I'm using apache2 version 2.4.7-1ubuntu4.5 with libmysqlclient18 version 5.7.5-m15-1ubuntu14.04 on Ubuntu 14.04
With moodle as php script apache exits with this log:

[Sun Sep 13 23:40:06.790779 2015] [core:notice] [pid 7829] AH00051:
child pid 7832 exit signal Segmentation fault (11), possible coredump in
/etc/apache2

I made apache to run only with one child process and attached to it
using gdb & then tried to load moodle in browser and got segmentation
fault :

Program received signal SIGSEGV, Segmentation fault.
0x00007f84d5632117 in mysql_close_free_options () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18

Here is Backtrace:

(gdb) backtrace
#0  0x00007f84d5632117 in mysql_close_free_options () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#1  0x00007f84d56324e6 in mysql_close () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#2  0x00007f84d51d3268 in php_mysqli_close () from /usr/lib/php5/20121212/mysqli.so
#3  0x00007f84d51d33b9 in zif_mysqli_close () from /usr/lib/php5/20121212/mysqli.so
#4  0x00007f84e373600b in dtrace_execute_internal () from /usr/lib/apache2/modules/libphp5.so
#5  0x00007f84e0c84476 in xdebug_execute_internal (current_execute_data=0x7f84e7a0a850, fci=0x0, return_value_used=0) at /build/buildd/xdebug-2.2.3/xdebug-2.2.3/xdebug.c:1551
#6  0x00007f84e37f6075 in ?? () from /usr/lib/apache2/modules/libphp5.so
#7  0x00007f84e376fda8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#8  0x00007f84e3735f09 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#9  0x00007f84e0c83a7c in xdebug_execute_ex (execute_data=0x7f84e7a0a850) at /build/buildd/xdebug-2.2.3/xdebug-2.2.3/xdebug.c:1437
#10 0x00007f84e37f66c0 in ?? () from /usr/lib/apache2/modules/libphp5.so
#11 0x00007f84e376fda8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#12 0x00007f84e3735f09 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#13 0x00007f84e0c83a7c in xdebug_execute_ex (execute_data=0x7f84e7a0a6c8) at /build/buildd/xdebug-2.2.3/xdebug-2.2.3/xdebug.c:1437
#14 0x00007f84e3738241 in zend_call_function () from /usr/lib/apache2/modules/libphp5.so
#15 0x00007f84e375d1e5 in zend_call_method () from /usr/lib/apache2/modules/libphp5.so
#16 0x00007f84e3768112 in zend_objects_destroy_object () from /usr/lib/apache2/modules/libphp5.so
#17 0x00007f84e376db05 in zend_objects_store_call_destructors () from /usr/lib/apache2/modules/libphp5.so
#18 0x00007f84e373653d in shutdown_destructors () from /usr/lib/apache2/modules/libphp5.so
#19 0x00007f84e3745fb4 in zend_call_destructors () from /usr/lib/apache2/modules/libphp5.so
#20 0x00007f84e36e6535 in php_request_shutdown () from /usr/lib/apache2/modules/libphp5.so
#21 0x00007f84e37f7c2f in ?? () from /usr/lib/apache2/modules/libphp5.so
#22 0x00007f84e78d5ba0 in ap_run_handler ()
#23 0x00007f84e78d60e9 in ap_invoke_handler ()
#24 0x00007f84e78eb6aa in ap_process_async_request ()
#25 0x00007f84e78eb984 in ap_process_request ()
#26 0x00007f84e78e8422 in ?? ()
#27 0x00007f84e78df1e0 in ap_run_process_connection ()
#28 0x00007f84e4117767 in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
#29 0x00007f84e41179a6 in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
#30 0x00007f84e411860e in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
#31 0x00007f84e78bc8ae in ap_run_mpm ()
#32 0x00007f84e78b6046 in main ()

** Affects: mysql-5.5 (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: libmysqlclient18 mysql5.5

** Tags added: libmysqlclient18 mysql5.5

** Description changed:

  I'm using apache2 version 2.4.7-1ubuntu4.5 with libmysqlclient18 version 5.7.5-m15-1ubuntu14.04 on Ubuntu 14.04
- With moodle as php script apache exits with this log:  
+ With moodle as php script apache exits with this log:

  [Sun Sep 13 23:40:06.790779 2015] [core:notice] [pid 7829] AH00051:
  child pid 7832 exit signal Segmentation fault (11), possible coredump in
  /etc/apache2

  I made apache to run only with one child process and attached to it
  using gdb & then tried to load moodle in browser and got segmentation
  fault :

  Program received signal SIGSEGV, Segmentation fault.
  0x00007f84d5632117 in mysql_close_free_options () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
- (gdb) backtrace 
+ 
+ Here is Backtrace:
+ 
+ (gdb) backtrace
  #0  0x00007f84d5632117 in mysql_close_free_options () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
  #1  0x00007f84d56324e6 in mysql_close () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
  #2  0x00007f84d51d3268 in php_mysqli_close () from /usr/lib/php5/20121212/mysqli.so
  #3  0x00007f84d51d33b9 in zif_mysqli_close () from /usr/lib/php5/20121212/mysqli.so
  #4  0x00007f84e373600b in dtrace_execute_internal () from /usr/lib/apache2/modules/libphp5.so
  #5  0x00007f84e0c84476 in xdebug_execute_internal (current_execute_data=0x7f84e7a0a850, fci=0x0, return_value_used=0) at /build/buildd/xdebug-2.2.3/xdebug-2.2.3/xdebug.c:1551
  #6  0x00007f84e37f6075 in ?? () from /usr/lib/apache2/modules/libphp5.so
  #7  0x00007f84e376fda8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
  #8  0x00007f84e3735f09 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
  #9  0x00007f84e0c83a7c in xdebug_execute_ex (execute_data=0x7f84e7a0a850) at /build/buildd/xdebug-2.2.3/xdebug-2.2.3/xdebug.c:1437
  #10 0x00007f84e37f66c0 in ?? () from /usr/lib/apache2/modules/libphp5.so
  #11 0x00007f84e376fda8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
  #12 0x00007f84e3735f09 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
  #13 0x00007f84e0c83a7c in xdebug_execute_ex (execute_data=0x7f84e7a0a6c8) at /build/buildd/xdebug-2.2.3/xdebug-2.2.3/xdebug.c:1437
  #14 0x00007f84e3738241 in zend_call_function () from /usr/lib/apache2/modules/libphp5.so
  #15 0x00007f84e375d1e5 in zend_call_method () from /usr/lib/apache2/modules/libphp5.so
  #16 0x00007f84e3768112 in zend_objects_destroy_object () from /usr/lib/apache2/modules/libphp5.so
  #17 0x00007f84e376db05 in zend_objects_store_call_destructors () from /usr/lib/apache2/modules/libphp5.so
  #18 0x00007f84e373653d in shutdown_destructors () from /usr/lib/apache2/modules/libphp5.so
  #19 0x00007f84e3745fb4 in zend_call_destructors () from /usr/lib/apache2/modules/libphp5.so
  #20 0x00007f84e36e6535 in php_request_shutdown () from /usr/lib/apache2/modules/libphp5.so
  #21 0x00007f84e37f7c2f in ?? () from /usr/lib/apache2/modules/libphp5.so
  #22 0x00007f84e78d5ba0 in ap_run_handler ()
  #23 0x00007f84e78d60e9 in ap_invoke_handler ()
  #24 0x00007f84e78eb6aa in ap_process_async_request ()
  #25 0x00007f84e78eb984 in ap_process_request ()
  #26 0x00007f84e78e8422 in ?? ()
  #27 0x00007f84e78df1e0 in ap_run_process_connection ()
  #28 0x00007f84e4117767 in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
  #29 0x00007f84e41179a6 in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
  #30 0x00007f84e411860e in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
  #31 0x00007f84e78bc8ae in ap_run_mpm ()
  #32 0x00007f84e78b6046 in main ()

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https://bugs.launchpad.net/bugs/1495674

Title:
  libmysqlclient.so.18 segmentation fault on mysql_close_free_options

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