[php-maint] Bug#849767: php5-fpm: segfault when using pdo_mysql.so

Antonio Silva asilva at wirelessmundi.com
Fri Dec 30 19:15:04 UTC 2016 

Package: php5-fpm
Version: 5.6.29+dfsg-0+deb8u1


php5-fmp is crashing when connecting to mysql using pdo with segfault.
The web server is nginx and i connect using fastcig parameter: 
fastcgi_pass unix:/var/run/php5-fpm-internal.sock; with default parameters.


I get the following gdb:


[New LWP 3316]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `php-fpm: pool 
internal                                                     '.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  _pdo_mysql_error (dbh=0x202b1a0, stmt=0x0, file=0x7f5fb5cc7f80 
"/build/php5-5.6.29+dfsg/ext/pdo_mysql/mysql_driver.c", line=586) at 
/build/php5-5.6.29+dfsg/ext/pdo_mysql/mysql_driver.c:67
67    /build/php5-5.6.29+dfsg/ext/pdo_mysql/mysql_driver.c: No such file 
or directory.
(gdb) bt
#0  _pdo_mysql_error (dbh=0x202b1a0, stmt=0x0, file=0x7f5fb5cc7f80 
"/build/php5-5.6.29+dfsg/ext/pdo_mysql/mysql_driver.c", line=586) at 
/build/php5-5.6.29+dfsg/ext/pdo_mysql/mysql_driver.c:67
#1  0x00007f5fb5cc6159 in pdo_mysql_handle_factory (dbh=0x202b1a0, 
driver_options=0x0) at 
/build/php5-5.6.29+dfsg/ext/pdo_mysql/mysql_driver.c:772
#2  0x00007f5fb5ed422a in zim_PDO_dbh_constructor (ht=33730976, 
return_value=0x0, return_value_ptr=0x7f5fb5cc7f80, this_ptr=0x272ab50, 
return_value_used=0) at /build/php5-5.6.29+dfsg/ext/pdo/pdo_dbh.c:389
#3  0x00000000006e7aea in dtrace_execute_internal 
(execute_data_ptr=<optimized out>, fci=<optimized out>, 
return_value_used=<optimized out>) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:97
#4  0x00000000007a84d0 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166b3a0) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:560
#5  0x0000000000736820 in execute_ex (execute_data=0x7f5fc166b3a0) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#6  0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166b3a0) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#7  0x00000000007a8a13 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166b188) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:592
#8  0x0000000000736820 in execute_ex (execute_data=0x7f5fc166b188) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#9  0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166b188) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#10 0x00000000007a8a13 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166afa8) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:592
#11 0x0000000000736820 in execute_ex (execute_data=0x7f5fc166afa8) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#12 0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166afa8) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#13 0x00000000006e9826 in zend_call_function (fci=0x7ffe8ec467a0, 
fci_cache=0x0, fci_cache at entry=0x7ffe8ec46770) at 
/build/php5-5.6.29+dfsg/Zend/zend_execute_API.c:831
#14 0x000000000060f4f3 in zif_call_user_func_array (ht=<optimized out>, 
return_value=0x2724118, return_value_ptr=<optimized out>, 
this_ptr=<optimized out>, return_value_used=<optimized out>)
     at /build/php5-5.6.29+dfsg/ext/standard/basic_functions.c:4790
#15 0x00000000006e7aea in dtrace_execute_internal 
(execute_data_ptr=<optimized out>, fci=<optimized out>, 
return_value_used=<optimized out>) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:97
#16 0x00000000007a84d0 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166adc8) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:560
#17 0x0000000000736820 in execute_ex (execute_data=0x7f5fc166adc8) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#18 0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166adc8) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#19 0x00000000006e9826 in zend_call_function (fci=0x7ffe8ec46b50, 
fci_cache=0x0, fci_cache at entry=0x7ffe8ec46b20) at 
/build/php5-5.6.29+dfsg/Zend/zend_execute_API.c:831
#20 0x000000000060f4f3 in zif_call_user_func_array (ht=<optimized out>, 
return_value=0x2722e68, return_value_ptr=<optimized out>, 
this_ptr=<optimized out>, return_value_used=<optimized out>)
     at /build/php5-5.6.29+dfsg/ext/standard/basic_functions.c:4790
#21 0x00000000006e7aea in dtrace_execute_internal 
(execute_data_ptr=<optimized out>, fci=<optimized out>, 
return_value_used=<optimized out>) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:97
#22 0x00000000007a84d0 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166ac80) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:560
#23 0x0000000000736820 in execute_ex (execute_data=0x7f5fc166ac80) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#24 0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166ac80) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#25 0x00000000007a8a13 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166ab20) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:592
#26 0x0000000000736820 in execute_ex (execute_data=0x7f5fc166ab20) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#27 0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166ab20) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#28 0x00000000007a8a13 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166a990) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:592
#29 0x0000000000736820 in execute_ex (execute_data=0x7f5fc166a990) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#30 0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166a990) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#31 0x00000000007a8a13 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166a7e0) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:592
#32 0x0000000000736820 in execute_ex (execute_data=0x7f5fc166a7e0) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#33 0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166a7e0) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#34 0x00000000007a8a13 in zend_do_fcall_common_helper_SPEC 
(execute_data=0x7f5fc166a650) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:592
#35 0x0000000000736820 in execute_ex (execute_data=0x7f5fc166a650) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#36 0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166a650) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#37 0x00000000007a69c8 in ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER 
(execute_data=0x7f5fc166a4c8) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:31631
#38 0x0000000000736820 in execute_ex (execute_data=0x7f5fc166a4c8) at 
/build/php5-5.6.29+dfsg/Zend/zend_vm_execute.h:363
#39 0x00000000006e7988 in dtrace_execute_ex 
(execute_data=0x7f5fc166a4c8) at 
/build/php5-5.6.29+dfsg/Zend/zend_dtrace.c:73
#40 0x00000000006fa570 in zend_execute_scripts (type=33730976, 
type at entry=8, retval=retval at entry=0x0, file_count=-1244889216, 
file_count at entry=3) at /build/php5-5.6.29+dfsg/Zend/zend.c:1341
#41 0x0000000000695790 in php_execute_script 
(primary_file=0x7ffe8ec49a40) at /build/php5-5.6.29+dfsg/main/main.c:2613
#42 0x0000000000464e1f in main (argc=-1050242152, argv=0x7f5fc1669cd0) 
at /build/php5-5.6.29+dfsg/sapi/fpm/fpm/fpm_main.c:2072
(gdb) quit



Information about the other pkgs installed:

ii  mysql-common 5.5.53-0+deb8u1                    all          MySQL 
database common files, e.g. /etc/mysql/my.cnf
ii  mysql-server 5.5.53-0+deb8u1                    all          MySQL 
database server (metapackage depending on the latest version)
ii  mysql-server-5.5 5.5.53-0+deb8u1                    amd64        
MySQL database server binaries and system database setup
ii  mysql-server-core-5.5 5.5.53-0+deb8u1                    
amd64        MySQL database server binaries
ii  php5-mysql 5.6.29+dfsg-0+deb8u1               amd64        MySQL 
module for php5
ii  nginx-common 1.6.2-5+deb8u4                     all          small, 
powerful, scalable web/proxy server - common files
ii  nginx-extras 1.6.2-5+deb8u4                     amd64        nginx 
web/proxy server (extended version)

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