[unixODBC-support] Posible SEGFAULT when Fetching a null datetime in Informix

Emiliano Romero eromero at sitrack.com
Thu Jan 24 19:20:47 GMT 2008

Hi!, I’m have installed unixODBC+pdo_odbc. I’m using it with Informix IDS

It works perfectly until I try to fetch a row with a datetime field = null.
It generates a SEGFAULT in apache. If the datetime field has any value, it
works perfectly. But with a null value it crash.


Any idea of what could be happening?


I paste the Backtrace of the coredump


Core was generated by `/usr/sbin/apache2-php5 -D PHP5 -D DEFAULT_VHOST -D
INFO -d /usr/lib64/apache2-p'.

Program terminated with signal 11, Segmentation fault.

#0  0x00002b6375fe029c in memcpy () from /lib/libc.so.6

(gdb) bt

#0  0x00002b6375fe029c in memcpy () from /lib/libc.so.6

#1  0x00000000ffffffff in ?? ()

#2  0x0000000000e0a908 in ?? ()

#3  0x0000000000c94d78 in ?? ()

#4  0x0000000000000090 in ?? ()

#5  0x0000000000e0aa98 in ?? ()

#6  0x00002b6378d9de40 in _estrndup () from

#7  0x00002b637b38a7e6 in fetch_value (stmt=0xe00031, dest=0xe086e0,
colno=<value optimized out>,

    type_override=<value optimized out>) at

#8  0x00002b637b38b05e in do_fetch (stmt=0xc94d78, do_bind=<value optimized
out>, return_value=0xdfe9f8, how=14680984,

    ori=<value optimized out>, offset=<value optimized out>, return_all=0x0)
at /tmp/pear/download/PDO-1.0.3/pdo_stmt.c:967

#9  0x00002b637b38c44b in zim_PDOStatement_fetch (ht=<value optimized out>,

    return_value_ptr=<value optimized out>, this_ptr=<value optimized out>,
return_value_used=<value optimized out>)

    at /tmp/pear/download/PDO-1.0.3/pdo_stmt.c:1227

#10 0x00002b6378dd35b2 in ?? () from

#11 0x00002b6378dd26e2 in execute () from

#12 0x00002b6378dd2e73 in ?? () from

#13 0x00002b6378dd26e2 in execute () from

#14 0x00002b6378dd2e73 in ?? () from

#15 0x00002b6378dd26e2 in execute () from

#16 0x00002b6378db5956 in zend_execute_scripts () from

#17 0x00002b6378d77a6a in php_execute_script () from

#18 0x00002b6378e2b293 in ?? () from

#19 0x0000000000431293 in ap_run_handler ()

#20 0x0000000000434136 in ap_invoke_handler ()

#21 0x000000000043d8ee in ap_process_request ()

#22 0x000000000043b056 in ?? ()

#23 0x0000000000437a24 in ap_run_process_connection ()

#24 0x0000000000441099 in ?? ()

#25 0x00000000004412e8 in ?? ()

#26 0x0000000000441ae2 in ap_mpm_run ()

#27 0x0000000000420a39 in main ()


Sorry if the problem isnt in unixODBC.


Thanks and Regards

Emiliano S. Romero

Sitrack.com Argentina S.A. 

E-mail: eromero at sitrack.com


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