#25161 [Opn->Fbk]: Segmentation fault executing php_sybase_query
| From: | sniper@php.net | Date: | Wed, 20 Aug 2003 00:10:40 +0000 |
| Subject: | #25161 [Opn->Fbk]: Segmentation fault executing php_sybase_query | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-46257@lists.php.net to get a copy of this message | ||
ID: 25161
Updated by: sniper@php.net
Reported By: nerijus at kis dot lt
-Status: Open
+Status: Feedback
Bug Type: Sybase-ct (ctlib) related
Operating System: 5.1-CURRENT (501105)
PHP Version: 4.3.3RC4
New Comment:
Not enough information was provided for us to be able
to handle this bug. Please re-read the instructions at
http://bugs.php.net/how-to-report.php
If you can provide more information, feel free to add it
to this bug and change the status back to "Open".
Thank you for your interest in PHP.
(and what OS is '5.1-CURRENT (501105)' anyway?)
Previous Comments:
------------------------------------------------------------------------
[2003-08-19 19:07:28] nerijus at kis dot lt
some fields in this loop get negative result->datafmt[i].datatype and
negative result->datafmt[i].maxlength then emalloc() cound not allocate
memory
p.s. sorrry from my english
------------------------------------------------------------------------
[2003-08-19 19:03:56] nerijus at kis dot lt
Description:
------------
in some sql queryes i have Segmentation fault.
As i see it mey be in php sysbase_ct code or in self freedts
Reproduce code:
---------------
for (i=0; i<num_fields; i++) {
ct_describe(sybase_ptr->cmd, i+1,
&result->datafmt[i]);
result->types[i] = result->datafmt[i].datatype;
switch (result->datafmt[i].datatype) {
............. skip ........
break;
default:
result->datafmt[i].maxlength++;
result->numerics[i] = 0;
break;
}
result->tmp_buffer[i] =
(char*)emalloc(result->datafmt[i].maxlength);
Expected result:
----------------
Normal sysbase_query() result variable
Actual result:
--------------
(gdb) bt
#0 0x2829932f in kill () from /lib/libc.so.5
#1 0x08129c7a in _emalloc (size=136172324, __zend_filename=0x0,
__zend_lineno=1,
__zend_orig_filename=0xfffffff7 <Error reading address 0xfffffff7:
Bad address>,
__zend_orig_lineno=4294867297) at
/usr/ports/lang/php4/work/php-4.3.3RC4/Zend/zend_alloc.c:166
#2 0x080f324f in php_sybase_fetch_result_set (sybase_ptr=0x81dd324,
buffered=0, store=0)
at
/usr/ports/lang/php4/work/php-4.3.3RC4/ext/sybase_ct/php_sybase_ct.c:1178
#3 0x080f3994 in php_sybase_query (ht=0, return_value=0x81e40e4,
this_ptr=0x0, return_value_used=1,
buffered=0) at
/usr/ports/lang/php4/work/php-4.3.3RC4/ext/sybase_ct/php_sybase_ct.c:1363
#4 0x080f3cae in zif_sybase_query (ht=0, return_value=0x0,
this_ptr=0x0, return_value_used=0)
at
/usr/ports/lang/php4/work/php-4.3.3RC4/ext/sybase_ct/php_sybase_ct.c:1476
#5 0x0814dbe0 in execute (op_array=0x81dd2a4)
at /usr/ports/lang/php4/work/php-4.3.3RC4/Zend/zend_execute.c:1616
#6 0x0813c08b in zend_execute_scripts (type=8, retval=0x0,
file_count=3)
at /usr/ports/lang/php4/work/php-4.3.3RC4/Zend/zend.c:885
#7 0x08108c86 in php_execute_script (primary_file=0xbfbffb80)
at /usr/ports/lang/php4/work/php-4.3.3RC4/main/main.c:1721
#8 0x08153e25 in main (argc=2, argv=0xbfbffbe0)
at /usr/ports/lang/php4/work/php-4.3.3RC4/sapi/cli/php_cli.c:818
#9 0x0805f3f2 in _start ()
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=25161&edit=1