Edit report at https://bugs.php.net/bug.php?id=69757&edit=1
ID: 69757
Updated by: ab@php.net
Reported by: miracle at rpz dot name
Summary: Segmentation fault on nextRowset
-Status: Open
+Status: Closed
Type: Bug
Package: PDO DBlib
Operating System: Linux
PHP Version: 5.6.9
-Assigned To:
+Assigned To: ab
Block user comment: N
Private report: N
New Comment:
PR 1386 was merged into 5.6 and up.
Thanks.
Previous Comments:
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[2015-07-07 18:23:16] miracle+php at rpz dot name
Duplicate for #67130
------------------------------------------------------------------------
[2015-06-25 22:52:00] miracle at rpz dot name
--- orig/ext/pdo_dblib/dblib_stmt.c 2015-05-14 02:13:33.000000000 +0300
+++ fixes/ext/pdo_dblib/dblib_stmt.c 2015-06-26 01:45:16.392471563 +0300
@@ -204,7 +204,15 @@
struct pdo_column_data *col = &stmt->columns[colno];
- col->name = (char*)dbcolname(H->link, colno+1);
+ char *fname = (char*)dbcolname(H->link, colno+1);
+ char computed_buf[16];
+ if (*fname) {
+ col->name = estrdup(fname);
+ } else {
+ snprintf(computed_buf,16,"computed%d", colno);
+ col->name = estrdup(computed_buf);
+ }
+
col->maxlen = dbcollen(H->link, colno+1);
col->namelen = strlen(col->name);
col->param_type = PDO_PARAM_STR;
Correct whether such a "patch" ?
------------------------------------------------------------------------
[2015-06-04 19:48:34] miracle at rpz dot name
Description:
------------
php configured --with-pdo-dblib=shared,/usr
After fetch first (any) resultset PDOStatement::nextRowset() cause segmentation fault instead of
return boolean result.
Segfault reproduced with php 5.4.41, 5.5.25, 5.6.9; freetds: 0.91, 0.95rc3
Test script:
---------------
<?php
if (!extension_loaded('pdo_dblib')) {
die('skip not loaded');
}
require __DIR__ . '/config.inc';
$sql = "
EXEC sp_executesql N'
SELECT 1 as first_rowset
SELECT 2 as second_rowset
'
";
//$sql = 'SELECT 1 as first_rowset'; // same result: segfault
$stmt = $db->query($sql);
$resultset1 = $stmt->fetchAll(PDO::FETCH_ASSOC);
//var_dump($resultset1); // first_rowset => 1
$stmt->nextRowset(); //segfault here
Actual result:
--------------
Core was generated by `php pdo_dblib_next_rowset_segfault.php'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000000000067c6d8 in zend_mm_check_ptr (heap=0x1493b20, ptr=0x16f2308, silent=1,
__zend_filename=0x7f1e5d148c08 "/tmp/php-5.6.9/ext/pdo/pdo_stmt.c",
__zend_lineno=2053, __zend_orig_filename=0x0,
__zend_orig_lineno=0) at /tmp/php-5.6.9/Zend/zend_alloc.c:1384
1384 if (p->info._size != ZEND_MM_NEXT_BLOCK(p)->info._prev) {
(gdb) bt
#0 0x000000000067c6d8 in zend_mm_check_ptr (heap=0x1493b20, ptr=0x16f2308, silent=1,
__zend_filename=0x7f1e5d148c08 "/tmp/php-5.6.9/ext/pdo/pdo_stmt.c",
__zend_lineno=2053, __zend_orig_filename=0x0,
__zend_orig_lineno=0) at /tmp/php-5.6.9/Zend/zend_alloc.c:1384
#1 0x000000000067e2d2 in _zend_mm_free_int (heap=0x1493b20, p=0x16f2308,
__zend_filename=0x7f1e5d148c08 "/tmp/php-5.6.9/ext/pdo/pdo_stmt.c",
__zend_lineno=2053, __zend_orig_filename=0x0,
__zend_orig_lineno=0) at /tmp/php-5.6.9/Zend/zend_alloc.c:2068
#2 0x000000000067f75c in _efree (ptr=0x16f2308, __zend_filename=0x7f1e5d148c08
"/tmp/php-5.6.9/ext/pdo/pdo_stmt.c",
__zend_lineno=2053, __zend_orig_filename=0x0, __zend_orig_lineno=0) at
/tmp/php-5.6.9/Zend/zend_alloc.c:2440
#3 0x00007f1e5d1441d7 in pdo_stmt_do_next_rowset (stmt=0x7f1e61a76ad0) at
/tmp/php-5.6.9/ext/pdo/pdo_stmt.c:2053
#4 0x00007f1e5d144333 in zim_PDOStatement_nextRowset (ht=0, return_value=0x7f1e61a77960,
return_value_ptr=0x7f1e64250200,
this_ptr=0x7f1e61a76c90, return_value_used=0) at /tmp/php-5.6.9/ext/pdo/pdo_stmt.c:2082
#5 0x00000000006fd188 in zend_do_fcall_common_helper_SPEC (execute_data=0x7f1e642503b8)
at /tmp/php-5.6.9/Zend/zend_vm_execute.h:558
#6 0x00000000006fd95c in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER (execute_data=0x7f1e642503b8)
at /tmp/php-5.6.9/Zend/zend_vm_execute.h:693
#7 0x00000000006fc7f1 in execute_ex (execute_data=0x7f1e642503b8) at
/tmp/php-5.6.9/Zend/zend_vm_execute.h:363
#8 0x00000000006fc87a in zend_execute (op_array=0x7f1e6428cf30) at
/tmp/php-5.6.9/Zend/zend_vm_execute.h:388
#9 0x00000000006b9058 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at
/tmp/php-5.6.9/Zend/zend.c:1341
#10 0x00000000006242af in php_execute_script (primary_file=0x7ffd72f96120) at
/tmp/php-5.6.9/main/main.c:2597
#11 0x000000000076ad09 in do_cli (argc=2, argv=0x1493870) at /tmp/php-5.6.9/sapi/cli/php_cli.c:994
#12 0x000000000076be16 in main (argc=2, argv=0x1493870) at /tmp/php-5.6.9/sapi/cli/php_cli.c:1378
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Edit this bug report at https://bugs.php.net/bug.php?id=69757&edit=1