From: antony at zend dot com
Operating system: Linux
PHP version: 5.1.0RC1
PHP Bug Type: Reproducible crash
Bug description: mysqli::init() and others use wrong $this pointer without
checks
Description:
------------
mysqli::init(), mysqli::connect() and mysqli_warning::__construct() use
wrong inherited $this pointer without checking if this_ptr really points
to the mysqli_object.
In particular conditions this can lead to segfault.
Reproduce code:
---------------
class DbConnection {
private $link = NULL;
public function connect() {
$this->link = mysqli::init();
var_dump($this->link);
}
}
$db = new DbConnection();
$db->connect();
Actual result:
--------------
*** glibc detected *** free(): invalid pointer: 0xbfffece4 ***
Program received signal SIGABRT, Aborted.
[Switching to Thread 1076990336 (LWP 24078)]
0xffffe410 in ?? ()
(gdb) bt
#0 0xffffe410 in ?? ()
#1 0xbfffe224 in ?? ()
#2 0x00000006 in ?? ()
#3 0x00005e0e in ?? ()
#4 0x400ec2c1 in raise () from /lib/tls/libc.so.6
#5 0x400edb75 in abort () from /lib/tls/libc.so.6
#6 0x401207aa in __libc_message () from /lib/tls/libc.so.6
#7 0x40126007 in malloc_printerr () from /lib/tls/libc.so.6
#8 0x401276cb in free () from /lib/tls/libc.so.6
#9 0x080c1364 in mysqli_objects_destroy_object (object=0x85585a8,
handle=3) at /usr/src/dev/orig/php-src_5_1/ext/mysqli/mysqli.c:152
#10 0x0826ed46 in zend_objects_store_call_destructors (objects=0x84b36ec)
at /usr/src/dev/orig/php-src_5_1/Zend/zend_objects_API.c:55
#11 0x08249416 in shutdown_destructors () at
/usr/src/dev/orig/php-src_5_1/Zend/zend_execute_API.c:190
#12 0x082559a6 in zend_call_destructors () at
/usr/src/dev/orig/php-src_5_1/Zend/zend.c:817
#13 0x08214b38 in php_request_shutdown (dummy=0x0) at
/usr/src/dev/orig/php-src_5_1/main/main.c:1210
#14 0x082c1093 in main (argc=2, argv=0xbfffefb4) at
/usr/src/dev/orig/php-src_5_1/sapi/cli/php_cli.c:1142
--
Edit bug report at http://bugs.php.net/?id=34810&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=34810&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=34810&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=34810&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=34810&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=34810&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=34810&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=34810&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=34810&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=34810&r=support
Expected behavior: http://bugs.php.net/fix.php?id=34810&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=34810&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=34810&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=34810&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=34810&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=34810&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=34810&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=34810&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=34810&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=34810&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=34810&r=mysqlcfg
