Edit report at https://bugs.php.net/bug.php?id=62475&edit=1
ID: 62475
Comment by: user at kkdf2 dot sakura dot ne dot jp
Reported by: deadb17ch at gmail dot com
Summary: variant_* functions causes crash when null given as
an argument
Status: Open
Type: Bug
Package: COM related
Operating System: Windows XP SP3
PHP Version: 5.4.4
Block user comment: N
Private report: N
New Comment:
z is NULL, and then Z_TYPE_P(z) gets access violation, because
zend_parse_parameters eats "z!z!". It may be safe with "zz".
---
PHP_COM_DOTNET_API void php_com_variant_from_zval(VARIANT *v, zval *z, int
codepage TSRMLS_DC)
{
OLECHAR *olestring;
php_com_dotnet_object *obj;
switch (Z_TYPE_P(z)) {
case IS_NULL:
V_VT(v) = VT_NULL;
break;
---
Previous Comments:
------------------------------------------------------------------------
[2012-07-03 20:56:12] deadb17ch at gmail dot com
Description:
------------
As we can read in the php manual :
"As with all the variant arithmetic functions, the parameters for this function
can be either a PHP native type (integer, string, floating point, boolean or
NULL), or an instance of a COM, VARIANT or DOTNET class. ...."
but actuall php instance crashes when we give NULL as first or second argument
to some of the functions from variant_* familly.
Thoes functions are:
variant_neg
variant_pow
variant_cat
variant_div
variant_fix
variant_idiv
variant_imp
variant_int
variant_mod
variant_mul
variant_neg
variant_not
variant_rount
variant_set
variant_sub
variant_xor
variant_or
variant_eqv
variant_cmp
variant_abs
variant_and
Test script:
---------------
<?php variant_pow(null, 1); ?>
<?php variant_neg(null); ?>
Expected result:
----------------
nothing happens or an error occurs
Actual result:
--------------
crash
eax=00000000 ebx=01250080 ecx=00c0fac8 edx=1039bac6 esi=00000000 edi=00c0fac8
eip=100f4036 esp=00c0fa90 ebp=02296f08 iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00200246
*** ERROR: Symbol file could not be found. Defaulted to export symbols for
C:\\xampp\\php\\php5ts.dll -
php5ts!php_com_variant_from_zval+0x6:
100f4036 0fb6460c movzx eax,byte ptr [esi+0Ch] ds:0023:0000000c=??
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=62475&edit=1
