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Merge branch 'PHP-8.4' into PHP-8.5

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* PHP-8.4:
  Fix GH-20622: imagestring/imagestringup overflow/underflow.
This commit is contained in:
David Carlier
2025-12-04 23:16:08 +00:00
parent f39ae2fc67 2c2852ae8e
commit 400aa844a6
2 changed files with 18 additions and 4 deletions
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9
ext/gd/gd.c
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@@ -2976,7 +2976,8 @@ static void php_imagechar(INTERNAL_FUNCTION_PARAMETERS, int mode)
zend_long X, Y, COL;
zend_string *C;
gdImagePtr im;
int ch = 0, col, x, y, i;
int ch = 0, col, i, l = 0;
unsigned int x, y;
size_t l = 0;
unsigned char *str = NULL;
zend_object *font_obj = NULL;
@@ -3009,21 +3010,21 @@ static void php_imagechar(INTERNAL_FUNCTION_PARAMETERS, int mode)
switch (mode) {
case 0:
gdImageChar(im, font, x, y, ch, col);
gdImageChar(im, font, (int)x, (int)y, ch, col);
break;
case 1:
php_gdimagecharup(im, font, x, y, ch, col);
break;
case 2:
for (i = 0; (i < l); i++) {
gdImageChar(im, font, x, y, (int) ((unsigned char) str[i]), col);
gdImageChar(im, font, (int)x, (int)y, (int) ((unsigned char) str[i]), col);
x += font->w;
}
break;
case 3: {
for (i = 0; (i < l); i++) {
/* php_gdimagecharup(im, font, x, y, (int) str[i], col); */
gdImageCharUp(im, font, x, y, (int) str[i], col);
gdImageCharUp(im, font, (int)x, (int)y, (int) str[i], col);
y -= font->w;
}
break;

13
ext/gd/tests/gh20622.phpt Normal file
View File

@@ -0,0 +1,13 @@
--TEST--
GH-20622 (imagestring/imagestringup overflow/underflow)
--EXTENSIONS--
gd
--FILE--
<?php
$im = imagecreate(64, 64);
imagestringup($im, 5, 0, -2147483648, 'STRINGUP', 0);
imagestring($im, 5, -2147483648, 0, 'STRING', 0);
echo "OK";
?>
--EXPECT--
OK