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Segmentation fault in main/spprintf.c #16009

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YuanchengJiang opened this issue Sep 23, 2024 · 0 comments
Open

Segmentation fault in main/spprintf.c #16009

YuanchengJiang opened this issue Sep 23, 2024 · 0 comments
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Bug Category: JIT Status: Verified

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@YuanchengJiang
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Description

The following code:

<?php
$dom = DOM\XMLDocument::createFromString(<<<XML
<html xmlns="http://www.w3.org/1999/xhtml">
<input type="text" placeholder="" />
<textarea placeholder="" />
<input xmlns="" type="text" placeholder="" />
<textarea xmlns="" placeholder="" />
<input type="text" />
<textarea />
</html>
XML);
$fusion = $dom;
function testMin2First(int $value): int {
        $value = min($value, 100);
        return $value;
}
function testMin2Second(int $fusion): int {
        $value = min(100, $value);
        return $value;
}
function testMin2_TMP(int $value): int {
        $value = min($value + 1, 100);
        return $value;
}
var_dump(testMin2First(5));
var_dump(testMin2Second(5));
?>

Resulted in this output:

/php-src/main/spprintf.c:376:14: runtime error: member access within misaligned address 0x200238000000002 for type 'zend_string' (aka 'struct _zend_string'), which requires 8 byte alignment

To reproduce:

-d "extension_dir=/php-src/modules/" -d "zend_extension=/php-src/modules/opcache.so" -d "opcache.enable=1" -d "opcache.enable_cli=1" -d "opcache.jit=1012"

PHP Version

PHP 8.4.0-dev

Operating System

ubuntu 22.04
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Bug Category: JIT Status: Verified
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2 participants
@cmb69 @YuanchengJiang