chakra-core/ChakraCore

Assertion failure in JavascriptArray::FindHelper()

Open

#6,541 创建于 2020年12月16日

在 GitHub 查看
 (5 评论) (0 反应) (0 负责人)JavaScript (1,374 fork)batch import
Bughelp wanted

仓库指标

Star
 (9,000 star)
PR 合并指标
 (30 天内没有已合并 PR)

描述

Hello, executing following code in ch 1.22.24(debug), an assertion will be thrown.

var buffer = new Int8Array(8);
var func = function (elem) {
    return elem;
};

i = 9007199254740992;
Object.defineProperty(buffer, 'length', { value: i });
Array.prototype.find.call(buffer, func);

output:

ASSERTION 2480: (c:\users\sunlili\documents\workspace\jsenginesfordebug\chakracore-1.11.24\lib\runtime\library\javascriptarray.cpp, line 8558) length <= UINT_MAX
 Failure: (length <= 0xffffffff)
FATAL ERROR: ch.exe failed due to exception code c0000420

9007199254740992 is larger than Math::MAX_SAFE_INTEGER, so ch modified the length to Math::MAX_SAFE_INTEGER(9007199254740991 or 0x1F FFFF FFFF FFFF). Although length is modified larger than buffer's size, there is an index checking in BaseTypedDirectGetItem(__in uint32 index), which gets the real size of buffer, so the bug will not cause OOB access.

ISec Lab. 2020.12.16

贡献者指南