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src: perform bounds checking on error source line #33645

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src: perform bounds checking on error source line #33645

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src: perform bounds checking on error source line
addaleax May 29, 2020
e9e7286
fixup! src: perform bounds checking on error source line
addaleax May 30, 2020
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fixup! src: perform bounds checking on error source line
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@addaleax
addaleax committed May 30, 2020
commit e9e7286bf0b2c02ef797ee5847720d1eecfa9e94
4 changes: 2 additions & 2 deletions src/node_errors.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -114,8 +114,9 @@ static std::string GetErrorSource(Isolate* isolate,
linenum,
sourceline.c_str());
CHECK_GT(buf.size(), 0);
*added_exception_line = true;

if (start >= end ||
if (start > end ||
start < 0 ||
static_cast<size_t>(end) > sourceline.size()) {
return buf;
Expand All @@ -142,7 +143,6 @@ static std::string GetErrorSource(Isolate* isolate,
CHECK_LE(off, kUnderlineBufsize);
underline_buf[off++] = '\n';

*added_exception_line = true;
return buf + std::string(underline_buf, off);
}

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