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LibWasm: Error when parsed section lengths are invalidated

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Diego 2024-07-08 19:04:48 -07:00 committed by Ali Mohammad Pur
parent aee2f25929
commit afd8d90f32
Notes: sideshowbarker 2024-07-16 23:05:02 +09:00 
Author: https://github.com/dzfrias
Commit: https://github.com/LadybirdBrowser/ladybird/commit/afd8d90f32
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/522
1 changed files with 2 additions and 4 deletions
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6
Userland/Libraries/LibWasm/Parser/Parser.cpp
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@ -1413,10 +1413,8 @@ ParseResult<Module> Module::parse(Stream& stream)
return with_eof_check(stream, ParseError::InvalidModuleVersion);
Vector<AnySection> sections;
for (;;) {
while (!stream.is_eof()) {
auto section_id_or_error = stream.read_value<u8>();
if (stream.is_eof())
break;
if (section_id_or_error.is_error())
return with_eof_check(stream, ParseError::ExpectedIndex);
@ -1472,7 +1470,7 @@ ParseResult<Module> Module::parse(Stream& stream)
default:
return with_eof_check(stream, ParseError::InvalidIndex);
}
if (!section_stream.is_eof())
if (section_stream.remaining() != 0)
return ParseError::SectionSizeMismatch;
}