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Do not apply mutation if it is too large.

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This commit is contained in:
Bhargava Shastry 2021-05-05 22:08:25 +02:00
parent 542395289c
commit eb83ebf1bd
1 changed files with 9 additions and 3 deletions
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12
test/tools/ossfuzz/SolidityCustomMutatorInterface.cpp
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@ -64,7 +64,13 @@ size_t SolidityCustomMutatorInterface::generate()
data,
"Solc custom mutator: Invalid mutant or memory pointer"
);
size_t mutantSize = min(testCase.size(), maxMutantSize - 1);
mempcpy(data, testCase.data(), mutantSize);
return mutantSize;
// Do not apply the mutation if mutant is greater in size than maximum
// permissible. libFuzzer's default max permissible is around 4 KB.
if (testCase.size() > (maxMutantSize - 1))
return size;
else
{
mempcpy(data, testCase.data(), testCase.size());
return testCase.size();
}
}