Fix length checking overflow in EVM revert reason parsing #820
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boundless-forest
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Aug 15, 2022
…vm#820) * Fix length checking overflow in EVM revert reason parsing * Remove unused debug_assert
nanocryk
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Aug 16, 2022
…vm#820) * Fix length checking overflow in EVM revert reason parsing * Remove unused debug_assert
abhijeetbhagat
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Jan 11, 2023
…vm#820) * Fix length checking overflow in EVM revert reason parsing * Remove unused debug_assert
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Our current code in parsing the EVM revert reason is incorrect in two ways. First, the length is a big-endian encoded U256, not a simple sum. Second, the current summing function uses the accumulator type of
u8which will overflow easily. The current code only works because most EVM revert reasons are not larger than 256 bytes.