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EVM: fix EOF failures found by fuzzer #3568

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EVM: fix EOF failures found by fuzzer #3568

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1a8e23a
evm: fix swapn stack validation
jochem-brouwer Aug 7, 2024
d8f6f80
Merge branch 'master' into eof-fixes
holgerd77 Oct 9, 2024
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4 changes: 1 addition & 3 deletions packages/evm/src/eof/verify.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -368,9 +368,7 @@ function validateOpcodes(
} else if (opcode === 0xe7) {
// SWAPN
const toSwap = code[ptr + 1]
// TODO: EVMONEs test wants this to be `toSwap + 2`, but that seems to be incorrect
// Will keep `toSwap + 1` for now
if (toSwap + 1 > minStackCurrent) {
if (toSwap + 2 > minStackCurrent) {
validationError(EOFError.StackUnderflow)
}
} else if (opcode === 0xe8) {
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