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Reduce range of cleanMemRef

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coffeepots 2018-08-16 20:19:53 +01:00 committed by zah
parent fd7062fecb
commit c9de0fbd29
1 changed files with 3 additions and 2 deletions
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5
nimbus/vm/interpreter/opcodes_impl.nim
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@ -235,9 +235,10 @@ proc writePaddedResult(mem: var Memory,
func cleanMemRef(x: UInt256): int {.inline.} = func cleanMemRef(x: UInt256): int {.inline.} =
## Sanitize memory addresses, catch negative or impossibly big offsets ## Sanitize memory addresses, catch negative or impossibly big offsets
# See https://github.com/status-im/nimbus/pull/97 for more info # See https://github.com/status-im/nimbus/pull/97 for more info
const upperBound = high(int32).u256 # For rational on shr, see https://github.com/status-im/nimbus/pull/101
const upperBound = (high(int32) shr 2).u256
if x > upperBound: if x > upperBound:
return high(int32) return high(int32) shr 2
return x.toInt return x.toInt
op address, inline = true: op address, inline = true: