Fix a potential OOB error in SSZ deserialization

2019-09-27 19:48:12 +03:00 · 2019-09-27 19:48:12 +03:00 · a336285922
parent c39d4f1817
commit a336285922
1 changed files with 2 additions and 1 deletions
--- a/beacon_chain/ssz/bytes_reader.nim
+++ b/beacon_chain/ssz/bytes_reader.nim
@ -80,6 +80,7 @@ proc readSszValue*(input: openarray[byte], T: type): T =
    type ElemType = type result[0]
    when ElemType is byte|char:
      result.setLen input.len
+      if input.len > 0:
        copyMem(addr result[0], unsafeAddr input[0], input.len)

    elif isFixedSize(ElemType):