Use calldatacopy for selector retrieval to avoid access out of bounds for calldata.

2023-10-03 13:03:40 +00:00 · 2020-06-12 13:02:57 -05:00
parent f4fc095ae0
commit c8d95d601e
4 changed files with 250 additions and 84 deletions
@@ -28,7 +28,9 @@ object \"C_6\" {

            if iszero(lt(calldatasize(), 4))
            {
-                let selector := shift_right_224_unsigned(calldataload(0))
+                mstore(0, 0)
+                calldatacopy(28, 0, 4)
+                let selector := mload(0)
                switch selector

                case 0x26121ff0