Move CALLF immediate argument validation to validate_instructions() (#662)

Author: gumb0

lib/evmone/eof.cpp

@@ -224,6 +224,13 @@ EOFValidationError validate_instructions(
             if (i >= code.size())
                 return EOFValidationError::truncated_instruction;
         }
+        else if (op == OP_CALLF)
+        {
+            const auto fid = read_uint16_be(&code[i + 1]);
+            if (fid >= header.types.size())
+                return EOFValidationError::invalid_code_section_index;
+            i += 2;
+        }
         else if (op == OP_DATALOADN)
         {
             const auto index = read_uint16_be(&code[i + 1]);
@@ -328,9 +335,6 @@ std::variant<EOFValidationError, int32_t> validate_max_stack_height(
         {
             const auto fid = read_uint16_be(&code[i + 1]);
 
-            if (fid >= code_types.size())
-                return EOFValidationError::invalid_code_section_index;
-
             stack_height_required = static_cast<int8_t>(code_types[fid].inputs);
             stack_height_change =
                 static_cast<int8_t>(code_types[fid].outputs - stack_height_required);

test/unittests/eof_validation_test.cpp

@@ -725,6 +725,15 @@ TEST(eof_valication, max_stack_heigh)
     }
 }
 
+TEST(eof_validation, EOF1_callf_truncated)
+{
+    EXPECT_EQ(validate_eof("EF0001 010004 0200010001 030000 00 00000000 B0"),
+        EOFValidationError::truncated_instruction);
+
+    EXPECT_EQ(validate_eof("EF0001 010004 0200010002 030000 00 00000000 B000"),
+        EOFValidationError::truncated_instruction);
+}
+
 TEST(eof_validation, callf_invalid_code_section_index)
 {
     EXPECT_EQ(validate_eof("EF0001 010004 0200010004 030000 00 00000000 b0000100"),