Test invalid chunked body

aiohttp/_http_parser.pyx

@@ -453,11 +453,14 @@ cdef class HttpParser:
                 upgrade, chunked)
 
         if (
-            ULLONG_MAX > self._cparser.content_length > 0 or chunked or
-            self._cparser.method == cparser.HTTP_CONNECT or
-            (self._cparser.status_code >= 199 and
-             self._cparser.content_length == 0 and
-             self._read_until_eof)
+            self._response_with_body
+            and (
+                 ULLONG_MAX > self._cparser.content_length > 0 or chunked or
+                 self._cparser.method == cparser.HTTP_CONNECT or
+                 (self._cparser.status_code >= 199 and
+                  self._cparser.content_length == 0 and
+                  self._read_until_eof)
+            )
         ):
             payload = StreamReader(
                 self._protocol, timer=self._timer, loop=self._loop,
@@ -469,9 +472,6 @@ cdef class HttpParser:
         if encoding is not None and self._auto_decompress:
             self._payload = DeflateBuffer(payload, encoding)
 
-        if not self._response_with_body:
-            payload = EMPTY_PAYLOAD
-
         self._messages.append((msg, payload))
 
     cdef _on_message_complete(self):

tests/test_http_parser.py

@@ -1361,6 +1361,20 @@ def test_parse_payload_response_without_body(
     assert payload.is_eof()
 
 
+def test_parse_payload_response_with_invalid_body(
+    loop: asyncio.AbstractEventLoop,
+    protocol: BaseProtocol,
+    response_cls: Type[HttpResponseParser],
+) -> None:
+    parser = response_cls(protocol, loop, 2**16, response_with_body=False)
+    text = (
+        b"HTTP/1.1 200 Ok\r\nTransfer-Encoding: chunked\r\n\r\n"
+        b"7\r\nchunked\r\n0\r\n\r\n"
+    )
+    with pytest.raises(http_exceptions.BadHttpMessage, match="status line"):
+        parser.feed_data(text)[0][0]
+
+
 def test_parse_length_payload(response: HttpResponseParser) -> None:
     text = b"HTTP/1.1 200 Ok\r\ncontent-length: 4\r\n\r\n"
     msg, payload = response.feed_data(text)[0][0]