allow self type

mypy/checkmember.py

@@ -1086,7 +1086,7 @@ def analyze_class_attribute_access(
             if not node.node.is_classvar and node.node.info.self_type:
                 def_vars.add(node.node.info.self_type)
             typ_vars = set(get_type_vars(t))
-            if def_vars & typ_vars:
+            if any(tv for tv in def_vars & typ_vars if tv.upper_bound != itype):
                 if node.node.is_classvar:
                     message = message_registry.GENERIC_CLASS_VAR_ACCESS
                 else:

test-data/unit/check-generics.test

@@ -2233,6 +2233,22 @@ xi = C[int].x  # E: Access to generic instance variables via class is ambiguous
 reveal_type(xi)  # N: Revealed type is "builtins.int"
 [builtins fixtures/classmethod.pyi]
 
+[case testGenericClassAttrSelfType]
+from typing import TypeVar, Generic, Self, Type, Mapping
+
+class A:
+    d: Mapping[str, Self]
+
+    @classmethod
+    def make(cls) -> Self:
+        return cls.d["asdf"]
+
+def main(A_t: Type[A]) -> None:
+    reveal_type(A.d)  # N: Revealed type is "typing.Mapping[builtins.str, __main__.A]"
+    reveal_type(A_t.d)  # N: Revealed type is "typing.Mapping[builtins.str, __main__.A]"
+
+[builtins fixtures/classmethod.pyi]
+
 [case testGenericClassAttrUnboundOnSubClass]
 from typing import Generic, TypeVar, Tuple
 T = TypeVar('T')