[NFC][analyzer][docs] Crosslink MallocChecker's ownership attributes (#121939)

Forgot to mention these in the checker docs.

Author: Szelethus

clang/docs/analyzer/checkers.rst

@@ -476,6 +476,9 @@ cplusplus.NewDelete (C++)
 """""""""""""""""""""""""
 Check for double-free and use-after-free problems. Traces memory managed by new/delete.
 
+Custom allocation/deallocation functions can be defined using
+:ref:`ownership attributes<analyzer-ownership-attrs>`.
+
 .. literalinclude:: checkers/newdelete_example.cpp
     :language: cpp
 
@@ -485,6 +488,9 @@ cplusplus.NewDeleteLeaks (C++)
 """"""""""""""""""""""""""""""
 Check for memory leaks. Traces memory managed by new/delete.
 
+Custom allocation/deallocation functions can be defined using
+:ref:`ownership attributes<analyzer-ownership-attrs>`.
+
 .. code-block:: cpp
 
  void test() {
@@ -1263,6 +1269,9 @@ You can silence this warning either by bound checking the ``size`` parameter, or
 by explicitly marking the ``size`` parameter as sanitized. See the
 :ref:`optin-taint-GenericTaint` checker for an example.
 
+Custom allocation/deallocation functions can be defined using
+:ref:`ownership attributes<analyzer-ownership-attrs>`.
+
 .. code-block:: c
 
   void vulnerable(void) {
@@ -1857,6 +1866,9 @@ unix.Malloc (C)
 """""""""""""""
 Check for memory leaks, double free, and use-after-free problems. Traces memory managed by malloc()/free().
 
+Custom allocation/deallocation functions can be defined using
+:ref:`ownership attributes<analyzer-ownership-attrs>`.
+
 .. literalinclude:: checkers/unix_malloc_example.c
     :language: c
 
@@ -1866,6 +1878,9 @@ unix.MallocSizeof (C)
 """""""""""""""""""""
 Check for dubious ``malloc`` arguments involving ``sizeof``.
 
+Custom allocation/deallocation functions can be defined using
+:ref:`ownership attributes<analyzer-ownership-attrs>`.
+
 .. code-block:: c
 
  void test() {
@@ -1881,6 +1896,9 @@ unix.MismatchedDeallocator (C, C++)
 """""""""""""""""""""""""""""""""""
 Check for mismatched deallocators.
 
+Custom allocation/deallocation functions can be defined using
+:ref:`ownership attributes<analyzer-ownership-attrs>`.
+
 .. literalinclude:: checkers/mismatched_deallocator_example.cpp
     :language: c
 

clang/include/clang/Basic/AttrDocs.td

@@ -1393,6 +1393,7 @@ def OwnershipDocs : Documentation {
   let Heading = "ownership_holds, ownership_returns, ownership_takes (Clang "
                 "Static Analyzer)";
   let Category = DocCatFunction;
+  let Label = "analyzer-ownership-attrs";
   let Content = [{
 
 .. note::