bpo-46280: Fix tracemalloc_copy_domain() (GH-30591)

Test if tracemalloc_copy_traces() failed to allocated memory in
tracemalloc_copy_domain().

diff --git a/Modules/_tracemalloc.c b/Modules/_tracemalloc.c
index b838439a9cb833b776bd82aa7d0ceaaf6adc51f4..14bad00e4c6291f31e7ecc8122cb38f706e08b7f 100644 (file)
--- a/Modules/_tracemalloc.c
+++ b/Modules/_tracemalloc.c
@@ -1242,6 +1242,9 @@ tracemalloc_copy_domain(_Py_hashtable_t *domains,
     _Py_hashtable_t *traces = (_Py_hashtable_t *)value;
 
     _Py_hashtable_t *traces2 = tracemalloc_copy_traces(traces);
+    if (traces2 == NULL) {
+        return -1;
+    }
     if (_Py_hashtable_set(domains2, TO_PTR(domain), traces2) < 0) {
         _Py_hashtable_destroy(traces2);
         return -1;