diff --git a/commit-reach.c b/commit-reach.c
index 4b7c233fd4..a868a575ea 100644
--- a/commit-reach.c
+++ b/commit-reach.c
@@ -173,6 +173,7 @@ struct commit_list *get_octopus_merge_bases(struct commit_list *in)
 			for (k = bases; k; k = k->next)
 				end = k;
 		}
+		free_commit_list(ret);
 		ret = new_commits;
 	}
 	return ret;
diff --git a/t/t5521-pull-options.sh b/t/t5521-pull-options.sh
index 264de29c35..079b2f2536 100755
--- a/t/t5521-pull-options.sh
+++ b/t/t5521-pull-options.sh
@@ -5,6 +5,7 @@ test_description='pull options'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '