oomd: add unit test to repro #18926

(cherry picked from commit 399d80ba8c604d57e7df6c5118ea3258cce026d9)

diff --git a/src/oom/test-oomd-util.c b/src/oom/test-oomd-util.c
index 5df57107f9cdde9167d2d7ccfef616547d9c784a..5abad11fbad53317fd999a255c555d179f80d802 100644 (file)
--- a/src/oom/test-oomd-util.c
+++ b/src/oom/test-oomd-util.c
@@ -122,6 +122,7 @@ static void test_oomd_cgroup_context_acquire_and_insert(void) {
         assert_se(oomd_insert_cgroup_context(NULL, h1, cgroup) == 0);
         c1 = hashmap_get(h1, cgroup);
         assert_se(c1);
+        assert_se(oomd_insert_cgroup_context(NULL, h1, cgroup) == -EEXIST);
 
          /* make sure certain values from h1 get updated in h2 */
         c1->pgscan = 5555;