[PATCH v4 47/72] selftests/namespaces: ninth listns() test
From: Christian Brauner <brauner@kernel.org>
Date: 2025-10-29 12:24:37
Also in:
bpf, cgroups, linux-fsdevel, lkml
Subsystem:
kernel selftest framework, the rest · Maintainers:
Shuah Khan, Linus Torvalds
Test error cases for listns(). Signed-off-by: Christian Brauner <brauner@kernel.org> --- tools/testing/selftests/namespaces/listns_test.c | 49 ++++++++++++++++++++++++ 1 file changed, 49 insertions(+)
diff --git a/tools/testing/selftests/namespaces/listns_test.c b/tools/testing/selftests/namespaces/listns_test.c
index d3be6f97d34e..8a95789d6a87 100644
--- a/tools/testing/selftests/namespaces/listns_test.c
+++ b/tools/testing/selftests/namespaces/listns_test.c@@ -627,4 +627,53 @@ TEST(listns_hierarchical_visibility) waitpid(pid, &status, 0); } +/* + * Test error cases for listns(). + */ +TEST(listns_error_cases) +{ + struct ns_id_req req = { + .size = sizeof(req), + .spare = 0, + .ns_id = 0, + .ns_type = 0, + .spare2 = 0, + .user_ns_id = 0, + }; + __u64 ns_ids[10]; + int ret; + + /* Test with invalid flags */ + ret = sys_listns(&req, ns_ids, ARRAY_SIZE(ns_ids), 0xFFFF); + if (errno == ENOSYS) { + /* listns() not supported, skip this check */ + } else { + ASSERT_LT(ret, 0); + ASSERT_EQ(errno, EINVAL); + } + + /* Test with NULL ns_ids array */ + ret = sys_listns(&req, NULL, 10, 0); + ASSERT_LT(ret, 0); + + /* Test with invalid spare field */ + req.spare = 1; + ret = sys_listns(&req, ns_ids, ARRAY_SIZE(ns_ids), 0); + if (errno == ENOSYS) { + /* listns() not supported, skip this check */ + } else { + ASSERT_LT(ret, 0); + ASSERT_EQ(errno, EINVAL); + } + req.spare = 0; + + /* Test with huge nr_ns_ids */ + ret = sys_listns(&req, ns_ids, 2000000, 0); + if (errno == ENOSYS) { + /* listns() not supported, skip this check */ + } else { + ASSERT_LT(ret, 0); + } +} + TEST_HARNESS_MAIN
--
2.47.3