[PATCH v4 59/72] selftests/namespaces: fifth inactive namespace resurrection test
From: Christian Brauner <brauner@kernel.org>
Date: 2025-10-29 12:25:37
Also in:
bpf, cgroups, linux-fsdevel, lkml
Subsystem:
kernel selftest framework, the rest · Maintainers:
Shuah Khan, Linus Torvalds
Test SIOCGSKNS fails on non-socket file descriptors. Signed-off-by: Christian Brauner <brauner@kernel.org> --- .../testing/selftests/namespaces/siocgskns_test.c | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/tools/testing/selftests/namespaces/siocgskns_test.c b/tools/testing/selftests/namespaces/siocgskns_test.c
index 28e45954c4fa..bbfef3c51ac1 100644
--- a/tools/testing/selftests/namespaces/siocgskns_test.c
+++ b/tools/testing/selftests/namespaces/siocgskns_test.c@@ -307,4 +307,30 @@ TEST(siocgskns_across_setns) close(netns_a_fd); } +/* + * Test SIOCGSKNS fails on non-socket file descriptors. + */ +TEST(siocgskns_non_socket) +{ + int fd; + int pipefd[2]; + + /* Test on regular file */ + fd = open("/dev/null", O_RDONLY); + ASSERT_GE(fd, 0); + + ASSERT_LT(ioctl(fd, SIOCGSKNS), 0); + ASSERT_TRUE(errno == ENOTTY || errno == EINVAL); + close(fd); + + /* Test on pipe */ + ASSERT_EQ(pipe(pipefd), 0); + + ASSERT_LT(ioctl(pipefd[0], SIOCGSKNS), 0); + ASSERT_TRUE(errno == ENOTTY || errno == EINVAL); + + close(pipefd[0]); + close(pipefd[1]); +} + TEST_HARNESS_MAIN
--
2.47.3