[PATCH v2 4/6] selftests/landlock: Test ioctl with memfds
From: "Günther Noack" <gnoack@google.com>
Date: 2023-06-23 14:44:52
Also in:
linux-fsdevel
Subsystem:
kernel selftest framework, landlock security module, the rest · Maintainers:
Shuah Khan, Mickaël Salaün, Linus Torvalds
Because the ioctl right is associated with the opened file, we expect that it will work with files which are opened by means other than open(2). Signed-off-by: Günther Noack <gnoack@google.com> --- tools/testing/selftests/landlock/fs_test.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
index 0f0899768fe7..ebd93e895775 100644
--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c@@ -3716,18 +3716,20 @@ TEST_F_FORK(ftruncate, open_and_ftruncate_in_different_processes) ASSERT_EQ(0, close(socket_fds[1])); } -TEST(memfd_ftruncate) +TEST(memfd_ftruncate_and_ioctl) { - int fd; + int fd, n; fd = memfd_create("name", MFD_CLOEXEC); ASSERT_LE(0, fd); /* - * Checks that ftruncate is permitted on file descriptors that are - * created in ways other than open(2). + * Checks that operations associated with the opened file + * (ftruncate, ioctl) are permitted on file descriptors that + * are created in ways other than open(2). */ EXPECT_EQ(0, test_ftruncate(fd)); + EXPECT_EQ(0, ioctl(fd, FIONREAD, &n)); ASSERT_EQ(0, close(fd)); }
--
2.41.0.162.gfafddb0af9-goog