From: "Günther Noack" <gnoack@google.com>
To: linux-security-module@vger.kernel.org,
"Mickaël Salaün" <mic@digikod.net>
Cc: "Jeff Xu" <jeffxu@google.com>, "Arnd Bergmann" <arnd@arndb.de>,
"Jorge Lucangeli Obes" <jorgelo@chromium.org>,
"Allen Webb" <allenwebb@google.com>,
"Dmitry Torokhov" <dtor@google.com>,
"Paul Moore" <paul@paul-moore.com>,
"Konstantin Meskhidze" <konstantin.meskhidze@huawei.com>,
"Matt Bobrowski" <repnop@google.com>,
linux-fsdevel@vger.kernel.org,
"Günther Noack" <gnoack@google.com>
Subject: [PATCH v14 04/12] selftests/landlock: Test IOCTL with memfds
Date: Fri, 5 Apr 2024 21:40:32 +0000 [thread overview]
Message-ID: <20240405214040.101396-5-gnoack@google.com> (raw)
In-Reply-To: <20240405214040.101396-1-gnoack@google.com>
Because the LANDLOCK_ACCESS_FS_IOCTL_DEV right is associated with the
opened file during open(2), IOCTLs are supposed to 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 | 36 ++++++++++++++++------
1 file changed, 27 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
index 8a72e26d4977..70a05651619d 100644
--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c
@@ -3852,20 +3852,38 @@ static int test_fs_ioc_getflags_ioctl(int fd)
return 0;
}
-TEST(memfd_ftruncate)
+TEST(memfd_ftruncate_and_ioctl)
{
- int fd;
-
- fd = memfd_create("name", MFD_CLOEXEC);
- ASSERT_LE(0, fd);
+ const struct landlock_ruleset_attr attr = {
+ .handled_access_fs = ACCESS_ALL,
+ };
+ int ruleset_fd, fd, i;
/*
- * Checks that ftruncate is permitted on file descriptors that are
- * created in ways other than open(2).
+ * We exercise the same test both with and without Landlock enabled, to
+ * ensure that it behaves the same in both cases.
*/
- EXPECT_EQ(0, test_ftruncate(fd));
+ for (i = 0; i < 2; i++) {
+ /* Creates a new memfd. */
+ fd = memfd_create("name", MFD_CLOEXEC);
+ ASSERT_LE(0, fd);
- ASSERT_EQ(0, close(fd));
+ /*
+ * 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, test_fs_ioc_getflags_ioctl(fd));
+
+ ASSERT_EQ(0, close(fd));
+
+ /* Enables Landlock. */
+ ruleset_fd = landlock_create_ruleset(&attr, sizeof(attr), 0);
+ ASSERT_LE(0, ruleset_fd);
+ enforce_ruleset(_metadata, ruleset_fd);
+ ASSERT_EQ(0, close(ruleset_fd));
+ }
}
static int test_fionread_ioctl(int fd)
--
2.44.0.478.gd926399ef9-goog
next prev parent reply other threads:[~2024-04-05 21:41 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-05 21:40 [PATCH v14 00/12] Landlock: IOCTL support Günther Noack
2024-04-05 21:40 ` [PATCH v14 01/12] fs: Return ENOTTY directly if FS_IOC_GETUUID or FS_IOC_GETFSSYSFSPATH fail Günther Noack
2024-04-05 21:54 ` Kent Overstreet
2024-04-09 10:08 ` (subset) " Christian Brauner
2024-04-09 12:11 ` Mickaël Salaün
2024-04-12 15:17 ` Mickaël Salaün
2024-04-05 21:40 ` [PATCH v14 02/12] landlock: Add IOCTL access right for character and block devices Günther Noack
2024-04-12 15:16 ` Mickaël Salaün
2024-04-18 9:28 ` Günther Noack
2024-04-19 5:43 ` Mickaël Salaün
2024-04-05 21:40 ` [PATCH v14 03/12] selftests/landlock: Test IOCTL support Günther Noack
2024-04-12 15:17 ` Mickaël Salaün
2024-04-18 11:10 ` Günther Noack
2024-04-19 5:44 ` Mickaël Salaün
2024-04-19 14:06 ` Günther Noack
2024-04-05 21:40 ` Günther Noack [this message]
2024-04-05 21:40 ` [PATCH v14 05/12] selftests/landlock: Test ioctl(2) and ftruncate(2) with open(O_PATH) Günther Noack
2024-04-05 21:40 ` [PATCH v14 06/12] selftests/landlock: Test IOCTLs on named pipes Günther Noack
2024-04-05 21:40 ` [PATCH v14 07/12] selftests/landlock: Check IOCTL restrictions for named UNIX domain sockets Günther Noack
2024-04-12 15:17 ` Mickaël Salaün
2024-04-18 11:24 ` Günther Noack
2024-04-05 21:40 ` [PATCH v14 08/12] selftests/landlock: Exhaustive test for the IOCTL allow-list Günther Noack
2024-04-12 15:18 ` Mickaël Salaün
2024-04-18 12:21 ` Günther Noack
2024-04-19 5:44 ` Mickaël Salaün
2024-04-19 14:49 ` Günther Noack
2024-04-05 21:40 ` [PATCH v14 09/12] samples/landlock: Add support for LANDLOCK_ACCESS_FS_IOCTL_DEV Günther Noack
2024-04-05 21:40 ` [PATCH v14 10/12] landlock: Document IOCTL support Günther Noack
2024-04-05 21:40 ` [PATCH v14 11/12] MAINTAINERS: Notify Landlock maintainers about changes to fs/ioctl.c Günther Noack
2024-04-05 21:40 ` [PATCH v14 12/12] fs/ioctl: Add a comment to keep the logic in sync with LSM policies Günther Noack
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