linux-kernel - [PATCH 5.17 681/772] selftests/landlock: Add tests for O

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Date:   Tue,  7 Jun 2022 19:04:33 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Shuah Khan <shuah@...nel.org>,
        Mickaël Salaün <mic@...ikod.net>
Subject: [PATCH 5.17 681/772] selftests/landlock: Add tests for O_PATH

From: Mickaël Salaün <mic@...ikod.net>

commit d1788ad990874734341b05ab8ccb6448c09c6422 upstream.

The O_PATH flag is currently not handled by Landlock.  Let's make sure
this behavior will remain consistent with the same ruleset over time.

Cc: Shuah Khan <shuah@...nel.org>
Link: https://lore.kernel.org/r/20220506160820.524344-8-mic@digikod.net
Cc: stable@...r.kernel.org
Signed-off-by: Mickaël Salaün <mic@...ikod.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 tools/testing/selftests/landlock/fs_test.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c
@@ -654,17 +654,23 @@ TEST_F_FORK(layout1, effective_access)
 	enforce_ruleset(_metadata, ruleset_fd);
 	ASSERT_EQ(0, close(ruleset_fd));
 
-	/* Tests on a directory. */
+	/* Tests on a directory (with or without O_PATH). */
 	ASSERT_EQ(EACCES, test_open("/", O_RDONLY));
+	ASSERT_EQ(0, test_open("/", O_RDONLY | O_PATH));
 	ASSERT_EQ(EACCES, test_open(dir_s1d1, O_RDONLY));
+	ASSERT_EQ(0, test_open(dir_s1d1, O_RDONLY | O_PATH));
 	ASSERT_EQ(EACCES, test_open(file1_s1d1, O_RDONLY));
+	ASSERT_EQ(0, test_open(file1_s1d1, O_RDONLY | O_PATH));
+
 	ASSERT_EQ(0, test_open(dir_s1d2, O_RDONLY));
 	ASSERT_EQ(0, test_open(file1_s1d2, O_RDONLY));
 	ASSERT_EQ(0, test_open(dir_s1d3, O_RDONLY));
 	ASSERT_EQ(0, test_open(file1_s1d3, O_RDONLY));
 
-	/* Tests on a file. */
+	/* Tests on a file (with or without O_PATH). */
 	ASSERT_EQ(EACCES, test_open(dir_s2d2, O_RDONLY));
+	ASSERT_EQ(0, test_open(dir_s2d2, O_RDONLY | O_PATH));
+
 	ASSERT_EQ(0, test_open(file1_s2d2, O_RDONLY));
 
 	/* Checks effective read and write actions. */