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selftests/landlock: Extend tests for landlock_restrict_self(2)'s flags

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Add the base_test's restrict_self_fd_flags tests to align with previous
restrict_self_fd tests but with the new
LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF flag.

Add the restrict_self_flags tests to check that
LANDLOCK_RESTRICT_SELF_LOG_SAME_EXEC_OFF,
LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON, and
LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF are valid but not the next
bit.  Some checks are similar to restrict_self_checks_ordering's ones.

Cc: Günther Noack <gnoack@google.com>
Cc: Paul Moore <paul@paul-moore.com>
Link: https://lore.kernel.org/r/20250320190717.2287696-22-mic@digikod.net
Signed-off-by: Mickaël Salaün <mic@digikod.net>
This commit is contained in:
Mickaël Salaün
2025-03-20 20:07:10 +01:00
parent ec12a8d4c1
commit e178b404ea
1 changed files with 71 additions and 0 deletions
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71
tools/testing/selftests/landlock/base_test.c
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@@ -288,6 +288,77 @@ TEST(restrict_self_fd)
EXPECT_EQ(EBADFD, errno);
}
TEST(restrict_self_fd_flags)
{
int fd;
fd = open("/dev/null", O_RDONLY | O_CLOEXEC);
ASSERT_LE(0, fd);
/*
* LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF accepts -1 but not any file
* descriptor.
*/
EXPECT_EQ(-1, landlock_restrict_self(
fd, LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF));
EXPECT_EQ(EBADFD, errno);
}
TEST(restrict_self_flags)
{
const __u32 last_flag = LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF;
/* Tests invalid flag combinations. */
EXPECT_EQ(-1, landlock_restrict_self(-1, last_flag << 1));
EXPECT_EQ(EINVAL, errno);
EXPECT_EQ(-1, landlock_restrict_self(-1, -1));
EXPECT_EQ(EINVAL, errno);
/* Tests valid flag combinations. */
EXPECT_EQ(-1, landlock_restrict_self(-1, 0));
EXPECT_EQ(EBADF, errno);
EXPECT_EQ(-1, landlock_restrict_self(
-1, LANDLOCK_RESTRICT_SELF_LOG_SAME_EXEC_OFF));
EXPECT_EQ(EBADF, errno);
EXPECT_EQ(-1,
landlock_restrict_self(
-1,
LANDLOCK_RESTRICT_SELF_LOG_SAME_EXEC_OFF |
LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF));
EXPECT_EQ(EBADF, errno);
EXPECT_EQ(-1,
landlock_restrict_self(
-1,
LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON |
LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF));
EXPECT_EQ(EBADF, errno);
EXPECT_EQ(-1, landlock_restrict_self(
-1, LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON));
EXPECT_EQ(EBADF, errno);
EXPECT_EQ(-1,
landlock_restrict_self(
-1, LANDLOCK_RESTRICT_SELF_LOG_SAME_EXEC_OFF |
LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON));
EXPECT_EQ(EBADF, errno);
/* Tests with an invalid ruleset_fd. */
EXPECT_EQ(-1, landlock_restrict_self(
-2, LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF));
EXPECT_EQ(EBADF, errno);
EXPECT_EQ(0, landlock_restrict_self(
-1, LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF));
}
TEST(ruleset_fd_io)
{
struct landlock_ruleset_attr ruleset_attr = {