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selftests/landlock: Add tests to check unhandled rule's access rights

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Add two tests to make sure that we cannot add a rule to a ruleset if the
rule's access rights that are not handled by the ruleset:
* fs: layout1.rule_with_unhandled_access
* net: mini.rule_with_unhandled_access

Cc: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Reviewed-by: Günther Noack <gnoack@google.com>
Link: https://lore.kernel.org/r/20231130093616.67340-3-mic@digikod.net
Signed-off-by: Mickaël Salaün <mic@digikod.net>
This commit is contained in:
Mickaël Salaün 2023-11-30 10:36:16 +01:00
parent 6471c9c4c4
commit e2780a0b95
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GPG key ID: E5E3D0E88C82F6D2
2 changed files with 66 additions and 0 deletions
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34
tools/testing/selftests/landlock/fs_test.c
View file

@ -632,6 +632,40 @@ TEST_F_FORK(layout0, rule_with_unknown_access)
ASSERT_EQ(0, close(ruleset_fd));
}
TEST_F_FORK(layout1, rule_with_unhandled_access)
{
struct landlock_ruleset_attr ruleset_attr = {
.handled_access_fs = LANDLOCK_ACCESS_FS_EXECUTE,
};
struct landlock_path_beneath_attr path_beneath = {};
int ruleset_fd;
__u64 access;
ruleset_fd =
landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
ASSERT_LE(0, ruleset_fd);
path_beneath.parent_fd = open(file1_s1d2, O_PATH | O_CLOEXEC);
ASSERT_LE(0, path_beneath.parent_fd);
for (access = 1; access > 0; access <<= 1) {
int err;
path_beneath.allowed_access = access;
err = landlock_add_rule(ruleset_fd, LANDLOCK_RULE_PATH_BENEATH,
&path_beneath, 0);
if (access == ruleset_attr.handled_access_fs) {
EXPECT_EQ(0, err);
} else {
EXPECT_EQ(-1, err);
EXPECT_EQ(EINVAL, errno);
}
}
EXPECT_EQ(0, close(path_beneath.parent_fd));
EXPECT_EQ(0, close(ruleset_fd));
}
static void add_path_beneath(struct __test_metadata *const _metadata,
const int ruleset_fd, const __u64 allowed_access,
const char *const path)

32
tools/testing/selftests/landlock/net_test.c
View file

@ -1301,6 +1301,38 @@ TEST_F(mini, rule_with_unknown_access)
EXPECT_EQ(0, close(ruleset_fd));
}
TEST_F(mini, rule_with_unhandled_access)
{
struct landlock_ruleset_attr ruleset_attr = {
.handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP,
};
struct landlock_net_port_attr net_port = {
.port = sock_port_start,
};
int ruleset_fd;
__u64 access;
ruleset_fd =
landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
ASSERT_LE(0, ruleset_fd);
for (access = 1; access > 0; access <<= 1) {
int err;
net_port.allowed_access = access;
err = landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT,
&net_port, 0);
if (access == ruleset_attr.handled_access_net) {
EXPECT_EQ(0, err);
} else {
EXPECT_EQ(-1, err);
EXPECT_EQ(EINVAL, errno);
}
}
EXPECT_EQ(0, close(ruleset_fd));
}
TEST_F(mini, inval)
{
const struct landlock_ruleset_attr ruleset_attr = {