diff options
Diffstat (limited to 'tools/testing/selftests/landlock')
| -rw-r--r-- | tools/testing/selftests/landlock/Makefile | 4 | ||||
| -rw-r--r-- | tools/testing/selftests/landlock/base_test.c | 46 | ||||
| -rw-r--r-- | tools/testing/selftests/landlock/common.h | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/landlock/config | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/landlock/fs_test.c | 3 | ||||
| -rw-r--r-- | tools/testing/selftests/landlock/net_test.c | 124 | ||||
| -rw-r--r-- | tools/testing/selftests/landlock/scoped_signal_test.c | 108 |
7 files changed, 255 insertions, 34 deletions
diff --git a/tools/testing/selftests/landlock/Makefile b/tools/testing/selftests/landlock/Makefile index 348e2dbdb4e0..480f13e77fcc 100644 --- a/tools/testing/selftests/landlock/Makefile +++ b/tools/testing/selftests/landlock/Makefile @@ -13,11 +13,11 @@ TEST_GEN_PROGS := $(src_test:.c=) TEST_GEN_PROGS_EXTENDED := true # Short targets: -$(TEST_GEN_PROGS): LDLIBS += -lcap +$(TEST_GEN_PROGS): LDLIBS += -lcap -lpthread $(TEST_GEN_PROGS_EXTENDED): LDFLAGS += -static include ../lib.mk # Targets with $(OUTPUT)/ prefix: -$(TEST_GEN_PROGS): LDLIBS += -lcap +$(TEST_GEN_PROGS): LDLIBS += -lcap -lpthread $(TEST_GEN_PROGS_EXTENDED): LDFLAGS += -static diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c index 1bc16fde2e8a..4766f8fec9f6 100644 --- a/tools/testing/selftests/landlock/base_test.c +++ b/tools/testing/selftests/landlock/base_test.c @@ -98,10 +98,54 @@ TEST(abi_version) ASSERT_EQ(EINVAL, errno); } +/* + * Old source trees might not have the set of Kselftest fixes related to kernel + * UAPI headers. + */ +#ifndef LANDLOCK_CREATE_RULESET_ERRATA +#define LANDLOCK_CREATE_RULESET_ERRATA (1U << 1) +#endif + +TEST(errata) +{ + const struct landlock_ruleset_attr ruleset_attr = { + .handled_access_fs = LANDLOCK_ACCESS_FS_READ_FILE, + }; + int errata; + + errata = landlock_create_ruleset(NULL, 0, + LANDLOCK_CREATE_RULESET_ERRATA); + /* The errata bitmask will not be backported to tests. */ + ASSERT_LE(0, errata); + TH_LOG("errata: 0x%x", errata); + + ASSERT_EQ(-1, landlock_create_ruleset(&ruleset_attr, 0, + LANDLOCK_CREATE_RULESET_ERRATA)); + ASSERT_EQ(EINVAL, errno); + + ASSERT_EQ(-1, landlock_create_ruleset(NULL, sizeof(ruleset_attr), + LANDLOCK_CREATE_RULESET_ERRATA)); + ASSERT_EQ(EINVAL, errno); + + ASSERT_EQ(-1, + landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), + LANDLOCK_CREATE_RULESET_ERRATA)); + ASSERT_EQ(EINVAL, errno); + + ASSERT_EQ(-1, landlock_create_ruleset( + NULL, 0, + LANDLOCK_CREATE_RULESET_VERSION | + LANDLOCK_CREATE_RULESET_ERRATA)); + ASSERT_EQ(-1, landlock_create_ruleset(NULL, 0, + LANDLOCK_CREATE_RULESET_ERRATA | + 1 << 31)); + ASSERT_EQ(EINVAL, errno); +} + /* Tests ordering of syscall argument checks. */ TEST(create_ruleset_checks_ordering) { - const int last_flag = LANDLOCK_CREATE_RULESET_VERSION; + const int last_flag = LANDLOCK_CREATE_RULESET_ERRATA; const int invalid_flag = last_flag << 1; int ruleset_fd; const struct landlock_ruleset_attr ruleset_attr = { diff --git a/tools/testing/selftests/landlock/common.h b/tools/testing/selftests/landlock/common.h index 61056fa074bb..60afc1ce11bc 100644 --- a/tools/testing/selftests/landlock/common.h +++ b/tools/testing/selftests/landlock/common.h @@ -68,6 +68,7 @@ static void _init_caps(struct __test_metadata *const _metadata, bool drop_all) CAP_MKNOD, CAP_NET_ADMIN, CAP_NET_BIND_SERVICE, + CAP_SETUID, CAP_SYS_ADMIN, CAP_SYS_CHROOT, /* clang-format on */ @@ -234,6 +235,7 @@ enforce_ruleset(struct __test_metadata *const _metadata, const int ruleset_fd) struct protocol_variant { int domain; int type; + int protocol; }; struct service_fixture { diff --git a/tools/testing/selftests/landlock/config b/tools/testing/selftests/landlock/config index 29af19c4e9f9..a8982da4acbd 100644 --- a/tools/testing/selftests/landlock/config +++ b/tools/testing/selftests/landlock/config @@ -3,6 +3,8 @@ CONFIG_CGROUP_SCHED=y CONFIG_INET=y CONFIG_IPV6=y CONFIG_KEYS=y +CONFIG_MPTCP=y +CONFIG_MPTCP_IPV6=y CONFIG_NET=y CONFIG_NET_NS=y CONFIG_OVERLAY_FS=y diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c index 6788762188fe..97d360eae4f6 100644 --- a/tools/testing/selftests/landlock/fs_test.c +++ b/tools/testing/selftests/landlock/fs_test.c @@ -2003,8 +2003,7 @@ static void test_execute(struct __test_metadata *const _metadata, const int err, ASSERT_EQ(1, WIFEXITED(status)); ASSERT_EQ(err ? 2 : 0, WEXITSTATUS(status)) { - TH_LOG("Unexpected return code for \"%s\": %s", path, - strerror(errno)); + TH_LOG("Unexpected return code for \"%s\"", path); }; } diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c index 4e0aeb53b225..376079d70d3f 100644 --- a/tools/testing/selftests/landlock/net_test.c +++ b/tools/testing/selftests/landlock/net_test.c @@ -85,18 +85,18 @@ static void setup_loopback(struct __test_metadata *const _metadata) clear_ambient_cap(_metadata, CAP_NET_ADMIN); } +static bool prot_is_tcp(const struct protocol_variant *const prot) +{ + return (prot->domain == AF_INET || prot->domain == AF_INET6) && + prot->type == SOCK_STREAM && + (prot->protocol == IPPROTO_TCP || prot->protocol == IPPROTO_IP); +} + static bool is_restricted(const struct protocol_variant *const prot, const enum sandbox_type sandbox) { - switch (prot->domain) { - case AF_INET: - case AF_INET6: - switch (prot->type) { - case SOCK_STREAM: - return sandbox == TCP_SANDBOX; - } - break; - } + if (sandbox == TCP_SANDBOX) + return prot_is_tcp(prot); return false; } @@ -105,7 +105,7 @@ static int socket_variant(const struct service_fixture *const srv) int ret; ret = socket(srv->protocol.domain, srv->protocol.type | SOCK_CLOEXEC, - 0); + srv->protocol.protocol); if (ret < 0) return -errno; return ret; @@ -290,22 +290,59 @@ FIXTURE_TEARDOWN(protocol) } /* clang-format off */ -FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_tcp) { +FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_tcp1) { /* clang-format on */ .sandbox = NO_SANDBOX, .prot = { .domain = AF_INET, .type = SOCK_STREAM, + /* IPPROTO_IP == 0 */ + .protocol = IPPROTO_IP, }, }; /* clang-format off */ -FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_tcp) { +FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_tcp2) { + /* clang-format on */ + .sandbox = NO_SANDBOX, + .prot = { + .domain = AF_INET, + .type = SOCK_STREAM, + .protocol = IPPROTO_TCP, + }, +}; + +/* clang-format off */ +FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_tcp1) { /* clang-format on */ .sandbox = NO_SANDBOX, .prot = { .domain = AF_INET6, .type = SOCK_STREAM, + /* IPPROTO_IP == 0 */ + .protocol = IPPROTO_IP, + }, +}; + +/* clang-format off */ +FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_tcp2) { + /* clang-format on */ + .sandbox = NO_SANDBOX, + .prot = { + .domain = AF_INET6, + .type = SOCK_STREAM, + .protocol = IPPROTO_TCP, + }, +}; + +/* clang-format off */ +FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_mptcp) { + /* clang-format on */ + .sandbox = NO_SANDBOX, + .prot = { + .domain = AF_INET, + .type = SOCK_STREAM, + .protocol = IPPROTO_MPTCP, }, }; @@ -330,6 +367,17 @@ FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_udp) { }; /* clang-format off */ +FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_mptcp) { + /* clang-format on */ + .sandbox = NO_SANDBOX, + .prot = { + .domain = AF_INET6, + .type = SOCK_STREAM, + .protocol = IPPROTO_MPTCP, + }, +}; + +/* clang-format off */ FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_unix_stream) { /* clang-format on */ .sandbox = NO_SANDBOX, @@ -350,22 +398,48 @@ FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_unix_datagram) { }; /* clang-format off */ -FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_tcp) { +FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_tcp1) { + /* clang-format on */ + .sandbox = TCP_SANDBOX, + .prot = { + .domain = AF_INET, + .type = SOCK_STREAM, + /* IPPROTO_IP == 0 */ + .protocol = IPPROTO_IP, + }, +}; + +/* clang-format off */ +FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_tcp2) { /* clang-format on */ .sandbox = TCP_SANDBOX, .prot = { .domain = AF_INET, .type = SOCK_STREAM, + .protocol = IPPROTO_TCP, + }, +}; + +/* clang-format off */ +FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_tcp1) { + /* clang-format on */ + .sandbox = TCP_SANDBOX, + .prot = { + .domain = AF_INET6, + .type = SOCK_STREAM, + /* IPPROTO_IP == 0 */ + .protocol = IPPROTO_IP, }, }; /* clang-format off */ -FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_tcp) { +FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_tcp2) { /* clang-format on */ .sandbox = TCP_SANDBOX, .prot = { .domain = AF_INET6, .type = SOCK_STREAM, + .protocol = IPPROTO_TCP, }, }; @@ -390,6 +464,17 @@ FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_udp) { }; /* clang-format off */ +FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_mptcp) { + /* clang-format on */ + .sandbox = TCP_SANDBOX, + .prot = { + .domain = AF_INET, + .type = SOCK_STREAM, + .protocol = IPPROTO_MPTCP, + }, +}; + +/* clang-format off */ FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_unix_stream) { /* clang-format on */ .sandbox = TCP_SANDBOX, @@ -400,6 +485,17 @@ FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_unix_stream) { }; /* clang-format off */ +FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_mptcp) { + /* clang-format on */ + .sandbox = TCP_SANDBOX, + .prot = { + .domain = AF_INET6, + .type = SOCK_STREAM, + .protocol = IPPROTO_MPTCP, + }, +}; + +/* clang-format off */ FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_unix_datagram) { /* clang-format on */ .sandbox = TCP_SANDBOX, diff --git a/tools/testing/selftests/landlock/scoped_signal_test.c b/tools/testing/selftests/landlock/scoped_signal_test.c index 475ee62a832d..d8bf33417619 100644 --- a/tools/testing/selftests/landlock/scoped_signal_test.c +++ b/tools/testing/selftests/landlock/scoped_signal_test.c @@ -249,47 +249,67 @@ TEST_F(scoped_domains, check_access_signal) _metadata->exit_code = KSFT_FAIL; } -static int thread_pipe[2]; - enum thread_return { THREAD_INVALID = 0, THREAD_SUCCESS = 1, THREAD_ERROR = 2, + THREAD_TEST_FAILED = 3, }; -void *thread_func(void *arg) +static void *thread_sync(void *arg) { + const int pipe_read = *(int *)arg; char buf; - if (read(thread_pipe[0], &buf, 1) != 1) + if (read(pipe_read, &buf, 1) != 1) return (void *)THREAD_ERROR; return (void *)THREAD_SUCCESS; } -TEST(signal_scoping_threads) +TEST(signal_scoping_thread_before) { - pthread_t no_sandbox_thread, scoped_thread; + pthread_t no_sandbox_thread; enum thread_return ret = THREAD_INVALID; + int thread_pipe[2]; drop_caps(_metadata); ASSERT_EQ(0, pipe2(thread_pipe, O_CLOEXEC)); - ASSERT_EQ(0, - pthread_create(&no_sandbox_thread, NULL, thread_func, NULL)); + ASSERT_EQ(0, pthread_create(&no_sandbox_thread, NULL, thread_sync, + &thread_pipe[0])); - /* Restricts the domain after creating the first thread. */ + /* Enforces restriction after creating the thread. */ create_scoped_domain(_metadata, LANDLOCK_SCOPE_SIGNAL); - ASSERT_EQ(EPERM, pthread_kill(no_sandbox_thread, 0)); - ASSERT_EQ(1, write(thread_pipe[1], ".", 1)); - - ASSERT_EQ(0, pthread_create(&scoped_thread, NULL, thread_func, NULL)); - ASSERT_EQ(0, pthread_kill(scoped_thread, 0)); - ASSERT_EQ(1, write(thread_pipe[1], ".", 1)); + EXPECT_EQ(0, pthread_kill(no_sandbox_thread, 0)); + EXPECT_EQ(1, write(thread_pipe[1], ".", 1)); EXPECT_EQ(0, pthread_join(no_sandbox_thread, (void **)&ret)); EXPECT_EQ(THREAD_SUCCESS, ret); + + EXPECT_EQ(0, close(thread_pipe[0])); + EXPECT_EQ(0, close(thread_pipe[1])); +} + +TEST(signal_scoping_thread_after) +{ + pthread_t scoped_thread; + enum thread_return ret = THREAD_INVALID; + int thread_pipe[2]; + + drop_caps(_metadata); + ASSERT_EQ(0, pipe2(thread_pipe, O_CLOEXEC)); + + /* Enforces restriction before creating the thread. */ + create_scoped_domain(_metadata, LANDLOCK_SCOPE_SIGNAL); + + ASSERT_EQ(0, pthread_create(&scoped_thread, NULL, thread_sync, + &thread_pipe[0])); + + EXPECT_EQ(0, pthread_kill(scoped_thread, 0)); + EXPECT_EQ(1, write(thread_pipe[1], ".", 1)); + EXPECT_EQ(0, pthread_join(scoped_thread, (void **)&ret)); EXPECT_EQ(THREAD_SUCCESS, ret); @@ -297,6 +317,64 @@ TEST(signal_scoping_threads) EXPECT_EQ(0, close(thread_pipe[1])); } +struct thread_setuid_args { + int pipe_read, new_uid; +}; + +void *thread_setuid(void *ptr) +{ + const struct thread_setuid_args *arg = ptr; + char buf; + + if (read(arg->pipe_read, &buf, 1) != 1) + return (void *)THREAD_ERROR; + + /* libc's setuid() should update all thread's credentials. */ + if (getuid() != arg->new_uid) + return (void *)THREAD_TEST_FAILED; + + return (void *)THREAD_SUCCESS; +} + +TEST(signal_scoping_thread_setuid) +{ + struct thread_setuid_args arg; + pthread_t no_sandbox_thread; + enum thread_return ret = THREAD_INVALID; + int pipe_parent[2]; + int prev_uid; + + disable_caps(_metadata); + + /* This test does not need to be run as root. */ + prev_uid = getuid(); + arg.new_uid = prev_uid + 1; + EXPECT_LT(0, arg.new_uid); + + ASSERT_EQ(0, pipe2(pipe_parent, O_CLOEXEC)); + arg.pipe_read = pipe_parent[0]; + + /* Capabilities must be set before creating a new thread. */ + set_cap(_metadata, CAP_SETUID); + ASSERT_EQ(0, pthread_create(&no_sandbox_thread, NULL, thread_setuid, + &arg)); + + /* Enforces restriction after creating the thread. */ + create_scoped_domain(_metadata, LANDLOCK_SCOPE_SIGNAL); + + EXPECT_NE(arg.new_uid, getuid()); + EXPECT_EQ(0, setuid(arg.new_uid)); + EXPECT_EQ(arg.new_uid, getuid()); + EXPECT_EQ(1, write(pipe_parent[1], ".", 1)); + + EXPECT_EQ(0, pthread_join(no_sandbox_thread, (void **)&ret)); + EXPECT_EQ(THREAD_SUCCESS, ret); + + clear_cap(_metadata, CAP_SETUID); + EXPECT_EQ(0, close(pipe_parent[0])); + EXPECT_EQ(0, close(pipe_parent[1])); +} + const short backlog = 10; static volatile sig_atomic_t signal_received; |