diff mbox series

[v7,14/18] seltests/landlock: add rules overlapping test

Message ID 20220829170401.834298-15-konstantin.meskhidze@huawei.com (mailing list archive)
State Handled Elsewhere
Headers show
Series Network support for Landlock | expand

Commit Message

Konstantin Meskhidze (A) Aug. 29, 2022, 5:03 p.m. UTC 
This patch adds overlapping rules for one port. First rule adds just
bind() access right for a port. The second one adds both bind() and
connect() access rights for the same port.

Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
---

Changes since v6:
* None.

Changes since v5:
* Formats code with clang-format-14.

Changes since v4:
* Refactors code with self->port, self->addr4 variables.

Changes since v3:
* Adds ruleset_overlap test.

---
 tools/testing/selftests/landlock/net_test.c | 89 +++++++++++++++++++++
 1 file changed, 89 insertions(+)

--
2.25.1

Comments

Mickaël Salaün Sept. 6, 2022, 8:09 a.m. UTC | #1 
On 29/08/2022 19:03, Konstantin Meskhidze wrote:
> This patch adds overlapping rules for one port. First rule adds just
> bind() access right for a port. The second one adds both bind() and
> connect() access rights for the same port.
> 
> Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
> ---
> 
> Changes since v6:
> * None.
> 
> Changes since v5:
> * Formats code with clang-format-14.
> 
> Changes since v4:
> * Refactors code with self->port, self->addr4 variables.
> 
> Changes since v3:
> * Adds ruleset_overlap test.
> 
> ---
>   tools/testing/selftests/landlock/net_test.c | 89 +++++++++++++++++++++
>   1 file changed, 89 insertions(+)
> 
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index 40aef7c683af..b3b38745f4eb 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -464,4 +464,93 @@ TEST_F(socket, connect_afunspec_with_restictions)
>   	ASSERT_EQ(1, WIFEXITED(status));
>   	ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status));
>   }
> +
> +TEST_F(socket, ruleset_overlap)
> +{
> +	int sockfd;
> +	int one = 1;
> +
> +	struct landlock_ruleset_attr ruleset_attr = {
> +		.handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP |
> +				      LANDLOCK_ACCESS_NET_CONNECT_TCP,
> +	};
> +	struct landlock_net_service_attr net_service_1 = {
> +		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP,
> +
> +		.port = self->port[0],
> +	};
> +
> +	struct landlock_net_service_attr net_service_2 = {
> +		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP |
> +				  LANDLOCK_ACCESS_NET_CONNECT_TCP,
> +
> +		.port = self->port[0],
> +	};
> +
> +	int ruleset_fd =
> +		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
> +	ASSERT_LE(0, ruleset_fd);
> +
> +	/* Allows bind operations to the port[0] socket. */
> +	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
> +				       &net_service_1, 0));
> +	/* Allows connect and bind operations to the port[0] socket. */
> +	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
> +				       &net_service_2, 0));
> +
> +	/* Enforces the ruleset. */
> +	enforce_ruleset(_metadata, ruleset_fd);
> +
> +	/* Creates a server socket. */
> +	sockfd = create_socket_variant(variant, SOCK_STREAM);
> +	ASSERT_LE(0, sockfd);
> +	/* Allows to reuse of local address. */
> +	ASSERT_EQ(0, setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &one,
> +				sizeof(one)));
> +
> +	/* Binds the socket to address with port[0]. */
> +	ASSERT_EQ(0, bind_variant(variant, sockfd, self, 0));
> +
> +	/* Makes connection to socket with port[0]. */
> +	ASSERT_EQ(0, connect_variant(variant, sockfd, self, 0));
> +
> +	/* Closes socket. */
> +	ASSERT_EQ(0, close(sockfd));
> +
> +	/* Creates another ruleset layer. */
> +	ruleset_fd =
> +		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
> +	ASSERT_LE(0, ruleset_fd);
> +
> +	/*
> +	 * Allows bind operations to the port[0] socket in
> +	 * the new ruleset layer.
> +	 */
> +	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
> +				       &net_service_1, 0));
> +
> +	/* Enforces the new ruleset. */
> +	enforce_ruleset(_metadata, ruleset_fd);
> +
> +	/* Creates a server socket. */
> +	sockfd = create_socket_variant(variant, SOCK_STREAM);
> +	ASSERT_LE(0, sockfd);
> +	/* Allows to reuse of local address. */
> +	ASSERT_EQ(0, setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &one,
> +				sizeof(one)));
> +
> +	/* Binds the socket to address with port[0]. */
> +	ASSERT_EQ(0, bind_variant(variant, sockfd, self, 0));
> +
> +	/*
> +	 * Forbids to connect the socket to address with port[0],
> +	 * cause just one ruleset layer has connect() access rule.

s/cause/because/ (everywhere)
Konstantin Meskhidze (A) Sept. 10, 2022, 8:49 p.m. UTC | #2 
9/6/2022 11:09 AM, Mickaël Salaün пишет:
> 
> On 29/08/2022 19:03, Konstantin Meskhidze wrote:
>> This patch adds overlapping rules for one port. First rule adds just
>> bind() access right for a port. The second one adds both bind() and
>> connect() access rights for the same port.
>> 
>> Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
>> ---
>> 
>> Changes since v6:
>> * None.
>> 
>> Changes since v5:
>> * Formats code with clang-format-14.
>> 
>> Changes since v4:
>> * Refactors code with self->port, self->addr4 variables.
>> 
>> Changes since v3:
>> * Adds ruleset_overlap test.
>> 
>> ---
>>   tools/testing/selftests/landlock/net_test.c | 89 +++++++++++++++++++++
>>   1 file changed, 89 insertions(+)
>> 
>> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
>> index 40aef7c683af..b3b38745f4eb 100644
>> --- a/tools/testing/selftests/landlock/net_test.c
>> +++ b/tools/testing/selftests/landlock/net_test.c
>> @@ -464,4 +464,93 @@ TEST_F(socket, connect_afunspec_with_restictions)
>>   	ASSERT_EQ(1, WIFEXITED(status));
>>   	ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status));
>>   }
>> +
>> +TEST_F(socket, ruleset_overlap)
>> +{
>> +	int sockfd;
>> +	int one = 1;
>> +
>> +	struct landlock_ruleset_attr ruleset_attr = {
>> +		.handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP |
>> +				      LANDLOCK_ACCESS_NET_CONNECT_TCP,
>> +	};
>> +	struct landlock_net_service_attr net_service_1 = {
>> +		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP,
>> +
>> +		.port = self->port[0],
>> +	};
>> +
>> +	struct landlock_net_service_attr net_service_2 = {
>> +		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP |
>> +				  LANDLOCK_ACCESS_NET_CONNECT_TCP,
>> +
>> +		.port = self->port[0],
>> +	};
>> +
>> +	int ruleset_fd =
>> +		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
>> +	ASSERT_LE(0, ruleset_fd);
>> +
>> +	/* Allows bind operations to the port[0] socket. */
>> +	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
>> +				       &net_service_1, 0));
>> +	/* Allows connect and bind operations to the port[0] socket. */
>> +	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
>> +				       &net_service_2, 0));
>> +
>> +	/* Enforces the ruleset. */
>> +	enforce_ruleset(_metadata, ruleset_fd);
>> +
>> +	/* Creates a server socket. */
>> +	sockfd = create_socket_variant(variant, SOCK_STREAM);
>> +	ASSERT_LE(0, sockfd);
>> +	/* Allows to reuse of local address. */
>> +	ASSERT_EQ(0, setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &one,
>> +				sizeof(one)));
>> +
>> +	/* Binds the socket to address with port[0]. */
>> +	ASSERT_EQ(0, bind_variant(variant, sockfd, self, 0));
>> +
>> +	/* Makes connection to socket with port[0]. */
>> +	ASSERT_EQ(0, connect_variant(variant, sockfd, self, 0));
>> +
>> +	/* Closes socket. */
>> +	ASSERT_EQ(0, close(sockfd));
>> +
>> +	/* Creates another ruleset layer. */
>> +	ruleset_fd =
>> +		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
>> +	ASSERT_LE(0, ruleset_fd);
>> +
>> +	/*
>> +	 * Allows bind operations to the port[0] socket in
>> +	 * the new ruleset layer.
>> +	 */
>> +	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
>> +				       &net_service_1, 0));
>> +
>> +	/* Enforces the new ruleset. */
>> +	enforce_ruleset(_metadata, ruleset_fd);
>> +
>> +	/* Creates a server socket. */
>> +	sockfd = create_socket_variant(variant, SOCK_STREAM);
>> +	ASSERT_LE(0, sockfd);
>> +	/* Allows to reuse of local address. */
>> +	ASSERT_EQ(0, setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &one,
>> +				sizeof(one)));
>> +
>> +	/* Binds the socket to address with port[0]. */
>> +	ASSERT_EQ(0, bind_variant(variant, sockfd, self, 0));
>> +
>> +	/*
>> +	 * Forbids to connect the socket to address with port[0],
>> +	 * cause just one ruleset layer has connect() access rule.
> 
> s/cause/because/ (everywhere)

   Ok. I will rewrite it.
> .
diff mbox series

Patch

diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
index 40aef7c683af..b3b38745f4eb 100644
--- a/tools/testing/selftests/landlock/net_test.c
+++ b/tools/testing/selftests/landlock/net_test.c
@@ -464,4 +464,93 @@  TEST_F(socket, connect_afunspec_with_restictions)
 	ASSERT_EQ(1, WIFEXITED(status));
 	ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status));
 }
+
+TEST_F(socket, ruleset_overlap)
+{
+	int sockfd;
+	int one = 1;
+
+	struct landlock_ruleset_attr ruleset_attr = {
+		.handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP |
+				      LANDLOCK_ACCESS_NET_CONNECT_TCP,
+	};
+	struct landlock_net_service_attr net_service_1 = {
+		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP,
+
+		.port = self->port[0],
+	};
+
+	struct landlock_net_service_attr net_service_2 = {
+		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP |
+				  LANDLOCK_ACCESS_NET_CONNECT_TCP,
+
+		.port = self->port[0],
+	};
+
+	int ruleset_fd =
+		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
+	ASSERT_LE(0, ruleset_fd);
+
+	/* Allows bind operations to the port[0] socket. */
+	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
+				       &net_service_1, 0));
+	/* Allows connect and bind operations to the port[0] socket. */
+	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
+				       &net_service_2, 0));
+
+	/* Enforces the ruleset. */
+	enforce_ruleset(_metadata, ruleset_fd);
+
+	/* Creates a server socket. */
+	sockfd = create_socket_variant(variant, SOCK_STREAM);
+	ASSERT_LE(0, sockfd);
+	/* Allows to reuse of local address. */
+	ASSERT_EQ(0, setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &one,
+				sizeof(one)));
+
+	/* Binds the socket to address with port[0]. */
+	ASSERT_EQ(0, bind_variant(variant, sockfd, self, 0));
+
+	/* Makes connection to socket with port[0]. */
+	ASSERT_EQ(0, connect_variant(variant, sockfd, self, 0));
+
+	/* Closes socket. */
+	ASSERT_EQ(0, close(sockfd));
+
+	/* Creates another ruleset layer. */
+	ruleset_fd =
+		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
+	ASSERT_LE(0, ruleset_fd);
+
+	/*
+	 * Allows bind operations to the port[0] socket in
+	 * the new ruleset layer.
+	 */
+	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
+				       &net_service_1, 0));
+
+	/* Enforces the new ruleset. */
+	enforce_ruleset(_metadata, ruleset_fd);
+
+	/* Creates a server socket. */
+	sockfd = create_socket_variant(variant, SOCK_STREAM);
+	ASSERT_LE(0, sockfd);
+	/* Allows to reuse of local address. */
+	ASSERT_EQ(0, setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &one,
+				sizeof(one)));
+
+	/* Binds the socket to address with port[0]. */
+	ASSERT_EQ(0, bind_variant(variant, sockfd, self, 0));
+
+	/*
+	 * Forbids to connect the socket to address with port[0],
+	 * cause just one ruleset layer has connect() access rule.
+	 */
+	ASSERT_EQ(-1, connect_variant(variant, sockfd, self, 0));
+	ASSERT_EQ(EACCES, errno);
+
+	/* Closes socket. */
+	ASSERT_EQ(0, close(sockfd));
+}
+
 TEST_HARNESS_MAIN