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a549d055 KM |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * Landlock tests - Network | |
4 | * | |
5 | * Copyright © 2022-2023 Huawei Tech. Co., Ltd. | |
6 | * Copyright © 2023 Microsoft Corporation | |
7 | */ | |
8 | ||
9 | #define _GNU_SOURCE | |
10 | #include <arpa/inet.h> | |
11 | #include <errno.h> | |
12 | #include <fcntl.h> | |
13 | #include <linux/landlock.h> | |
14 | #include <linux/in.h> | |
15 | #include <sched.h> | |
16 | #include <stdint.h> | |
17 | #include <string.h> | |
18 | #include <sys/prctl.h> | |
19 | #include <sys/socket.h> | |
116099ed | 20 | #include <sys/syscall.h> |
a549d055 KM |
21 | #include <sys/un.h> |
22 | ||
23 | #include "common.h" | |
24 | ||
25 | const short sock_port_start = (1 << 10); | |
26 | ||
27 | static const char loopback_ipv4[] = "127.0.0.1"; | |
28 | static const char loopback_ipv6[] = "::1"; | |
29 | ||
30 | /* Number pending connections queue to be hold. */ | |
31 | const short backlog = 10; | |
32 | ||
33 | enum sandbox_type { | |
34 | NO_SANDBOX, | |
35 | /* This may be used to test rules that allow *and* deny accesses. */ | |
36 | TCP_SANDBOX, | |
37 | }; | |
38 | ||
39 | struct protocol_variant { | |
40 | int domain; | |
41 | int type; | |
42 | }; | |
43 | ||
44 | struct service_fixture { | |
45 | struct protocol_variant protocol; | |
46 | /* port is also stored in ipv4_addr.sin_port or ipv6_addr.sin6_port */ | |
47 | unsigned short port; | |
48 | union { | |
49 | struct sockaddr_in ipv4_addr; | |
50 | struct sockaddr_in6 ipv6_addr; | |
51 | struct { | |
52 | struct sockaddr_un unix_addr; | |
53 | socklen_t unix_addr_len; | |
54 | }; | |
55 | }; | |
56 | }; | |
57 | ||
116099ed HY |
58 | static pid_t sys_gettid(void) |
59 | { | |
60 | return syscall(__NR_gettid); | |
61 | } | |
62 | ||
a549d055 KM |
63 | static int set_service(struct service_fixture *const srv, |
64 | const struct protocol_variant prot, | |
65 | const unsigned short index) | |
66 | { | |
67 | memset(srv, 0, sizeof(*srv)); | |
68 | ||
69 | /* | |
70 | * Copies all protocol properties in case of the variant only contains | |
71 | * a subset of them. | |
72 | */ | |
73 | srv->protocol = prot; | |
74 | ||
75 | /* Checks for port overflow. */ | |
76 | if (index > 2) | |
77 | return 1; | |
78 | srv->port = sock_port_start << (2 * index); | |
79 | ||
80 | switch (prot.domain) { | |
81 | case AF_UNSPEC: | |
82 | case AF_INET: | |
83 | srv->ipv4_addr.sin_family = prot.domain; | |
84 | srv->ipv4_addr.sin_port = htons(srv->port); | |
85 | srv->ipv4_addr.sin_addr.s_addr = inet_addr(loopback_ipv4); | |
86 | return 0; | |
87 | ||
88 | case AF_INET6: | |
89 | srv->ipv6_addr.sin6_family = prot.domain; | |
90 | srv->ipv6_addr.sin6_port = htons(srv->port); | |
91 | inet_pton(AF_INET6, loopback_ipv6, &srv->ipv6_addr.sin6_addr); | |
92 | return 0; | |
93 | ||
94 | case AF_UNIX: | |
95 | srv->unix_addr.sun_family = prot.domain; | |
96 | sprintf(srv->unix_addr.sun_path, | |
116099ed | 97 | "_selftests-landlock-net-tid%d-index%d", sys_gettid(), |
a549d055 KM |
98 | index); |
99 | srv->unix_addr_len = SUN_LEN(&srv->unix_addr); | |
100 | srv->unix_addr.sun_path[0] = '\0'; | |
101 | return 0; | |
102 | } | |
103 | return 1; | |
104 | } | |
105 | ||
106 | static void setup_loopback(struct __test_metadata *const _metadata) | |
107 | { | |
108 | set_cap(_metadata, CAP_SYS_ADMIN); | |
109 | ASSERT_EQ(0, unshare(CLONE_NEWNET)); | |
a549d055 | 110 | clear_cap(_metadata, CAP_SYS_ADMIN); |
bb6f4dbe MS |
111 | |
112 | set_ambient_cap(_metadata, CAP_NET_ADMIN); | |
113 | ASSERT_EQ(0, system("ip link set dev lo up")); | |
114 | clear_ambient_cap(_metadata, CAP_NET_ADMIN); | |
a549d055 KM |
115 | } |
116 | ||
117 | static bool is_restricted(const struct protocol_variant *const prot, | |
118 | const enum sandbox_type sandbox) | |
119 | { | |
120 | switch (prot->domain) { | |
121 | case AF_INET: | |
122 | case AF_INET6: | |
123 | switch (prot->type) { | |
124 | case SOCK_STREAM: | |
125 | return sandbox == TCP_SANDBOX; | |
126 | } | |
127 | break; | |
128 | } | |
129 | return false; | |
130 | } | |
131 | ||
132 | static int socket_variant(const struct service_fixture *const srv) | |
133 | { | |
134 | int ret; | |
135 | ||
136 | ret = socket(srv->protocol.domain, srv->protocol.type | SOCK_CLOEXEC, | |
137 | 0); | |
138 | if (ret < 0) | |
139 | return -errno; | |
140 | return ret; | |
141 | } | |
142 | ||
143 | #ifndef SIN6_LEN_RFC2133 | |
144 | #define SIN6_LEN_RFC2133 24 | |
145 | #endif | |
146 | ||
147 | static socklen_t get_addrlen(const struct service_fixture *const srv, | |
148 | const bool minimal) | |
149 | { | |
150 | switch (srv->protocol.domain) { | |
151 | case AF_UNSPEC: | |
152 | case AF_INET: | |
153 | return sizeof(srv->ipv4_addr); | |
154 | ||
155 | case AF_INET6: | |
156 | if (minimal) | |
157 | return SIN6_LEN_RFC2133; | |
158 | return sizeof(srv->ipv6_addr); | |
159 | ||
160 | case AF_UNIX: | |
161 | if (minimal) | |
162 | return sizeof(srv->unix_addr) - | |
163 | sizeof(srv->unix_addr.sun_path); | |
164 | return srv->unix_addr_len; | |
165 | ||
166 | default: | |
167 | return 0; | |
168 | } | |
169 | } | |
170 | ||
171 | static void set_port(struct service_fixture *const srv, uint16_t port) | |
172 | { | |
173 | switch (srv->protocol.domain) { | |
174 | case AF_UNSPEC: | |
175 | case AF_INET: | |
176 | srv->ipv4_addr.sin_port = htons(port); | |
177 | return; | |
178 | ||
179 | case AF_INET6: | |
180 | srv->ipv6_addr.sin6_port = htons(port); | |
181 | return; | |
182 | ||
183 | default: | |
184 | return; | |
185 | } | |
186 | } | |
187 | ||
188 | static uint16_t get_binded_port(int socket_fd, | |
189 | const struct protocol_variant *const prot) | |
190 | { | |
191 | struct sockaddr_in ipv4_addr; | |
192 | struct sockaddr_in6 ipv6_addr; | |
193 | socklen_t ipv4_addr_len, ipv6_addr_len; | |
194 | ||
195 | /* Gets binded port. */ | |
196 | switch (prot->domain) { | |
197 | case AF_UNSPEC: | |
198 | case AF_INET: | |
199 | ipv4_addr_len = sizeof(ipv4_addr); | |
200 | getsockname(socket_fd, &ipv4_addr, &ipv4_addr_len); | |
201 | return ntohs(ipv4_addr.sin_port); | |
202 | ||
203 | case AF_INET6: | |
204 | ipv6_addr_len = sizeof(ipv6_addr); | |
205 | getsockname(socket_fd, &ipv6_addr, &ipv6_addr_len); | |
206 | return ntohs(ipv6_addr.sin6_port); | |
207 | ||
208 | default: | |
209 | return 0; | |
210 | } | |
211 | } | |
212 | ||
213 | static int bind_variant_addrlen(const int sock_fd, | |
214 | const struct service_fixture *const srv, | |
215 | const socklen_t addrlen) | |
216 | { | |
217 | int ret; | |
218 | ||
219 | switch (srv->protocol.domain) { | |
220 | case AF_UNSPEC: | |
221 | case AF_INET: | |
222 | ret = bind(sock_fd, &srv->ipv4_addr, addrlen); | |
223 | break; | |
224 | ||
225 | case AF_INET6: | |
226 | ret = bind(sock_fd, &srv->ipv6_addr, addrlen); | |
227 | break; | |
228 | ||
229 | case AF_UNIX: | |
230 | ret = bind(sock_fd, &srv->unix_addr, addrlen); | |
231 | break; | |
232 | ||
233 | default: | |
234 | errno = EAFNOSUPPORT; | |
235 | return -errno; | |
236 | } | |
237 | ||
238 | if (ret < 0) | |
239 | return -errno; | |
240 | return ret; | |
241 | } | |
242 | ||
243 | static int bind_variant(const int sock_fd, | |
244 | const struct service_fixture *const srv) | |
245 | { | |
246 | return bind_variant_addrlen(sock_fd, srv, get_addrlen(srv, false)); | |
247 | } | |
248 | ||
249 | static int connect_variant_addrlen(const int sock_fd, | |
250 | const struct service_fixture *const srv, | |
251 | const socklen_t addrlen) | |
252 | { | |
253 | int ret; | |
254 | ||
255 | switch (srv->protocol.domain) { | |
256 | case AF_UNSPEC: | |
257 | case AF_INET: | |
258 | ret = connect(sock_fd, &srv->ipv4_addr, addrlen); | |
259 | break; | |
260 | ||
261 | case AF_INET6: | |
262 | ret = connect(sock_fd, &srv->ipv6_addr, addrlen); | |
263 | break; | |
264 | ||
265 | case AF_UNIX: | |
266 | ret = connect(sock_fd, &srv->unix_addr, addrlen); | |
267 | break; | |
268 | ||
269 | default: | |
270 | errno = -EAFNOSUPPORT; | |
271 | return -errno; | |
272 | } | |
273 | ||
274 | if (ret < 0) | |
275 | return -errno; | |
276 | return ret; | |
277 | } | |
278 | ||
279 | static int connect_variant(const int sock_fd, | |
280 | const struct service_fixture *const srv) | |
281 | { | |
282 | return connect_variant_addrlen(sock_fd, srv, get_addrlen(srv, false)); | |
283 | } | |
284 | ||
285 | FIXTURE(protocol) | |
286 | { | |
287 | struct service_fixture srv0, srv1, srv2, unspec_any0, unspec_srv0; | |
288 | }; | |
289 | ||
290 | FIXTURE_VARIANT(protocol) | |
291 | { | |
292 | const enum sandbox_type sandbox; | |
293 | const struct protocol_variant prot; | |
294 | }; | |
295 | ||
296 | FIXTURE_SETUP(protocol) | |
297 | { | |
298 | const struct protocol_variant prot_unspec = { | |
299 | .domain = AF_UNSPEC, | |
300 | .type = SOCK_STREAM, | |
301 | }; | |
302 | ||
303 | disable_caps(_metadata); | |
304 | ||
305 | ASSERT_EQ(0, set_service(&self->srv0, variant->prot, 0)); | |
306 | ASSERT_EQ(0, set_service(&self->srv1, variant->prot, 1)); | |
307 | ASSERT_EQ(0, set_service(&self->srv2, variant->prot, 2)); | |
308 | ||
309 | ASSERT_EQ(0, set_service(&self->unspec_srv0, prot_unspec, 0)); | |
310 | ||
311 | ASSERT_EQ(0, set_service(&self->unspec_any0, prot_unspec, 0)); | |
312 | self->unspec_any0.ipv4_addr.sin_addr.s_addr = htonl(INADDR_ANY); | |
313 | ||
314 | setup_loopback(_metadata); | |
315 | }; | |
316 | ||
317 | FIXTURE_TEARDOWN(protocol) | |
318 | { | |
319 | } | |
320 | ||
321 | /* clang-format off */ | |
322 | FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_tcp) { | |
323 | /* clang-format on */ | |
324 | .sandbox = NO_SANDBOX, | |
325 | .prot = { | |
326 | .domain = AF_INET, | |
327 | .type = SOCK_STREAM, | |
328 | }, | |
329 | }; | |
330 | ||
331 | /* clang-format off */ | |
332 | FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_tcp) { | |
333 | /* clang-format on */ | |
334 | .sandbox = NO_SANDBOX, | |
335 | .prot = { | |
336 | .domain = AF_INET6, | |
337 | .type = SOCK_STREAM, | |
338 | }, | |
339 | }; | |
340 | ||
341 | /* clang-format off */ | |
342 | FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_udp) { | |
343 | /* clang-format on */ | |
344 | .sandbox = NO_SANDBOX, | |
345 | .prot = { | |
346 | .domain = AF_INET, | |
347 | .type = SOCK_DGRAM, | |
348 | }, | |
349 | }; | |
350 | ||
351 | /* clang-format off */ | |
352 | FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_udp) { | |
353 | /* clang-format on */ | |
354 | .sandbox = NO_SANDBOX, | |
355 | .prot = { | |
356 | .domain = AF_INET6, | |
357 | .type = SOCK_DGRAM, | |
358 | }, | |
359 | }; | |
360 | ||
361 | /* clang-format off */ | |
362 | FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_unix_stream) { | |
363 | /* clang-format on */ | |
364 | .sandbox = NO_SANDBOX, | |
365 | .prot = { | |
366 | .domain = AF_UNIX, | |
367 | .type = SOCK_STREAM, | |
368 | }, | |
369 | }; | |
370 | ||
371 | /* clang-format off */ | |
372 | FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_unix_datagram) { | |
373 | /* clang-format on */ | |
374 | .sandbox = NO_SANDBOX, | |
375 | .prot = { | |
376 | .domain = AF_UNIX, | |
377 | .type = SOCK_DGRAM, | |
378 | }, | |
379 | }; | |
380 | ||
381 | /* clang-format off */ | |
382 | FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_tcp) { | |
383 | /* clang-format on */ | |
384 | .sandbox = TCP_SANDBOX, | |
385 | .prot = { | |
386 | .domain = AF_INET, | |
387 | .type = SOCK_STREAM, | |
388 | }, | |
389 | }; | |
390 | ||
391 | /* clang-format off */ | |
392 | FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_tcp) { | |
393 | /* clang-format on */ | |
394 | .sandbox = TCP_SANDBOX, | |
395 | .prot = { | |
396 | .domain = AF_INET6, | |
397 | .type = SOCK_STREAM, | |
398 | }, | |
399 | }; | |
400 | ||
401 | /* clang-format off */ | |
402 | FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_udp) { | |
403 | /* clang-format on */ | |
404 | .sandbox = TCP_SANDBOX, | |
405 | .prot = { | |
406 | .domain = AF_INET, | |
407 | .type = SOCK_DGRAM, | |
408 | }, | |
409 | }; | |
410 | ||
411 | /* clang-format off */ | |
412 | FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_udp) { | |
413 | /* clang-format on */ | |
414 | .sandbox = TCP_SANDBOX, | |
415 | .prot = { | |
416 | .domain = AF_INET6, | |
417 | .type = SOCK_DGRAM, | |
418 | }, | |
419 | }; | |
420 | ||
421 | /* clang-format off */ | |
422 | FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_unix_stream) { | |
423 | /* clang-format on */ | |
424 | .sandbox = TCP_SANDBOX, | |
425 | .prot = { | |
426 | .domain = AF_UNIX, | |
427 | .type = SOCK_STREAM, | |
428 | }, | |
429 | }; | |
430 | ||
431 | /* clang-format off */ | |
432 | FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_unix_datagram) { | |
433 | /* clang-format on */ | |
434 | .sandbox = TCP_SANDBOX, | |
435 | .prot = { | |
436 | .domain = AF_UNIX, | |
437 | .type = SOCK_DGRAM, | |
438 | }, | |
439 | }; | |
440 | ||
441 | static void test_bind_and_connect(struct __test_metadata *const _metadata, | |
442 | const struct service_fixture *const srv, | |
443 | const bool deny_bind, const bool deny_connect) | |
444 | { | |
445 | char buf = '\0'; | |
446 | int inval_fd, bind_fd, client_fd, status, ret; | |
447 | pid_t child; | |
448 | ||
449 | /* Starts invalid addrlen tests with bind. */ | |
450 | inval_fd = socket_variant(srv); | |
451 | ASSERT_LE(0, inval_fd) | |
452 | { | |
453 | TH_LOG("Failed to create socket: %s", strerror(errno)); | |
454 | } | |
455 | ||
456 | /* Tries to bind with zero as addrlen. */ | |
457 | EXPECT_EQ(-EINVAL, bind_variant_addrlen(inval_fd, srv, 0)); | |
458 | ||
459 | /* Tries to bind with too small addrlen. */ | |
460 | EXPECT_EQ(-EINVAL, bind_variant_addrlen(inval_fd, srv, | |
461 | get_addrlen(srv, true) - 1)); | |
462 | ||
463 | /* Tries to bind with minimal addrlen. */ | |
464 | ret = bind_variant_addrlen(inval_fd, srv, get_addrlen(srv, true)); | |
465 | if (deny_bind) { | |
466 | EXPECT_EQ(-EACCES, ret); | |
467 | } else { | |
468 | EXPECT_EQ(0, ret) | |
469 | { | |
470 | TH_LOG("Failed to bind to socket: %s", strerror(errno)); | |
471 | } | |
472 | } | |
473 | EXPECT_EQ(0, close(inval_fd)); | |
474 | ||
475 | /* Starts invalid addrlen tests with connect. */ | |
476 | inval_fd = socket_variant(srv); | |
477 | ASSERT_LE(0, inval_fd); | |
478 | ||
479 | /* Tries to connect with zero as addrlen. */ | |
480 | EXPECT_EQ(-EINVAL, connect_variant_addrlen(inval_fd, srv, 0)); | |
481 | ||
482 | /* Tries to connect with too small addrlen. */ | |
483 | EXPECT_EQ(-EINVAL, connect_variant_addrlen(inval_fd, srv, | |
484 | get_addrlen(srv, true) - 1)); | |
485 | ||
486 | /* Tries to connect with minimal addrlen. */ | |
487 | ret = connect_variant_addrlen(inval_fd, srv, get_addrlen(srv, true)); | |
488 | if (srv->protocol.domain == AF_UNIX) { | |
489 | EXPECT_EQ(-EINVAL, ret); | |
490 | } else if (deny_connect) { | |
491 | EXPECT_EQ(-EACCES, ret); | |
492 | } else if (srv->protocol.type == SOCK_STREAM) { | |
493 | /* No listening server, whatever the value of deny_bind. */ | |
494 | EXPECT_EQ(-ECONNREFUSED, ret); | |
495 | } else { | |
496 | EXPECT_EQ(0, ret) | |
497 | { | |
498 | TH_LOG("Failed to connect to socket: %s", | |
499 | strerror(errno)); | |
500 | } | |
501 | } | |
502 | EXPECT_EQ(0, close(inval_fd)); | |
503 | ||
504 | /* Starts connection tests. */ | |
505 | bind_fd = socket_variant(srv); | |
506 | ASSERT_LE(0, bind_fd); | |
507 | ||
508 | ret = bind_variant(bind_fd, srv); | |
509 | if (deny_bind) { | |
510 | EXPECT_EQ(-EACCES, ret); | |
511 | } else { | |
512 | EXPECT_EQ(0, ret); | |
513 | ||
514 | /* Creates a listening socket. */ | |
515 | if (srv->protocol.type == SOCK_STREAM) | |
516 | EXPECT_EQ(0, listen(bind_fd, backlog)); | |
517 | } | |
518 | ||
519 | child = fork(); | |
520 | ASSERT_LE(0, child); | |
521 | if (child == 0) { | |
522 | int connect_fd, ret; | |
523 | ||
524 | /* Closes listening socket for the child. */ | |
525 | EXPECT_EQ(0, close(bind_fd)); | |
526 | ||
527 | /* Starts connection tests. */ | |
528 | connect_fd = socket_variant(srv); | |
529 | ASSERT_LE(0, connect_fd); | |
530 | ret = connect_variant(connect_fd, srv); | |
531 | if (deny_connect) { | |
532 | EXPECT_EQ(-EACCES, ret); | |
533 | } else if (deny_bind) { | |
534 | /* No listening server. */ | |
535 | EXPECT_EQ(-ECONNREFUSED, ret); | |
536 | } else { | |
537 | EXPECT_EQ(0, ret); | |
538 | EXPECT_EQ(1, write(connect_fd, ".", 1)); | |
539 | } | |
540 | ||
541 | EXPECT_EQ(0, close(connect_fd)); | |
542 | _exit(_metadata->passed ? EXIT_SUCCESS : EXIT_FAILURE); | |
543 | return; | |
544 | } | |
545 | ||
546 | /* Accepts connection from the child. */ | |
547 | client_fd = bind_fd; | |
548 | if (!deny_bind && !deny_connect) { | |
549 | if (srv->protocol.type == SOCK_STREAM) { | |
550 | client_fd = accept(bind_fd, NULL, 0); | |
551 | ASSERT_LE(0, client_fd); | |
552 | } | |
553 | ||
554 | EXPECT_EQ(1, read(client_fd, &buf, 1)); | |
555 | EXPECT_EQ('.', buf); | |
556 | } | |
557 | ||
558 | EXPECT_EQ(child, waitpid(child, &status, 0)); | |
559 | EXPECT_EQ(1, WIFEXITED(status)); | |
560 | EXPECT_EQ(EXIT_SUCCESS, WEXITSTATUS(status)); | |
561 | ||
562 | /* Closes connection, if any. */ | |
563 | if (client_fd != bind_fd) | |
564 | EXPECT_LE(0, close(client_fd)); | |
565 | ||
566 | /* Closes listening socket. */ | |
567 | EXPECT_EQ(0, close(bind_fd)); | |
568 | } | |
569 | ||
570 | TEST_F(protocol, bind) | |
571 | { | |
572 | if (variant->sandbox == TCP_SANDBOX) { | |
573 | const struct landlock_ruleset_attr ruleset_attr = { | |
574 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
575 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
576 | }; | |
577 | const struct landlock_net_port_attr tcp_bind_connect_p0 = { | |
578 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
579 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
580 | .port = self->srv0.port, | |
581 | }; | |
582 | const struct landlock_net_port_attr tcp_connect_p1 = { | |
583 | .allowed_access = LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
584 | .port = self->srv1.port, | |
585 | }; | |
586 | int ruleset_fd; | |
587 | ||
588 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
589 | sizeof(ruleset_attr), 0); | |
590 | ASSERT_LE(0, ruleset_fd); | |
591 | ||
592 | /* Allows connect and bind for the first port. */ | |
593 | ASSERT_EQ(0, | |
594 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
595 | &tcp_bind_connect_p0, 0)); | |
596 | ||
597 | /* Allows connect and denies bind for the second port. */ | |
598 | ASSERT_EQ(0, | |
599 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
600 | &tcp_connect_p1, 0)); | |
601 | ||
602 | enforce_ruleset(_metadata, ruleset_fd); | |
603 | EXPECT_EQ(0, close(ruleset_fd)); | |
604 | } | |
605 | ||
606 | /* Binds a socket to the first port. */ | |
607 | test_bind_and_connect(_metadata, &self->srv0, false, false); | |
608 | ||
609 | /* Binds a socket to the second port. */ | |
610 | test_bind_and_connect(_metadata, &self->srv1, | |
611 | is_restricted(&variant->prot, variant->sandbox), | |
612 | false); | |
613 | ||
614 | /* Binds a socket to the third port. */ | |
615 | test_bind_and_connect(_metadata, &self->srv2, | |
616 | is_restricted(&variant->prot, variant->sandbox), | |
617 | is_restricted(&variant->prot, variant->sandbox)); | |
618 | } | |
619 | ||
620 | TEST_F(protocol, connect) | |
621 | { | |
622 | if (variant->sandbox == TCP_SANDBOX) { | |
623 | const struct landlock_ruleset_attr ruleset_attr = { | |
624 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
625 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
626 | }; | |
627 | const struct landlock_net_port_attr tcp_bind_connect_p0 = { | |
628 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
629 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
630 | .port = self->srv0.port, | |
631 | }; | |
632 | const struct landlock_net_port_attr tcp_bind_p1 = { | |
633 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
634 | .port = self->srv1.port, | |
635 | }; | |
636 | int ruleset_fd; | |
637 | ||
638 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
639 | sizeof(ruleset_attr), 0); | |
640 | ASSERT_LE(0, ruleset_fd); | |
641 | ||
642 | /* Allows connect and bind for the first port. */ | |
643 | ASSERT_EQ(0, | |
644 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
645 | &tcp_bind_connect_p0, 0)); | |
646 | ||
647 | /* Allows bind and denies connect for the second port. */ | |
648 | ASSERT_EQ(0, | |
649 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
650 | &tcp_bind_p1, 0)); | |
651 | ||
652 | enforce_ruleset(_metadata, ruleset_fd); | |
653 | EXPECT_EQ(0, close(ruleset_fd)); | |
654 | } | |
655 | ||
656 | test_bind_and_connect(_metadata, &self->srv0, false, false); | |
657 | ||
658 | test_bind_and_connect(_metadata, &self->srv1, false, | |
659 | is_restricted(&variant->prot, variant->sandbox)); | |
660 | ||
661 | test_bind_and_connect(_metadata, &self->srv2, | |
662 | is_restricted(&variant->prot, variant->sandbox), | |
663 | is_restricted(&variant->prot, variant->sandbox)); | |
664 | } | |
665 | ||
666 | TEST_F(protocol, bind_unspec) | |
667 | { | |
668 | const struct landlock_ruleset_attr ruleset_attr = { | |
669 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP, | |
670 | }; | |
671 | const struct landlock_net_port_attr tcp_bind = { | |
672 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
673 | .port = self->srv0.port, | |
674 | }; | |
675 | int bind_fd, ret; | |
676 | ||
677 | if (variant->sandbox == TCP_SANDBOX) { | |
678 | const int ruleset_fd = landlock_create_ruleset( | |
679 | &ruleset_attr, sizeof(ruleset_attr), 0); | |
680 | ASSERT_LE(0, ruleset_fd); | |
681 | ||
682 | /* Allows bind. */ | |
683 | ASSERT_EQ(0, | |
684 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
685 | &tcp_bind, 0)); | |
686 | enforce_ruleset(_metadata, ruleset_fd); | |
687 | EXPECT_EQ(0, close(ruleset_fd)); | |
688 | } | |
689 | ||
690 | bind_fd = socket_variant(&self->srv0); | |
691 | ASSERT_LE(0, bind_fd); | |
692 | ||
693 | /* Allowed bind on AF_UNSPEC/INADDR_ANY. */ | |
694 | ret = bind_variant(bind_fd, &self->unspec_any0); | |
695 | if (variant->prot.domain == AF_INET) { | |
696 | EXPECT_EQ(0, ret) | |
697 | { | |
698 | TH_LOG("Failed to bind to unspec/any socket: %s", | |
699 | strerror(errno)); | |
700 | } | |
701 | } else { | |
702 | EXPECT_EQ(-EINVAL, ret); | |
703 | } | |
704 | EXPECT_EQ(0, close(bind_fd)); | |
705 | ||
706 | if (variant->sandbox == TCP_SANDBOX) { | |
707 | const int ruleset_fd = landlock_create_ruleset( | |
708 | &ruleset_attr, sizeof(ruleset_attr), 0); | |
709 | ASSERT_LE(0, ruleset_fd); | |
710 | ||
711 | /* Denies bind. */ | |
712 | enforce_ruleset(_metadata, ruleset_fd); | |
713 | EXPECT_EQ(0, close(ruleset_fd)); | |
714 | } | |
715 | ||
716 | bind_fd = socket_variant(&self->srv0); | |
717 | ASSERT_LE(0, bind_fd); | |
718 | ||
719 | /* Denied bind on AF_UNSPEC/INADDR_ANY. */ | |
720 | ret = bind_variant(bind_fd, &self->unspec_any0); | |
721 | if (variant->prot.domain == AF_INET) { | |
722 | if (is_restricted(&variant->prot, variant->sandbox)) { | |
723 | EXPECT_EQ(-EACCES, ret); | |
724 | } else { | |
725 | EXPECT_EQ(0, ret); | |
726 | } | |
727 | } else { | |
728 | EXPECT_EQ(-EINVAL, ret); | |
729 | } | |
730 | EXPECT_EQ(0, close(bind_fd)); | |
731 | ||
732 | /* Checks bind with AF_UNSPEC and the loopback address. */ | |
733 | bind_fd = socket_variant(&self->srv0); | |
734 | ASSERT_LE(0, bind_fd); | |
735 | ret = bind_variant(bind_fd, &self->unspec_srv0); | |
736 | if (variant->prot.domain == AF_INET) { | |
737 | EXPECT_EQ(-EAFNOSUPPORT, ret); | |
738 | } else { | |
739 | EXPECT_EQ(-EINVAL, ret) | |
740 | { | |
741 | TH_LOG("Wrong bind error: %s", strerror(errno)); | |
742 | } | |
743 | } | |
744 | EXPECT_EQ(0, close(bind_fd)); | |
745 | } | |
746 | ||
747 | TEST_F(protocol, connect_unspec) | |
748 | { | |
749 | const struct landlock_ruleset_attr ruleset_attr = { | |
750 | .handled_access_net = LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
751 | }; | |
752 | const struct landlock_net_port_attr tcp_connect = { | |
753 | .allowed_access = LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
754 | .port = self->srv0.port, | |
755 | }; | |
756 | int bind_fd, client_fd, status; | |
757 | pid_t child; | |
758 | ||
759 | /* Specific connection tests. */ | |
760 | bind_fd = socket_variant(&self->srv0); | |
761 | ASSERT_LE(0, bind_fd); | |
762 | EXPECT_EQ(0, bind_variant(bind_fd, &self->srv0)); | |
763 | if (self->srv0.protocol.type == SOCK_STREAM) | |
764 | EXPECT_EQ(0, listen(bind_fd, backlog)); | |
765 | ||
766 | child = fork(); | |
767 | ASSERT_LE(0, child); | |
768 | if (child == 0) { | |
769 | int connect_fd, ret; | |
770 | ||
771 | /* Closes listening socket for the child. */ | |
772 | EXPECT_EQ(0, close(bind_fd)); | |
773 | ||
774 | connect_fd = socket_variant(&self->srv0); | |
775 | ASSERT_LE(0, connect_fd); | |
776 | EXPECT_EQ(0, connect_variant(connect_fd, &self->srv0)); | |
777 | ||
778 | /* Tries to connect again, or set peer. */ | |
779 | ret = connect_variant(connect_fd, &self->srv0); | |
780 | if (self->srv0.protocol.type == SOCK_STREAM) { | |
781 | EXPECT_EQ(-EISCONN, ret); | |
782 | } else { | |
783 | EXPECT_EQ(0, ret); | |
784 | } | |
785 | ||
786 | if (variant->sandbox == TCP_SANDBOX) { | |
787 | const int ruleset_fd = landlock_create_ruleset( | |
788 | &ruleset_attr, sizeof(ruleset_attr), 0); | |
789 | ASSERT_LE(0, ruleset_fd); | |
790 | ||
791 | /* Allows connect. */ | |
792 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, | |
793 | LANDLOCK_RULE_NET_PORT, | |
794 | &tcp_connect, 0)); | |
795 | enforce_ruleset(_metadata, ruleset_fd); | |
796 | EXPECT_EQ(0, close(ruleset_fd)); | |
797 | } | |
798 | ||
799 | /* Disconnects already connected socket, or set peer. */ | |
800 | ret = connect_variant(connect_fd, &self->unspec_any0); | |
801 | if (self->srv0.protocol.domain == AF_UNIX && | |
802 | self->srv0.protocol.type == SOCK_STREAM) { | |
803 | EXPECT_EQ(-EINVAL, ret); | |
804 | } else { | |
805 | EXPECT_EQ(0, ret); | |
806 | } | |
807 | ||
808 | /* Tries to reconnect, or set peer. */ | |
809 | ret = connect_variant(connect_fd, &self->srv0); | |
810 | if (self->srv0.protocol.domain == AF_UNIX && | |
811 | self->srv0.protocol.type == SOCK_STREAM) { | |
812 | EXPECT_EQ(-EISCONN, ret); | |
813 | } else { | |
814 | EXPECT_EQ(0, ret); | |
815 | } | |
816 | ||
817 | if (variant->sandbox == TCP_SANDBOX) { | |
818 | const int ruleset_fd = landlock_create_ruleset( | |
819 | &ruleset_attr, sizeof(ruleset_attr), 0); | |
820 | ASSERT_LE(0, ruleset_fd); | |
821 | ||
822 | /* Denies connect. */ | |
823 | enforce_ruleset(_metadata, ruleset_fd); | |
824 | EXPECT_EQ(0, close(ruleset_fd)); | |
825 | } | |
826 | ||
827 | ret = connect_variant(connect_fd, &self->unspec_any0); | |
828 | if (self->srv0.protocol.domain == AF_UNIX && | |
829 | self->srv0.protocol.type == SOCK_STREAM) { | |
830 | EXPECT_EQ(-EINVAL, ret); | |
831 | } else { | |
832 | /* Always allowed to disconnect. */ | |
833 | EXPECT_EQ(0, ret); | |
834 | } | |
835 | ||
836 | EXPECT_EQ(0, close(connect_fd)); | |
837 | _exit(_metadata->passed ? EXIT_SUCCESS : EXIT_FAILURE); | |
838 | return; | |
839 | } | |
840 | ||
841 | client_fd = bind_fd; | |
842 | if (self->srv0.protocol.type == SOCK_STREAM) { | |
843 | client_fd = accept(bind_fd, NULL, 0); | |
844 | ASSERT_LE(0, client_fd); | |
845 | } | |
846 | ||
847 | EXPECT_EQ(child, waitpid(child, &status, 0)); | |
848 | EXPECT_EQ(1, WIFEXITED(status)); | |
849 | EXPECT_EQ(EXIT_SUCCESS, WEXITSTATUS(status)); | |
850 | ||
851 | /* Closes connection, if any. */ | |
852 | if (client_fd != bind_fd) | |
853 | EXPECT_LE(0, close(client_fd)); | |
854 | ||
855 | /* Closes listening socket. */ | |
856 | EXPECT_EQ(0, close(bind_fd)); | |
857 | } | |
858 | ||
859 | FIXTURE(ipv4) | |
860 | { | |
861 | struct service_fixture srv0, srv1; | |
862 | }; | |
863 | ||
864 | FIXTURE_VARIANT(ipv4) | |
865 | { | |
866 | const enum sandbox_type sandbox; | |
867 | const int type; | |
868 | }; | |
869 | ||
870 | /* clang-format off */ | |
871 | FIXTURE_VARIANT_ADD(ipv4, no_sandbox_with_tcp) { | |
872 | /* clang-format on */ | |
873 | .sandbox = NO_SANDBOX, | |
874 | .type = SOCK_STREAM, | |
875 | }; | |
876 | ||
877 | /* clang-format off */ | |
878 | FIXTURE_VARIANT_ADD(ipv4, tcp_sandbox_with_tcp) { | |
879 | /* clang-format on */ | |
880 | .sandbox = TCP_SANDBOX, | |
881 | .type = SOCK_STREAM, | |
882 | }; | |
883 | ||
884 | /* clang-format off */ | |
885 | FIXTURE_VARIANT_ADD(ipv4, no_sandbox_with_udp) { | |
886 | /* clang-format on */ | |
887 | .sandbox = NO_SANDBOX, | |
888 | .type = SOCK_DGRAM, | |
889 | }; | |
890 | ||
891 | /* clang-format off */ | |
892 | FIXTURE_VARIANT_ADD(ipv4, tcp_sandbox_with_udp) { | |
893 | /* clang-format on */ | |
894 | .sandbox = TCP_SANDBOX, | |
895 | .type = SOCK_DGRAM, | |
896 | }; | |
897 | ||
898 | FIXTURE_SETUP(ipv4) | |
899 | { | |
900 | const struct protocol_variant prot = { | |
901 | .domain = AF_INET, | |
902 | .type = variant->type, | |
903 | }; | |
904 | ||
905 | disable_caps(_metadata); | |
906 | ||
907 | set_service(&self->srv0, prot, 0); | |
908 | set_service(&self->srv1, prot, 1); | |
909 | ||
910 | setup_loopback(_metadata); | |
911 | }; | |
912 | ||
913 | FIXTURE_TEARDOWN(ipv4) | |
914 | { | |
915 | } | |
916 | ||
917 | TEST_F(ipv4, from_unix_to_inet) | |
918 | { | |
919 | int unix_stream_fd, unix_dgram_fd; | |
920 | ||
921 | if (variant->sandbox == TCP_SANDBOX) { | |
922 | const struct landlock_ruleset_attr ruleset_attr = { | |
923 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
924 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
925 | }; | |
926 | const struct landlock_net_port_attr tcp_bind_connect_p0 = { | |
927 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
928 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
929 | .port = self->srv0.port, | |
930 | }; | |
931 | int ruleset_fd; | |
932 | ||
933 | /* Denies connect and bind to check errno value. */ | |
934 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
935 | sizeof(ruleset_attr), 0); | |
936 | ASSERT_LE(0, ruleset_fd); | |
937 | ||
938 | /* Allows connect and bind for srv0. */ | |
939 | ASSERT_EQ(0, | |
940 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
941 | &tcp_bind_connect_p0, 0)); | |
942 | ||
943 | enforce_ruleset(_metadata, ruleset_fd); | |
944 | EXPECT_EQ(0, close(ruleset_fd)); | |
945 | } | |
946 | ||
947 | unix_stream_fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0); | |
948 | ASSERT_LE(0, unix_stream_fd); | |
949 | ||
950 | unix_dgram_fd = socket(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0); | |
951 | ASSERT_LE(0, unix_dgram_fd); | |
952 | ||
953 | /* Checks unix stream bind and connect for srv0. */ | |
954 | EXPECT_EQ(-EINVAL, bind_variant(unix_stream_fd, &self->srv0)); | |
955 | EXPECT_EQ(-EINVAL, connect_variant(unix_stream_fd, &self->srv0)); | |
956 | ||
957 | /* Checks unix stream bind and connect for srv1. */ | |
958 | EXPECT_EQ(-EINVAL, bind_variant(unix_stream_fd, &self->srv1)) | |
959 | { | |
960 | TH_LOG("Wrong bind error: %s", strerror(errno)); | |
961 | } | |
962 | EXPECT_EQ(-EINVAL, connect_variant(unix_stream_fd, &self->srv1)); | |
963 | ||
964 | /* Checks unix datagram bind and connect for srv0. */ | |
965 | EXPECT_EQ(-EINVAL, bind_variant(unix_dgram_fd, &self->srv0)); | |
966 | EXPECT_EQ(-EINVAL, connect_variant(unix_dgram_fd, &self->srv0)); | |
967 | ||
968 | /* Checks unix datagram bind and connect for srv1. */ | |
969 | EXPECT_EQ(-EINVAL, bind_variant(unix_dgram_fd, &self->srv1)); | |
970 | EXPECT_EQ(-EINVAL, connect_variant(unix_dgram_fd, &self->srv1)); | |
971 | } | |
972 | ||
973 | FIXTURE(tcp_layers) | |
974 | { | |
975 | struct service_fixture srv0, srv1; | |
976 | }; | |
977 | ||
978 | FIXTURE_VARIANT(tcp_layers) | |
979 | { | |
980 | const size_t num_layers; | |
981 | const int domain; | |
982 | }; | |
983 | ||
984 | FIXTURE_SETUP(tcp_layers) | |
985 | { | |
986 | const struct protocol_variant prot = { | |
987 | .domain = variant->domain, | |
988 | .type = SOCK_STREAM, | |
989 | }; | |
990 | ||
991 | disable_caps(_metadata); | |
992 | ||
993 | ASSERT_EQ(0, set_service(&self->srv0, prot, 0)); | |
994 | ASSERT_EQ(0, set_service(&self->srv1, prot, 1)); | |
995 | ||
996 | setup_loopback(_metadata); | |
997 | }; | |
998 | ||
999 | FIXTURE_TEARDOWN(tcp_layers) | |
1000 | { | |
1001 | } | |
1002 | ||
1003 | /* clang-format off */ | |
1004 | FIXTURE_VARIANT_ADD(tcp_layers, no_sandbox_with_ipv4) { | |
1005 | /* clang-format on */ | |
1006 | .domain = AF_INET, | |
1007 | .num_layers = 0, | |
1008 | }; | |
1009 | ||
1010 | /* clang-format off */ | |
1011 | FIXTURE_VARIANT_ADD(tcp_layers, one_sandbox_with_ipv4) { | |
1012 | /* clang-format on */ | |
1013 | .domain = AF_INET, | |
1014 | .num_layers = 1, | |
1015 | }; | |
1016 | ||
1017 | /* clang-format off */ | |
1018 | FIXTURE_VARIANT_ADD(tcp_layers, two_sandboxes_with_ipv4) { | |
1019 | /* clang-format on */ | |
1020 | .domain = AF_INET, | |
1021 | .num_layers = 2, | |
1022 | }; | |
1023 | ||
1024 | /* clang-format off */ | |
1025 | FIXTURE_VARIANT_ADD(tcp_layers, three_sandboxes_with_ipv4) { | |
1026 | /* clang-format on */ | |
1027 | .domain = AF_INET, | |
1028 | .num_layers = 3, | |
1029 | }; | |
1030 | ||
1031 | /* clang-format off */ | |
1032 | FIXTURE_VARIANT_ADD(tcp_layers, no_sandbox_with_ipv6) { | |
1033 | /* clang-format on */ | |
1034 | .domain = AF_INET6, | |
1035 | .num_layers = 0, | |
1036 | }; | |
1037 | ||
1038 | /* clang-format off */ | |
1039 | FIXTURE_VARIANT_ADD(tcp_layers, one_sandbox_with_ipv6) { | |
1040 | /* clang-format on */ | |
1041 | .domain = AF_INET6, | |
1042 | .num_layers = 1, | |
1043 | }; | |
1044 | ||
1045 | /* clang-format off */ | |
1046 | FIXTURE_VARIANT_ADD(tcp_layers, two_sandboxes_with_ipv6) { | |
1047 | /* clang-format on */ | |
1048 | .domain = AF_INET6, | |
1049 | .num_layers = 2, | |
1050 | }; | |
1051 | ||
1052 | /* clang-format off */ | |
1053 | FIXTURE_VARIANT_ADD(tcp_layers, three_sandboxes_with_ipv6) { | |
1054 | /* clang-format on */ | |
1055 | .domain = AF_INET6, | |
1056 | .num_layers = 3, | |
1057 | }; | |
1058 | ||
1059 | TEST_F(tcp_layers, ruleset_overlap) | |
1060 | { | |
1061 | const struct landlock_ruleset_attr ruleset_attr = { | |
1062 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1063 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1064 | }; | |
1065 | const struct landlock_net_port_attr tcp_bind = { | |
1066 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1067 | .port = self->srv0.port, | |
1068 | }; | |
1069 | const struct landlock_net_port_attr tcp_bind_connect = { | |
1070 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1071 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1072 | .port = self->srv0.port, | |
1073 | }; | |
1074 | ||
1075 | if (variant->num_layers >= 1) { | |
1076 | int ruleset_fd; | |
1077 | ||
1078 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
1079 | sizeof(ruleset_attr), 0); | |
1080 | ASSERT_LE(0, ruleset_fd); | |
1081 | ||
1082 | /* Allows bind. */ | |
1083 | ASSERT_EQ(0, | |
1084 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1085 | &tcp_bind, 0)); | |
1086 | /* Also allows bind, but allows connect too. */ | |
1087 | ASSERT_EQ(0, | |
1088 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1089 | &tcp_bind_connect, 0)); | |
1090 | enforce_ruleset(_metadata, ruleset_fd); | |
1091 | EXPECT_EQ(0, close(ruleset_fd)); | |
1092 | } | |
1093 | ||
1094 | if (variant->num_layers >= 2) { | |
1095 | int ruleset_fd; | |
1096 | ||
1097 | /* Creates another ruleset layer. */ | |
1098 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
1099 | sizeof(ruleset_attr), 0); | |
1100 | ASSERT_LE(0, ruleset_fd); | |
1101 | ||
1102 | /* Only allows bind. */ | |
1103 | ASSERT_EQ(0, | |
1104 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1105 | &tcp_bind, 0)); | |
1106 | enforce_ruleset(_metadata, ruleset_fd); | |
1107 | EXPECT_EQ(0, close(ruleset_fd)); | |
1108 | } | |
1109 | ||
1110 | if (variant->num_layers >= 3) { | |
1111 | int ruleset_fd; | |
1112 | ||
1113 | /* Creates another ruleset layer. */ | |
1114 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
1115 | sizeof(ruleset_attr), 0); | |
1116 | ASSERT_LE(0, ruleset_fd); | |
1117 | ||
1118 | /* Try to allow bind and connect. */ | |
1119 | ASSERT_EQ(0, | |
1120 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1121 | &tcp_bind_connect, 0)); | |
1122 | enforce_ruleset(_metadata, ruleset_fd); | |
1123 | EXPECT_EQ(0, close(ruleset_fd)); | |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * Forbids to connect to the socket because only one ruleset layer | |
1128 | * allows connect. | |
1129 | */ | |
1130 | test_bind_and_connect(_metadata, &self->srv0, false, | |
1131 | variant->num_layers >= 2); | |
1132 | } | |
1133 | ||
1134 | TEST_F(tcp_layers, ruleset_expand) | |
1135 | { | |
1136 | if (variant->num_layers >= 1) { | |
1137 | const struct landlock_ruleset_attr ruleset_attr = { | |
1138 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1139 | }; | |
1140 | /* Allows bind for srv0. */ | |
1141 | const struct landlock_net_port_attr bind_srv0 = { | |
1142 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1143 | .port = self->srv0.port, | |
1144 | }; | |
1145 | int ruleset_fd; | |
1146 | ||
1147 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
1148 | sizeof(ruleset_attr), 0); | |
1149 | ASSERT_LE(0, ruleset_fd); | |
1150 | ASSERT_EQ(0, | |
1151 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1152 | &bind_srv0, 0)); | |
1153 | enforce_ruleset(_metadata, ruleset_fd); | |
1154 | EXPECT_EQ(0, close(ruleset_fd)); | |
1155 | } | |
1156 | ||
1157 | if (variant->num_layers >= 2) { | |
1158 | /* Expands network mask with connect action. */ | |
1159 | const struct landlock_ruleset_attr ruleset_attr = { | |
1160 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1161 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1162 | }; | |
1163 | /* Allows bind for srv0 and connect to srv0. */ | |
1164 | const struct landlock_net_port_attr tcp_bind_connect_p0 = { | |
1165 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1166 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1167 | .port = self->srv0.port, | |
1168 | }; | |
1169 | /* Try to allow bind for srv1. */ | |
1170 | const struct landlock_net_port_attr tcp_bind_p1 = { | |
1171 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1172 | .port = self->srv1.port, | |
1173 | }; | |
1174 | int ruleset_fd; | |
1175 | ||
1176 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
1177 | sizeof(ruleset_attr), 0); | |
1178 | ASSERT_LE(0, ruleset_fd); | |
1179 | ASSERT_EQ(0, | |
1180 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1181 | &tcp_bind_connect_p0, 0)); | |
1182 | ASSERT_EQ(0, | |
1183 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1184 | &tcp_bind_p1, 0)); | |
1185 | enforce_ruleset(_metadata, ruleset_fd); | |
1186 | EXPECT_EQ(0, close(ruleset_fd)); | |
1187 | } | |
1188 | ||
1189 | if (variant->num_layers >= 3) { | |
1190 | const struct landlock_ruleset_attr ruleset_attr = { | |
1191 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1192 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1193 | }; | |
1194 | /* Allows connect to srv0, without bind rule. */ | |
1195 | const struct landlock_net_port_attr tcp_bind_p0 = { | |
1196 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1197 | .port = self->srv0.port, | |
1198 | }; | |
1199 | int ruleset_fd; | |
1200 | ||
1201 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
1202 | sizeof(ruleset_attr), 0); | |
1203 | ASSERT_LE(0, ruleset_fd); | |
1204 | ASSERT_EQ(0, | |
1205 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1206 | &tcp_bind_p0, 0)); | |
1207 | enforce_ruleset(_metadata, ruleset_fd); | |
1208 | EXPECT_EQ(0, close(ruleset_fd)); | |
1209 | } | |
1210 | ||
1211 | test_bind_and_connect(_metadata, &self->srv0, false, | |
1212 | variant->num_layers >= 3); | |
1213 | ||
1214 | test_bind_and_connect(_metadata, &self->srv1, variant->num_layers >= 1, | |
1215 | variant->num_layers >= 2); | |
1216 | } | |
1217 | ||
1218 | /* clang-format off */ | |
1219 | FIXTURE(mini) {}; | |
1220 | /* clang-format on */ | |
1221 | ||
1222 | FIXTURE_SETUP(mini) | |
1223 | { | |
1224 | disable_caps(_metadata); | |
1225 | ||
1226 | setup_loopback(_metadata); | |
1227 | }; | |
1228 | ||
1229 | FIXTURE_TEARDOWN(mini) | |
1230 | { | |
1231 | } | |
1232 | ||
1233 | /* clang-format off */ | |
1234 | ||
1235 | #define ACCESS_LAST LANDLOCK_ACCESS_NET_CONNECT_TCP | |
1236 | ||
1237 | #define ACCESS_ALL ( \ | |
1238 | LANDLOCK_ACCESS_NET_BIND_TCP | \ | |
1239 | LANDLOCK_ACCESS_NET_CONNECT_TCP) | |
1240 | ||
1241 | /* clang-format on */ | |
1242 | ||
1243 | TEST_F(mini, network_access_rights) | |
1244 | { | |
1245 | const struct landlock_ruleset_attr ruleset_attr = { | |
1246 | .handled_access_net = ACCESS_ALL, | |
1247 | }; | |
1248 | struct landlock_net_port_attr net_port = { | |
1249 | .port = sock_port_start, | |
1250 | }; | |
1251 | int ruleset_fd; | |
1252 | __u64 access; | |
1253 | ||
1254 | ruleset_fd = | |
1255 | landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); | |
1256 | ASSERT_LE(0, ruleset_fd); | |
1257 | ||
1258 | for (access = 1; access <= ACCESS_LAST; access <<= 1) { | |
1259 | net_port.allowed_access = access; | |
1260 | EXPECT_EQ(0, | |
1261 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1262 | &net_port, 0)) | |
1263 | { | |
1264 | TH_LOG("Failed to add rule with access 0x%llx: %s", | |
1265 | access, strerror(errno)); | |
1266 | } | |
1267 | } | |
1268 | EXPECT_EQ(0, close(ruleset_fd)); | |
1269 | } | |
1270 | ||
1271 | /* Checks invalid attribute, out of landlock network access range. */ | |
6471c9c4 | 1272 | TEST_F(mini, ruleset_with_unknown_access) |
a549d055 KM |
1273 | { |
1274 | __u64 access_mask; | |
1275 | ||
1276 | for (access_mask = 1ULL << 63; access_mask != ACCESS_LAST; | |
1277 | access_mask >>= 1) { | |
1278 | const struct landlock_ruleset_attr ruleset_attr = { | |
1279 | .handled_access_net = access_mask, | |
1280 | }; | |
1281 | ||
1282 | EXPECT_EQ(-1, landlock_create_ruleset(&ruleset_attr, | |
1283 | sizeof(ruleset_attr), 0)); | |
1284 | EXPECT_EQ(EINVAL, errno); | |
1285 | } | |
1286 | } | |
1287 | ||
6471c9c4 MS |
1288 | TEST_F(mini, rule_with_unknown_access) |
1289 | { | |
1290 | const struct landlock_ruleset_attr ruleset_attr = { | |
1291 | .handled_access_net = ACCESS_ALL, | |
1292 | }; | |
1293 | struct landlock_net_port_attr net_port = { | |
1294 | .port = sock_port_start, | |
1295 | }; | |
1296 | int ruleset_fd; | |
1297 | __u64 access; | |
1298 | ||
1299 | ruleset_fd = | |
1300 | landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); | |
1301 | ASSERT_LE(0, ruleset_fd); | |
1302 | ||
1303 | for (access = 1ULL << 63; access != ACCESS_LAST; access >>= 1) { | |
1304 | net_port.allowed_access = access; | |
1305 | EXPECT_EQ(-1, | |
1306 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1307 | &net_port, 0)); | |
1308 | EXPECT_EQ(EINVAL, errno); | |
1309 | } | |
1310 | EXPECT_EQ(0, close(ruleset_fd)); | |
1311 | } | |
1312 | ||
e2780a0b MS |
1313 | TEST_F(mini, rule_with_unhandled_access) |
1314 | { | |
1315 | struct landlock_ruleset_attr ruleset_attr = { | |
1316 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1317 | }; | |
1318 | struct landlock_net_port_attr net_port = { | |
1319 | .port = sock_port_start, | |
1320 | }; | |
1321 | int ruleset_fd; | |
1322 | __u64 access; | |
1323 | ||
1324 | ruleset_fd = | |
1325 | landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); | |
1326 | ASSERT_LE(0, ruleset_fd); | |
1327 | ||
1328 | for (access = 1; access > 0; access <<= 1) { | |
1329 | int err; | |
1330 | ||
1331 | net_port.allowed_access = access; | |
1332 | err = landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1333 | &net_port, 0); | |
1334 | if (access == ruleset_attr.handled_access_net) { | |
1335 | EXPECT_EQ(0, err); | |
1336 | } else { | |
1337 | EXPECT_EQ(-1, err); | |
1338 | EXPECT_EQ(EINVAL, errno); | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | EXPECT_EQ(0, close(ruleset_fd)); | |
1343 | } | |
1344 | ||
a549d055 KM |
1345 | TEST_F(mini, inval) |
1346 | { | |
1347 | const struct landlock_ruleset_attr ruleset_attr = { | |
1348 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | |
1349 | }; | |
1350 | const struct landlock_net_port_attr tcp_bind_connect = { | |
1351 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1352 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1353 | .port = sock_port_start, | |
1354 | }; | |
1355 | const struct landlock_net_port_attr tcp_denied = { | |
1356 | .allowed_access = 0, | |
1357 | .port = sock_port_start, | |
1358 | }; | |
1359 | const struct landlock_net_port_attr tcp_bind = { | |
1360 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1361 | .port = sock_port_start, | |
1362 | }; | |
1363 | int ruleset_fd; | |
1364 | ||
1365 | ruleset_fd = | |
1366 | landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); | |
1367 | ASSERT_LE(0, ruleset_fd); | |
1368 | ||
1369 | /* Checks unhandled allowed_access. */ | |
1370 | EXPECT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1371 | &tcp_bind_connect, 0)); | |
1372 | EXPECT_EQ(EINVAL, errno); | |
1373 | ||
1374 | /* Checks zero access value. */ | |
1375 | EXPECT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1376 | &tcp_denied, 0)); | |
1377 | EXPECT_EQ(ENOMSG, errno); | |
1378 | ||
1379 | /* Adds with legitimate values. */ | |
1380 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1381 | &tcp_bind, 0)); | |
1382 | } | |
1383 | ||
1384 | TEST_F(mini, tcp_port_overflow) | |
1385 | { | |
1386 | const struct landlock_ruleset_attr ruleset_attr = { | |
1387 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1388 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1389 | }; | |
1390 | const struct landlock_net_port_attr port_max_bind = { | |
1391 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1392 | .port = UINT16_MAX, | |
1393 | }; | |
1394 | const struct landlock_net_port_attr port_max_connect = { | |
1395 | .allowed_access = LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1396 | .port = UINT16_MAX, | |
1397 | }; | |
1398 | const struct landlock_net_port_attr port_overflow1 = { | |
1399 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1400 | .port = UINT16_MAX + 1, | |
1401 | }; | |
1402 | const struct landlock_net_port_attr port_overflow2 = { | |
1403 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1404 | .port = UINT16_MAX + 2, | |
1405 | }; | |
1406 | const struct landlock_net_port_attr port_overflow3 = { | |
1407 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1408 | .port = UINT32_MAX + 1UL, | |
1409 | }; | |
1410 | const struct landlock_net_port_attr port_overflow4 = { | |
1411 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1412 | .port = UINT32_MAX + 2UL, | |
1413 | }; | |
1414 | const struct protocol_variant ipv4_tcp = { | |
1415 | .domain = AF_INET, | |
1416 | .type = SOCK_STREAM, | |
1417 | }; | |
1418 | struct service_fixture srv_denied, srv_max_allowed; | |
1419 | int ruleset_fd; | |
1420 | ||
1421 | ASSERT_EQ(0, set_service(&srv_denied, ipv4_tcp, 0)); | |
1422 | ||
1423 | /* Be careful to avoid port inconsistencies. */ | |
1424 | srv_max_allowed = srv_denied; | |
1425 | srv_max_allowed.port = port_max_bind.port; | |
1426 | srv_max_allowed.ipv4_addr.sin_port = htons(port_max_bind.port); | |
1427 | ||
1428 | ruleset_fd = | |
1429 | landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); | |
1430 | ASSERT_LE(0, ruleset_fd); | |
1431 | ||
1432 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1433 | &port_max_bind, 0)); | |
1434 | ||
1435 | EXPECT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1436 | &port_overflow1, 0)); | |
1437 | EXPECT_EQ(EINVAL, errno); | |
1438 | ||
1439 | EXPECT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1440 | &port_overflow2, 0)); | |
1441 | EXPECT_EQ(EINVAL, errno); | |
1442 | ||
1443 | EXPECT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1444 | &port_overflow3, 0)); | |
1445 | EXPECT_EQ(EINVAL, errno); | |
1446 | ||
1447 | /* Interleaves with invalid rule additions. */ | |
1448 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1449 | &port_max_connect, 0)); | |
1450 | ||
1451 | EXPECT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1452 | &port_overflow4, 0)); | |
1453 | EXPECT_EQ(EINVAL, errno); | |
1454 | ||
1455 | enforce_ruleset(_metadata, ruleset_fd); | |
1456 | ||
1457 | test_bind_and_connect(_metadata, &srv_denied, true, true); | |
1458 | test_bind_and_connect(_metadata, &srv_max_allowed, false, false); | |
1459 | } | |
1460 | ||
1461 | FIXTURE(ipv4_tcp) | |
1462 | { | |
1463 | struct service_fixture srv0, srv1; | |
1464 | }; | |
1465 | ||
1466 | FIXTURE_SETUP(ipv4_tcp) | |
1467 | { | |
1468 | const struct protocol_variant ipv4_tcp = { | |
1469 | .domain = AF_INET, | |
1470 | .type = SOCK_STREAM, | |
1471 | }; | |
1472 | ||
1473 | disable_caps(_metadata); | |
1474 | ||
1475 | ASSERT_EQ(0, set_service(&self->srv0, ipv4_tcp, 0)); | |
1476 | ASSERT_EQ(0, set_service(&self->srv1, ipv4_tcp, 1)); | |
1477 | ||
1478 | setup_loopback(_metadata); | |
1479 | }; | |
1480 | ||
1481 | FIXTURE_TEARDOWN(ipv4_tcp) | |
1482 | { | |
1483 | } | |
1484 | ||
1485 | TEST_F(ipv4_tcp, port_endianness) | |
1486 | { | |
1487 | const struct landlock_ruleset_attr ruleset_attr = { | |
1488 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1489 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1490 | }; | |
1491 | const struct landlock_net_port_attr bind_host_endian_p0 = { | |
1492 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1493 | /* Host port format. */ | |
1494 | .port = self->srv0.port, | |
1495 | }; | |
1496 | const struct landlock_net_port_attr connect_big_endian_p0 = { | |
1497 | .allowed_access = LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1498 | /* Big endian port format. */ | |
1499 | .port = htons(self->srv0.port), | |
1500 | }; | |
1501 | const struct landlock_net_port_attr bind_connect_host_endian_p1 = { | |
1502 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1503 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1504 | /* Host port format. */ | |
1505 | .port = self->srv1.port, | |
1506 | }; | |
1507 | const unsigned int one = 1; | |
1508 | const char little_endian = *(const char *)&one; | |
1509 | int ruleset_fd; | |
1510 | ||
1511 | ruleset_fd = | |
1512 | landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); | |
1513 | ASSERT_LE(0, ruleset_fd); | |
1514 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1515 | &bind_host_endian_p0, 0)); | |
1516 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1517 | &connect_big_endian_p0, 0)); | |
1518 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1519 | &bind_connect_host_endian_p1, 0)); | |
1520 | enforce_ruleset(_metadata, ruleset_fd); | |
1521 | ||
1522 | /* No restriction for big endinan CPU. */ | |
1523 | test_bind_and_connect(_metadata, &self->srv0, false, little_endian); | |
1524 | ||
1525 | /* No restriction for any CPU. */ | |
1526 | test_bind_and_connect(_metadata, &self->srv1, false, false); | |
1527 | } | |
1528 | ||
1529 | TEST_F(ipv4_tcp, with_fs) | |
1530 | { | |
1531 | const struct landlock_ruleset_attr ruleset_attr_fs_net = { | |
1532 | .handled_access_fs = LANDLOCK_ACCESS_FS_READ_DIR, | |
1533 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1534 | }; | |
1535 | struct landlock_path_beneath_attr path_beneath = { | |
1536 | .allowed_access = LANDLOCK_ACCESS_FS_READ_DIR, | |
1537 | .parent_fd = -1, | |
1538 | }; | |
1539 | struct landlock_net_port_attr tcp_bind = { | |
1540 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, | |
1541 | .port = self->srv0.port, | |
1542 | }; | |
1543 | int ruleset_fd, bind_fd, dir_fd; | |
1544 | ||
1545 | /* Creates ruleset both for filesystem and network access. */ | |
1546 | ruleset_fd = landlock_create_ruleset(&ruleset_attr_fs_net, | |
1547 | sizeof(ruleset_attr_fs_net), 0); | |
1548 | ASSERT_LE(0, ruleset_fd); | |
1549 | ||
1550 | /* Adds a filesystem rule. */ | |
1551 | path_beneath.parent_fd = open("/dev", O_PATH | O_DIRECTORY | O_CLOEXEC); | |
1552 | ASSERT_LE(0, path_beneath.parent_fd); | |
1553 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_PATH_BENEATH, | |
1554 | &path_beneath, 0)); | |
1555 | EXPECT_EQ(0, close(path_beneath.parent_fd)); | |
1556 | ||
1557 | /* Adds a network rule. */ | |
1558 | ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1559 | &tcp_bind, 0)); | |
1560 | ||
1561 | enforce_ruleset(_metadata, ruleset_fd); | |
1562 | EXPECT_EQ(0, close(ruleset_fd)); | |
1563 | ||
1564 | /* Tests file access. */ | |
1565 | dir_fd = open("/dev", O_RDONLY); | |
1566 | EXPECT_LE(0, dir_fd); | |
1567 | EXPECT_EQ(0, close(dir_fd)); | |
1568 | ||
1569 | dir_fd = open("/", O_RDONLY); | |
1570 | EXPECT_EQ(-1, dir_fd); | |
1571 | EXPECT_EQ(EACCES, errno); | |
1572 | ||
1573 | /* Tests port binding. */ | |
1574 | bind_fd = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0); | |
1575 | ASSERT_LE(0, bind_fd); | |
1576 | EXPECT_EQ(0, bind_variant(bind_fd, &self->srv0)); | |
1577 | EXPECT_EQ(0, close(bind_fd)); | |
1578 | ||
1579 | bind_fd = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0); | |
1580 | ASSERT_LE(0, bind_fd); | |
1581 | EXPECT_EQ(-EACCES, bind_variant(bind_fd, &self->srv1)); | |
1582 | } | |
1583 | ||
1584 | FIXTURE(port_specific) | |
1585 | { | |
1586 | struct service_fixture srv0; | |
1587 | }; | |
1588 | ||
1589 | FIXTURE_VARIANT(port_specific) | |
1590 | { | |
1591 | const enum sandbox_type sandbox; | |
1592 | const struct protocol_variant prot; | |
1593 | }; | |
1594 | ||
1595 | /* clang-format off */ | |
1596 | FIXTURE_VARIANT_ADD(port_specific, no_sandbox_with_ipv4) { | |
1597 | /* clang-format on */ | |
1598 | .sandbox = NO_SANDBOX, | |
1599 | .prot = { | |
1600 | .domain = AF_INET, | |
1601 | .type = SOCK_STREAM, | |
1602 | }, | |
1603 | }; | |
1604 | ||
1605 | /* clang-format off */ | |
1606 | FIXTURE_VARIANT_ADD(port_specific, sandbox_with_ipv4) { | |
1607 | /* clang-format on */ | |
1608 | .sandbox = TCP_SANDBOX, | |
1609 | .prot = { | |
1610 | .domain = AF_INET, | |
1611 | .type = SOCK_STREAM, | |
1612 | }, | |
1613 | }; | |
1614 | ||
1615 | /* clang-format off */ | |
1616 | FIXTURE_VARIANT_ADD(port_specific, no_sandbox_with_ipv6) { | |
1617 | /* clang-format on */ | |
1618 | .sandbox = NO_SANDBOX, | |
1619 | .prot = { | |
1620 | .domain = AF_INET6, | |
1621 | .type = SOCK_STREAM, | |
1622 | }, | |
1623 | }; | |
1624 | ||
1625 | /* clang-format off */ | |
1626 | FIXTURE_VARIANT_ADD(port_specific, sandbox_with_ipv6) { | |
1627 | /* clang-format on */ | |
1628 | .sandbox = TCP_SANDBOX, | |
1629 | .prot = { | |
1630 | .domain = AF_INET6, | |
1631 | .type = SOCK_STREAM, | |
1632 | }, | |
1633 | }; | |
1634 | ||
1635 | FIXTURE_SETUP(port_specific) | |
1636 | { | |
1637 | disable_caps(_metadata); | |
1638 | ||
1639 | ASSERT_EQ(0, set_service(&self->srv0, variant->prot, 0)); | |
1640 | ||
1641 | setup_loopback(_metadata); | |
1642 | }; | |
1643 | ||
1644 | FIXTURE_TEARDOWN(port_specific) | |
1645 | { | |
1646 | } | |
1647 | ||
1648 | TEST_F(port_specific, bind_connect_zero) | |
1649 | { | |
1650 | int bind_fd, connect_fd, ret; | |
1651 | uint16_t port; | |
1652 | ||
1653 | /* Adds a rule layer with bind and connect actions. */ | |
1654 | if (variant->sandbox == TCP_SANDBOX) { | |
1655 | const struct landlock_ruleset_attr ruleset_attr = { | |
1656 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1657 | LANDLOCK_ACCESS_NET_CONNECT_TCP | |
1658 | }; | |
1659 | const struct landlock_net_port_attr tcp_bind_connect_zero = { | |
1660 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1661 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1662 | .port = 0, | |
1663 | }; | |
1664 | int ruleset_fd; | |
1665 | ||
1666 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
1667 | sizeof(ruleset_attr), 0); | |
1668 | ASSERT_LE(0, ruleset_fd); | |
1669 | ||
1670 | /* Checks zero port value on bind and connect actions. */ | |
1671 | EXPECT_EQ(0, | |
1672 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1673 | &tcp_bind_connect_zero, 0)); | |
1674 | ||
1675 | enforce_ruleset(_metadata, ruleset_fd); | |
1676 | EXPECT_EQ(0, close(ruleset_fd)); | |
1677 | } | |
1678 | ||
1679 | bind_fd = socket_variant(&self->srv0); | |
1680 | ASSERT_LE(0, bind_fd); | |
1681 | ||
1682 | connect_fd = socket_variant(&self->srv0); | |
1683 | ASSERT_LE(0, connect_fd); | |
1684 | ||
1685 | /* Sets address port to 0 for both protocol families. */ | |
1686 | set_port(&self->srv0, 0); | |
1687 | /* | |
1688 | * Binds on port 0, which selects a random port within | |
1689 | * ip_local_port_range. | |
1690 | */ | |
1691 | ret = bind_variant(bind_fd, &self->srv0); | |
1692 | EXPECT_EQ(0, ret); | |
1693 | ||
1694 | EXPECT_EQ(0, listen(bind_fd, backlog)); | |
1695 | ||
1696 | /* Connects on port 0. */ | |
1697 | ret = connect_variant(connect_fd, &self->srv0); | |
1698 | EXPECT_EQ(-ECONNREFUSED, ret); | |
1699 | ||
1700 | /* Sets binded port for both protocol families. */ | |
1701 | port = get_binded_port(bind_fd, &variant->prot); | |
1702 | EXPECT_NE(0, port); | |
1703 | set_port(&self->srv0, port); | |
1704 | /* Connects on the binded port. */ | |
1705 | ret = connect_variant(connect_fd, &self->srv0); | |
1706 | if (is_restricted(&variant->prot, variant->sandbox)) { | |
1707 | /* Denied by Landlock. */ | |
1708 | EXPECT_EQ(-EACCES, ret); | |
1709 | } else { | |
1710 | EXPECT_EQ(0, ret); | |
1711 | } | |
1712 | ||
1713 | EXPECT_EQ(0, close(connect_fd)); | |
1714 | EXPECT_EQ(0, close(bind_fd)); | |
1715 | } | |
1716 | ||
1717 | TEST_F(port_specific, bind_connect_1023) | |
1718 | { | |
1719 | int bind_fd, connect_fd, ret; | |
1720 | ||
1721 | /* Adds a rule layer with bind and connect actions. */ | |
1722 | if (variant->sandbox == TCP_SANDBOX) { | |
1723 | const struct landlock_ruleset_attr ruleset_attr = { | |
1724 | .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1725 | LANDLOCK_ACCESS_NET_CONNECT_TCP | |
1726 | }; | |
1727 | /* A rule with port value less than 1024. */ | |
1728 | const struct landlock_net_port_attr tcp_bind_connect_low_range = { | |
1729 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1730 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1731 | .port = 1023, | |
1732 | }; | |
1733 | /* A rule with 1024 port. */ | |
1734 | const struct landlock_net_port_attr tcp_bind_connect = { | |
1735 | .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | | |
1736 | LANDLOCK_ACCESS_NET_CONNECT_TCP, | |
1737 | .port = 1024, | |
1738 | }; | |
1739 | int ruleset_fd; | |
1740 | ||
1741 | ruleset_fd = landlock_create_ruleset(&ruleset_attr, | |
1742 | sizeof(ruleset_attr), 0); | |
1743 | ASSERT_LE(0, ruleset_fd); | |
1744 | ||
1745 | ASSERT_EQ(0, | |
1746 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1747 | &tcp_bind_connect_low_range, 0)); | |
1748 | ASSERT_EQ(0, | |
1749 | landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, | |
1750 | &tcp_bind_connect, 0)); | |
1751 | ||
1752 | enforce_ruleset(_metadata, ruleset_fd); | |
1753 | EXPECT_EQ(0, close(ruleset_fd)); | |
1754 | } | |
1755 | ||
1756 | bind_fd = socket_variant(&self->srv0); | |
1757 | ASSERT_LE(0, bind_fd); | |
1758 | ||
1759 | connect_fd = socket_variant(&self->srv0); | |
1760 | ASSERT_LE(0, connect_fd); | |
1761 | ||
1762 | /* Sets address port to 1023 for both protocol families. */ | |
1763 | set_port(&self->srv0, 1023); | |
1764 | /* Binds on port 1023. */ | |
1765 | ret = bind_variant(bind_fd, &self->srv0); | |
1766 | /* Denied by the system. */ | |
1767 | EXPECT_EQ(-EACCES, ret); | |
1768 | ||
1769 | /* Binds on port 1023. */ | |
1770 | set_cap(_metadata, CAP_NET_BIND_SERVICE); | |
1771 | ret = bind_variant(bind_fd, &self->srv0); | |
1772 | clear_cap(_metadata, CAP_NET_BIND_SERVICE); | |
1773 | EXPECT_EQ(0, ret); | |
1774 | EXPECT_EQ(0, listen(bind_fd, backlog)); | |
1775 | ||
1776 | /* Connects on the binded port 1023. */ | |
1777 | ret = connect_variant(connect_fd, &self->srv0); | |
1778 | EXPECT_EQ(0, ret); | |
1779 | ||
1780 | EXPECT_EQ(0, close(connect_fd)); | |
1781 | EXPECT_EQ(0, close(bind_fd)); | |
1782 | ||
1783 | bind_fd = socket_variant(&self->srv0); | |
1784 | ASSERT_LE(0, bind_fd); | |
1785 | ||
1786 | connect_fd = socket_variant(&self->srv0); | |
1787 | ASSERT_LE(0, connect_fd); | |
1788 | ||
1789 | /* Sets address port to 1024 for both protocol families. */ | |
1790 | set_port(&self->srv0, 1024); | |
1791 | /* Binds on port 1024. */ | |
1792 | ret = bind_variant(bind_fd, &self->srv0); | |
1793 | EXPECT_EQ(0, ret); | |
1794 | EXPECT_EQ(0, listen(bind_fd, backlog)); | |
1795 | ||
1796 | /* Connects on the binded port 1024. */ | |
1797 | ret = connect_variant(connect_fd, &self->srv0); | |
1798 | EXPECT_EQ(0, ret); | |
1799 | ||
1800 | EXPECT_EQ(0, close(connect_fd)); | |
1801 | EXPECT_EQ(0, close(bind_fd)); | |
1802 | } | |
1803 | ||
1804 | TEST_HARNESS_MAIN |