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10#include <endian.h>
11#include <asm/types.h>
12#include <linux/types.h>
13#include <stdint.h>
14#include <stdio.h>
15#include <stdlib.h>
16#include <unistd.h>
17#include <errno.h>
18#include <string.h>
19#include <stddef.h>
20#include <stdbool.h>
21#include <sched.h>
22#include <limits.h>
23#include <assert.h>
24
25#include <sys/capability.h>
26
27#include <linux/unistd.h>
28#include <linux/filter.h>
29#include <linux/bpf_perf_event.h>
30#include <linux/bpf.h>
31#include <linux/if_ether.h>
32#include <linux/btf.h>
33
34#include <bpf/bpf.h>
35#include <bpf/libbpf.h>
36
37#ifdef HAVE_GENHDR
38# include "autoconf.h"
39#else
40# if defined(__i386) || defined(__x86_64) || defined(__s390x__) || defined(__aarch64__)
41# define CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 1
42# endif
43#endif
44#include "bpf_rlimit.h"
45#include "bpf_rand.h"
46#include "bpf_util.h"
47#include "test_btf.h"
48#include "../../../include/linux/filter.h"
49
50#define MAX_INSNS BPF_MAXINSNS
51#define MAX_TEST_INSNS 1000000
52#define MAX_FIXUPS 8
53#define MAX_NR_MAPS 20
54#define MAX_TEST_RUNS 8
55#define POINTER_VALUE 0xcafe4all
56#define TEST_DATA_LEN 64
57
58#define F_NEEDS_EFFICIENT_UNALIGNED_ACCESS (1 << 0)
59#define F_LOAD_WITH_STRICT_ALIGNMENT (1 << 1)
60
61#define UNPRIV_SYSCTL "kernel/unprivileged_bpf_disabled"
62static bool unpriv_disabled = false;
63static int skips;
64static bool verbose = false;
65
66struct bpf_test {
67 const char *descr;
68 struct bpf_insn insns[MAX_INSNS];
69 struct bpf_insn *fill_insns;
70 int fixup_map_hash_8b[MAX_FIXUPS];
71 int fixup_map_hash_48b[MAX_FIXUPS];
72 int fixup_map_hash_16b[MAX_FIXUPS];
73 int fixup_map_array_48b[MAX_FIXUPS];
74 int fixup_map_sockmap[MAX_FIXUPS];
75 int fixup_map_sockhash[MAX_FIXUPS];
76 int fixup_map_xskmap[MAX_FIXUPS];
77 int fixup_map_stacktrace[MAX_FIXUPS];
78 int fixup_prog1[MAX_FIXUPS];
79 int fixup_prog2[MAX_FIXUPS];
80 int fixup_map_in_map[MAX_FIXUPS];
81 int fixup_cgroup_storage[MAX_FIXUPS];
82 int fixup_percpu_cgroup_storage[MAX_FIXUPS];
83 int fixup_map_spin_lock[MAX_FIXUPS];
84 int fixup_map_array_ro[MAX_FIXUPS];
85 int fixup_map_array_wo[MAX_FIXUPS];
86 int fixup_map_array_small[MAX_FIXUPS];
87 int fixup_sk_storage_map[MAX_FIXUPS];
88 int fixup_map_event_output[MAX_FIXUPS];
89 int fixup_map_reuseport_array[MAX_FIXUPS];
90 const char *errstr;
91 const char *errstr_unpriv;
92 uint32_t insn_processed;
93 int prog_len;
94 enum {
95 UNDEF,
96 ACCEPT,
97 REJECT,
98 VERBOSE_ACCEPT,
99 } result, result_unpriv;
100 enum bpf_prog_type prog_type;
101 uint8_t flags;
102 void (*fill_helper)(struct bpf_test *self);
103 uint8_t runs;
104#define bpf_testdata_struct_t \
105 struct { \
106 uint32_t retval, retval_unpriv; \
107 union { \
108 __u8 data[TEST_DATA_LEN]; \
109 __u64 data64[TEST_DATA_LEN / 8]; \
110 }; \
111 }
112 union {
113 bpf_testdata_struct_t;
114 bpf_testdata_struct_t retvals[MAX_TEST_RUNS];
115 };
116 enum bpf_attach_type expected_attach_type;
117 const char *kfunc;
118};
119
120
121
122
123#define MAX_ENTRIES 11
124
125struct test_val {
126 unsigned int index;
127 int foo[MAX_ENTRIES];
128};
129
130struct other_val {
131 long long foo;
132 long long bar;
133};
134
135static void bpf_fill_ld_abs_vlan_push_pop(struct bpf_test *self)
136{
137
138#define PUSH_CNT 51
139
140 unsigned int len = (1 << 15) - PUSH_CNT * 2 * 5 * 6;
141 struct bpf_insn *insn = self->fill_insns;
142 int i = 0, j, k = 0;
143
144 insn[i++] = BPF_MOV64_REG(BPF_REG_6, BPF_REG_1);
145loop:
146 for (j = 0; j < PUSH_CNT; j++) {
147 insn[i++] = BPF_LD_ABS(BPF_B, 0);
148
149 insn[i] = BPF_JMP32_IMM(BPF_JNE, BPF_REG_0, 0x34, len - i - 3);
150 i++;
151 insn[i++] = BPF_MOV64_REG(BPF_REG_1, BPF_REG_6);
152 insn[i++] = BPF_MOV64_IMM(BPF_REG_2, 1);
153 insn[i++] = BPF_MOV64_IMM(BPF_REG_3, 2);
154 insn[i++] = BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
155 BPF_FUNC_skb_vlan_push),
156 insn[i] = BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, len - i - 3);
157 i++;
158 }
159
160 for (j = 0; j < PUSH_CNT; j++) {
161 insn[i++] = BPF_LD_ABS(BPF_B, 0);
162 insn[i] = BPF_JMP32_IMM(BPF_JNE, BPF_REG_0, 0x34, len - i - 3);
163 i++;
164 insn[i++] = BPF_MOV64_REG(BPF_REG_1, BPF_REG_6);
165 insn[i++] = BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
166 BPF_FUNC_skb_vlan_pop),
167 insn[i] = BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, len - i - 3);
168 i++;
169 }
170 if (++k < 5)
171 goto loop;
172
173 for (; i < len - 3; i++)
174 insn[i] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0xbef);
175 insn[len - 3] = BPF_JMP_A(1);
176
177 insn[len - 2] = BPF_MOV32_IMM(BPF_REG_0, 0);
178 insn[len - 1] = BPF_EXIT_INSN();
179 self->prog_len = len;
180}
181
182static void bpf_fill_jump_around_ld_abs(struct bpf_test *self)
183{
184 struct bpf_insn *insn = self->fill_insns;
185
186
187
188
189
190
191 unsigned int len = (1 << 15) / 7;
192 int i = 0;
193
194 insn[i++] = BPF_MOV64_REG(BPF_REG_6, BPF_REG_1);
195 insn[i++] = BPF_LD_ABS(BPF_B, 0);
196 insn[i] = BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 10, len - i - 2);
197 i++;
198 while (i < len - 1)
199 insn[i++] = BPF_LD_ABS(BPF_B, 1);
200 insn[i] = BPF_EXIT_INSN();
201 self->prog_len = i + 1;
202}
203
204static void bpf_fill_rand_ld_dw(struct bpf_test *self)
205{
206 struct bpf_insn *insn = self->fill_insns;
207 uint64_t res = 0;
208 int i = 0;
209
210 insn[i++] = BPF_MOV32_IMM(BPF_REG_0, 0);
211 while (i < self->retval) {
212 uint64_t val = bpf_semi_rand_get();
213 struct bpf_insn tmp[2] = { BPF_LD_IMM64(BPF_REG_1, val) };
214
215 res ^= val;
216 insn[i++] = tmp[0];
217 insn[i++] = tmp[1];
218 insn[i++] = BPF_ALU64_REG(BPF_XOR, BPF_REG_0, BPF_REG_1);
219 }
220 insn[i++] = BPF_MOV64_REG(BPF_REG_1, BPF_REG_0);
221 insn[i++] = BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 32);
222 insn[i++] = BPF_ALU64_REG(BPF_XOR, BPF_REG_0, BPF_REG_1);
223 insn[i] = BPF_EXIT_INSN();
224 self->prog_len = i + 1;
225 res ^= (res >> 32);
226 self->retval = (uint32_t)res;
227}
228
229#define MAX_JMP_SEQ 8192
230
231
232static void bpf_fill_scale1(struct bpf_test *self)
233{
234 struct bpf_insn *insn = self->fill_insns;
235 int i = 0, k = 0;
236
237 insn[i++] = BPF_MOV64_REG(BPF_REG_6, BPF_REG_1);
238
239 while (k++ < MAX_JMP_SEQ) {
240 insn[i++] = BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
241 BPF_FUNC_get_prandom_u32);
242 insn[i++] = BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, bpf_semi_rand_get(), 2);
243 insn[i++] = BPF_MOV64_REG(BPF_REG_1, BPF_REG_10);
244 insn[i++] = BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6,
245 -8 * (k % 64 + 1));
246 }
247
248
249
250 while (i < MAX_TEST_INSNS - MAX_JMP_SEQ * 4)
251 insn[i++] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 42);
252 insn[i] = BPF_EXIT_INSN();
253 self->prog_len = i + 1;
254 self->retval = 42;
255}
256
257
258static void bpf_fill_scale2(struct bpf_test *self)
259{
260 struct bpf_insn *insn = self->fill_insns;
261 int i = 0, k = 0;
262
263#define FUNC_NEST 7
264 for (k = 0; k < FUNC_NEST; k++) {
265 insn[i++] = BPF_CALL_REL(1);
266 insn[i++] = BPF_EXIT_INSN();
267 }
268 insn[i++] = BPF_MOV64_REG(BPF_REG_6, BPF_REG_1);
269
270 k = 0;
271 while (k++ < MAX_JMP_SEQ) {
272 insn[i++] = BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
273 BPF_FUNC_get_prandom_u32);
274 insn[i++] = BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, bpf_semi_rand_get(), 2);
275 insn[i++] = BPF_MOV64_REG(BPF_REG_1, BPF_REG_10);
276 insn[i++] = BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6,
277 -8 * (k % (64 - 4 * FUNC_NEST) + 1));
278 }
279 while (i < MAX_TEST_INSNS - MAX_JMP_SEQ * 4)
280 insn[i++] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 42);
281 insn[i] = BPF_EXIT_INSN();
282 self->prog_len = i + 1;
283 self->retval = 42;
284}
285
286static void bpf_fill_scale(struct bpf_test *self)
287{
288 switch (self->retval) {
289 case 1:
290 return bpf_fill_scale1(self);
291 case 2:
292 return bpf_fill_scale2(self);
293 default:
294 self->prog_len = 0;
295 break;
296 }
297}
298
299
300#define BPF_SK_LOOKUP(func) \
301 \
302 BPF_MOV64_IMM(BPF_REG_2, 0), \
303 BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_2, -8), \
304 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -16), \
305 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -24), \
306 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -32), \
307 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -40), \
308 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -48), \
309 \
310 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), \
311 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -48), \
312 BPF_MOV64_IMM(BPF_REG_3, sizeof(struct bpf_sock_tuple)), \
313 BPF_MOV64_IMM(BPF_REG_4, 0), \
314 BPF_MOV64_IMM(BPF_REG_5, 0), \
315 BPF_EMIT_CALL(BPF_FUNC_ ## func)
316
317
318
319
320
321#define BPF_DIRECT_PKT_R2 \
322 BPF_MOV64_IMM(BPF_REG_0, 0), \
323 BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, \
324 offsetof(struct __sk_buff, data)), \
325 BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, \
326 offsetof(struct __sk_buff, data_end)), \
327 BPF_MOV64_REG(BPF_REG_4, BPF_REG_2), \
328 BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 8), \
329 BPF_JMP_REG(BPF_JLE, BPF_REG_4, BPF_REG_3, 1), \
330 BPF_EXIT_INSN()
331
332
333
334
335#define BPF_RAND_UEXT_R7 \
336 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, \
337 BPF_FUNC_get_prandom_u32), \
338 BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), \
339 BPF_ALU64_IMM(BPF_LSH, BPF_REG_7, 33), \
340 BPF_ALU64_IMM(BPF_RSH, BPF_REG_7, 33)
341
342
343
344
345#define BPF_RAND_SEXT_R7 \
346 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, \
347 BPF_FUNC_get_prandom_u32), \
348 BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), \
349 BPF_ALU64_IMM(BPF_OR, BPF_REG_7, 0x80000000), \
350 BPF_ALU64_IMM(BPF_LSH, BPF_REG_7, 32), \
351 BPF_ALU64_IMM(BPF_ARSH, BPF_REG_7, 32)
352
353static struct bpf_test tests[] = {
354#define FILL_ARRAY
355#include <verifier/tests.h>
356#undef FILL_ARRAY
357};
358
359static int probe_filter_length(const struct bpf_insn *fp)
360{
361 int len;
362
363 for (len = MAX_INSNS - 1; len > 0; --len)
364 if (fp[len].code != 0 || fp[len].imm != 0)
365 break;
366 return len + 1;
367}
368
369static bool skip_unsupported_map(enum bpf_map_type map_type)
370{
371 if (!bpf_probe_map_type(map_type, 0)) {
372 printf("SKIP (unsupported map type %d)\n", map_type);
373 skips++;
374 return true;
375 }
376 return false;
377}
378
379static int __create_map(uint32_t type, uint32_t size_key,
380 uint32_t size_value, uint32_t max_elem,
381 uint32_t extra_flags)
382{
383 int fd;
384
385 fd = bpf_create_map(type, size_key, size_value, max_elem,
386 (type == BPF_MAP_TYPE_HASH ?
387 BPF_F_NO_PREALLOC : 0) | extra_flags);
388 if (fd < 0) {
389 if (skip_unsupported_map(type))
390 return -1;
391 printf("Failed to create hash map '%s'!\n", strerror(errno));
392 }
393
394 return fd;
395}
396
397static int create_map(uint32_t type, uint32_t size_key,
398 uint32_t size_value, uint32_t max_elem)
399{
400 return __create_map(type, size_key, size_value, max_elem, 0);
401}
402
403static void update_map(int fd, int index)
404{
405 struct test_val value = {
406 .index = (6 + 1) * sizeof(int),
407 .foo[6] = 0xabcdef12,
408 };
409
410 assert(!bpf_map_update_elem(fd, &index, &value, 0));
411}
412
413static int create_prog_dummy_simple(enum bpf_prog_type prog_type, int ret)
414{
415 struct bpf_insn prog[] = {
416 BPF_MOV64_IMM(BPF_REG_0, ret),
417 BPF_EXIT_INSN(),
418 };
419
420 return bpf_load_program(prog_type, prog,
421 ARRAY_SIZE(prog), "GPL", 0, NULL, 0);
422}
423
424static int create_prog_dummy_loop(enum bpf_prog_type prog_type, int mfd,
425 int idx, int ret)
426{
427 struct bpf_insn prog[] = {
428 BPF_MOV64_IMM(BPF_REG_3, idx),
429 BPF_LD_MAP_FD(BPF_REG_2, mfd),
430 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
431 BPF_FUNC_tail_call),
432 BPF_MOV64_IMM(BPF_REG_0, ret),
433 BPF_EXIT_INSN(),
434 };
435
436 return bpf_load_program(prog_type, prog,
437 ARRAY_SIZE(prog), "GPL", 0, NULL, 0);
438}
439
440static int create_prog_array(enum bpf_prog_type prog_type, uint32_t max_elem,
441 int p1key, int p2key, int p3key)
442{
443 int mfd, p1fd, p2fd, p3fd;
444
445 mfd = bpf_create_map(BPF_MAP_TYPE_PROG_ARRAY, sizeof(int),
446 sizeof(int), max_elem, 0);
447 if (mfd < 0) {
448 if (skip_unsupported_map(BPF_MAP_TYPE_PROG_ARRAY))
449 return -1;
450 printf("Failed to create prog array '%s'!\n", strerror(errno));
451 return -1;
452 }
453
454 p1fd = create_prog_dummy_simple(prog_type, 42);
455 p2fd = create_prog_dummy_loop(prog_type, mfd, p2key, 41);
456 p3fd = create_prog_dummy_simple(prog_type, 24);
457 if (p1fd < 0 || p2fd < 0 || p3fd < 0)
458 goto err;
459 if (bpf_map_update_elem(mfd, &p1key, &p1fd, BPF_ANY) < 0)
460 goto err;
461 if (bpf_map_update_elem(mfd, &p2key, &p2fd, BPF_ANY) < 0)
462 goto err;
463 if (bpf_map_update_elem(mfd, &p3key, &p3fd, BPF_ANY) < 0) {
464err:
465 close(mfd);
466 mfd = -1;
467 }
468 close(p3fd);
469 close(p2fd);
470 close(p1fd);
471 return mfd;
472}
473
474static int create_map_in_map(void)
475{
476 int inner_map_fd, outer_map_fd;
477
478 inner_map_fd = bpf_create_map(BPF_MAP_TYPE_ARRAY, sizeof(int),
479 sizeof(int), 1, 0);
480 if (inner_map_fd < 0) {
481 if (skip_unsupported_map(BPF_MAP_TYPE_ARRAY))
482 return -1;
483 printf("Failed to create array '%s'!\n", strerror(errno));
484 return inner_map_fd;
485 }
486
487 outer_map_fd = bpf_create_map_in_map(BPF_MAP_TYPE_ARRAY_OF_MAPS, NULL,
488 sizeof(int), inner_map_fd, 1, 0);
489 if (outer_map_fd < 0) {
490 if (skip_unsupported_map(BPF_MAP_TYPE_ARRAY_OF_MAPS))
491 return -1;
492 printf("Failed to create array of maps '%s'!\n",
493 strerror(errno));
494 }
495
496 close(inner_map_fd);
497
498 return outer_map_fd;
499}
500
501static int create_cgroup_storage(bool percpu)
502{
503 enum bpf_map_type type = percpu ? BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE :
504 BPF_MAP_TYPE_CGROUP_STORAGE;
505 int fd;
506
507 fd = bpf_create_map(type, sizeof(struct bpf_cgroup_storage_key),
508 TEST_DATA_LEN, 0, 0);
509 if (fd < 0) {
510 if (skip_unsupported_map(type))
511 return -1;
512 printf("Failed to create cgroup storage '%s'!\n",
513 strerror(errno));
514 }
515
516 return fd;
517}
518
519
520
521
522
523
524
525
526
527static const char btf_str_sec[] = "\0bpf_spin_lock\0val\0cnt\0l";
528static __u32 btf_raw_types[] = {
529
530 BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
531
532 BTF_TYPE_ENC(1, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 4),
533 BTF_MEMBER_ENC(15, 1, 0),
534
535 BTF_TYPE_ENC(15, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 8),
536 BTF_MEMBER_ENC(19, 1, 0),
537 BTF_MEMBER_ENC(23, 2, 32),
538};
539
540static int load_btf(void)
541{
542 struct btf_header hdr = {
543 .magic = BTF_MAGIC,
544 .version = BTF_VERSION,
545 .hdr_len = sizeof(struct btf_header),
546 .type_len = sizeof(btf_raw_types),
547 .str_off = sizeof(btf_raw_types),
548 .str_len = sizeof(btf_str_sec),
549 };
550 void *ptr, *raw_btf;
551 int btf_fd;
552
553 ptr = raw_btf = malloc(sizeof(hdr) + sizeof(btf_raw_types) +
554 sizeof(btf_str_sec));
555
556 memcpy(ptr, &hdr, sizeof(hdr));
557 ptr += sizeof(hdr);
558 memcpy(ptr, btf_raw_types, hdr.type_len);
559 ptr += hdr.type_len;
560 memcpy(ptr, btf_str_sec, hdr.str_len);
561 ptr += hdr.str_len;
562
563 btf_fd = bpf_load_btf(raw_btf, ptr - raw_btf, 0, 0, 0);
564 free(raw_btf);
565 if (btf_fd < 0)
566 return -1;
567 return btf_fd;
568}
569
570static int create_map_spin_lock(void)
571{
572 struct bpf_create_map_attr attr = {
573 .name = "test_map",
574 .map_type = BPF_MAP_TYPE_ARRAY,
575 .key_size = 4,
576 .value_size = 8,
577 .max_entries = 1,
578 .btf_key_type_id = 1,
579 .btf_value_type_id = 3,
580 };
581 int fd, btf_fd;
582
583 btf_fd = load_btf();
584 if (btf_fd < 0)
585 return -1;
586 attr.btf_fd = btf_fd;
587 fd = bpf_create_map_xattr(&attr);
588 if (fd < 0)
589 printf("Failed to create map with spin_lock\n");
590 return fd;
591}
592
593static int create_sk_storage_map(void)
594{
595 struct bpf_create_map_attr attr = {
596 .name = "test_map",
597 .map_type = BPF_MAP_TYPE_SK_STORAGE,
598 .key_size = 4,
599 .value_size = 8,
600 .max_entries = 0,
601 .map_flags = BPF_F_NO_PREALLOC,
602 .btf_key_type_id = 1,
603 .btf_value_type_id = 3,
604 };
605 int fd, btf_fd;
606
607 btf_fd = load_btf();
608 if (btf_fd < 0)
609 return -1;
610 attr.btf_fd = btf_fd;
611 fd = bpf_create_map_xattr(&attr);
612 close(attr.btf_fd);
613 if (fd < 0)
614 printf("Failed to create sk_storage_map\n");
615 return fd;
616}
617
618static char bpf_vlog[UINT_MAX >> 8];
619
620static void do_test_fixup(struct bpf_test *test, enum bpf_prog_type prog_type,
621 struct bpf_insn *prog, int *map_fds)
622{
623 int *fixup_map_hash_8b = test->fixup_map_hash_8b;
624 int *fixup_map_hash_48b = test->fixup_map_hash_48b;
625 int *fixup_map_hash_16b = test->fixup_map_hash_16b;
626 int *fixup_map_array_48b = test->fixup_map_array_48b;
627 int *fixup_map_sockmap = test->fixup_map_sockmap;
628 int *fixup_map_sockhash = test->fixup_map_sockhash;
629 int *fixup_map_xskmap = test->fixup_map_xskmap;
630 int *fixup_map_stacktrace = test->fixup_map_stacktrace;
631 int *fixup_prog1 = test->fixup_prog1;
632 int *fixup_prog2 = test->fixup_prog2;
633 int *fixup_map_in_map = test->fixup_map_in_map;
634 int *fixup_cgroup_storage = test->fixup_cgroup_storage;
635 int *fixup_percpu_cgroup_storage = test->fixup_percpu_cgroup_storage;
636 int *fixup_map_spin_lock = test->fixup_map_spin_lock;
637 int *fixup_map_array_ro = test->fixup_map_array_ro;
638 int *fixup_map_array_wo = test->fixup_map_array_wo;
639 int *fixup_map_array_small = test->fixup_map_array_small;
640 int *fixup_sk_storage_map = test->fixup_sk_storage_map;
641 int *fixup_map_event_output = test->fixup_map_event_output;
642 int *fixup_map_reuseport_array = test->fixup_map_reuseport_array;
643
644 if (test->fill_helper) {
645 test->fill_insns = calloc(MAX_TEST_INSNS, sizeof(struct bpf_insn));
646 test->fill_helper(test);
647 }
648
649
650
651
652
653 if (*fixup_map_hash_8b) {
654 map_fds[0] = create_map(BPF_MAP_TYPE_HASH, sizeof(long long),
655 sizeof(long long), 1);
656 do {
657 prog[*fixup_map_hash_8b].imm = map_fds[0];
658 fixup_map_hash_8b++;
659 } while (*fixup_map_hash_8b);
660 }
661
662 if (*fixup_map_hash_48b) {
663 map_fds[1] = create_map(BPF_MAP_TYPE_HASH, sizeof(long long),
664 sizeof(struct test_val), 1);
665 do {
666 prog[*fixup_map_hash_48b].imm = map_fds[1];
667 fixup_map_hash_48b++;
668 } while (*fixup_map_hash_48b);
669 }
670
671 if (*fixup_map_hash_16b) {
672 map_fds[2] = create_map(BPF_MAP_TYPE_HASH, sizeof(long long),
673 sizeof(struct other_val), 1);
674 do {
675 prog[*fixup_map_hash_16b].imm = map_fds[2];
676 fixup_map_hash_16b++;
677 } while (*fixup_map_hash_16b);
678 }
679
680 if (*fixup_map_array_48b) {
681 map_fds[3] = create_map(BPF_MAP_TYPE_ARRAY, sizeof(int),
682 sizeof(struct test_val), 1);
683 update_map(map_fds[3], 0);
684 do {
685 prog[*fixup_map_array_48b].imm = map_fds[3];
686 fixup_map_array_48b++;
687 } while (*fixup_map_array_48b);
688 }
689
690 if (*fixup_prog1) {
691 map_fds[4] = create_prog_array(prog_type, 4, 0, 1, 2);
692 do {
693 prog[*fixup_prog1].imm = map_fds[4];
694 fixup_prog1++;
695 } while (*fixup_prog1);
696 }
697
698 if (*fixup_prog2) {
699 map_fds[5] = create_prog_array(prog_type, 8, 7, 1, 2);
700 do {
701 prog[*fixup_prog2].imm = map_fds[5];
702 fixup_prog2++;
703 } while (*fixup_prog2);
704 }
705
706 if (*fixup_map_in_map) {
707 map_fds[6] = create_map_in_map();
708 do {
709 prog[*fixup_map_in_map].imm = map_fds[6];
710 fixup_map_in_map++;
711 } while (*fixup_map_in_map);
712 }
713
714 if (*fixup_cgroup_storage) {
715 map_fds[7] = create_cgroup_storage(false);
716 do {
717 prog[*fixup_cgroup_storage].imm = map_fds[7];
718 fixup_cgroup_storage++;
719 } while (*fixup_cgroup_storage);
720 }
721
722 if (*fixup_percpu_cgroup_storage) {
723 map_fds[8] = create_cgroup_storage(true);
724 do {
725 prog[*fixup_percpu_cgroup_storage].imm = map_fds[8];
726 fixup_percpu_cgroup_storage++;
727 } while (*fixup_percpu_cgroup_storage);
728 }
729 if (*fixup_map_sockmap) {
730 map_fds[9] = create_map(BPF_MAP_TYPE_SOCKMAP, sizeof(int),
731 sizeof(int), 1);
732 do {
733 prog[*fixup_map_sockmap].imm = map_fds[9];
734 fixup_map_sockmap++;
735 } while (*fixup_map_sockmap);
736 }
737 if (*fixup_map_sockhash) {
738 map_fds[10] = create_map(BPF_MAP_TYPE_SOCKHASH, sizeof(int),
739 sizeof(int), 1);
740 do {
741 prog[*fixup_map_sockhash].imm = map_fds[10];
742 fixup_map_sockhash++;
743 } while (*fixup_map_sockhash);
744 }
745 if (*fixup_map_xskmap) {
746 map_fds[11] = create_map(BPF_MAP_TYPE_XSKMAP, sizeof(int),
747 sizeof(int), 1);
748 do {
749 prog[*fixup_map_xskmap].imm = map_fds[11];
750 fixup_map_xskmap++;
751 } while (*fixup_map_xskmap);
752 }
753 if (*fixup_map_stacktrace) {
754 map_fds[12] = create_map(BPF_MAP_TYPE_STACK_TRACE, sizeof(u32),
755 sizeof(u64), 1);
756 do {
757 prog[*fixup_map_stacktrace].imm = map_fds[12];
758 fixup_map_stacktrace++;
759 } while (*fixup_map_stacktrace);
760 }
761 if (*fixup_map_spin_lock) {
762 map_fds[13] = create_map_spin_lock();
763 do {
764 prog[*fixup_map_spin_lock].imm = map_fds[13];
765 fixup_map_spin_lock++;
766 } while (*fixup_map_spin_lock);
767 }
768 if (*fixup_map_array_ro) {
769 map_fds[14] = __create_map(BPF_MAP_TYPE_ARRAY, sizeof(int),
770 sizeof(struct test_val), 1,
771 BPF_F_RDONLY_PROG);
772 update_map(map_fds[14], 0);
773 do {
774 prog[*fixup_map_array_ro].imm = map_fds[14];
775 fixup_map_array_ro++;
776 } while (*fixup_map_array_ro);
777 }
778 if (*fixup_map_array_wo) {
779 map_fds[15] = __create_map(BPF_MAP_TYPE_ARRAY, sizeof(int),
780 sizeof(struct test_val), 1,
781 BPF_F_WRONLY_PROG);
782 update_map(map_fds[15], 0);
783 do {
784 prog[*fixup_map_array_wo].imm = map_fds[15];
785 fixup_map_array_wo++;
786 } while (*fixup_map_array_wo);
787 }
788 if (*fixup_map_array_small) {
789 map_fds[16] = __create_map(BPF_MAP_TYPE_ARRAY, sizeof(int),
790 1, 1, 0);
791 update_map(map_fds[16], 0);
792 do {
793 prog[*fixup_map_array_small].imm = map_fds[16];
794 fixup_map_array_small++;
795 } while (*fixup_map_array_small);
796 }
797 if (*fixup_sk_storage_map) {
798 map_fds[17] = create_sk_storage_map();
799 do {
800 prog[*fixup_sk_storage_map].imm = map_fds[17];
801 fixup_sk_storage_map++;
802 } while (*fixup_sk_storage_map);
803 }
804 if (*fixup_map_event_output) {
805 map_fds[18] = __create_map(BPF_MAP_TYPE_PERF_EVENT_ARRAY,
806 sizeof(int), sizeof(int), 1, 0);
807 do {
808 prog[*fixup_map_event_output].imm = map_fds[18];
809 fixup_map_event_output++;
810 } while (*fixup_map_event_output);
811 }
812 if (*fixup_map_reuseport_array) {
813 map_fds[19] = __create_map(BPF_MAP_TYPE_REUSEPORT_SOCKARRAY,
814 sizeof(u32), sizeof(u64), 1, 0);
815 do {
816 prog[*fixup_map_reuseport_array].imm = map_fds[19];
817 fixup_map_reuseport_array++;
818 } while (*fixup_map_reuseport_array);
819 }
820}
821
822struct libcap {
823 struct __user_cap_header_struct hdr;
824 struct __user_cap_data_struct data[2];
825};
826
827static int set_admin(bool admin)
828{
829 cap_t caps;
830
831 const cap_value_t cap_net_admin = CAP_NET_ADMIN;
832 const cap_value_t cap_sys_admin = CAP_SYS_ADMIN;
833 struct libcap *cap;
834 int ret = -1;
835
836 caps = cap_get_proc();
837 if (!caps) {
838 perror("cap_get_proc");
839 return -1;
840 }
841 cap = (struct libcap *)caps;
842 if (cap_set_flag(caps, CAP_EFFECTIVE, 1, &cap_sys_admin, CAP_CLEAR)) {
843 perror("cap_set_flag clear admin");
844 goto out;
845 }
846 if (cap_set_flag(caps, CAP_EFFECTIVE, 1, &cap_net_admin,
847 admin ? CAP_SET : CAP_CLEAR)) {
848 perror("cap_set_flag set_or_clear net");
849 goto out;
850 }
851
852
853
854 if (admin) {
855 cap->data[1].effective |= 1 << (38 - 32);
856 cap->data[1].effective |= 1 << (39 - 32);
857 } else {
858 cap->data[1].effective &= ~(1 << (38 - 32));
859 cap->data[1].effective &= ~(1 << (39 - 32));
860 }
861 if (cap_set_proc(caps)) {
862 perror("cap_set_proc");
863 goto out;
864 }
865 ret = 0;
866out:
867 if (cap_free(caps))
868 perror("cap_free");
869 return ret;
870}
871
872static int do_prog_test_run(int fd_prog, bool unpriv, uint32_t expected_val,
873 void *data, size_t size_data)
874{
875 __u8 tmp[TEST_DATA_LEN << 2];
876 __u32 size_tmp = sizeof(tmp);
877 uint32_t retval;
878 int err;
879
880 if (unpriv)
881 set_admin(true);
882 err = bpf_prog_test_run(fd_prog, 1, data, size_data,
883 tmp, &size_tmp, &retval, NULL);
884 if (unpriv)
885 set_admin(false);
886 if (err && errno != 524 && errno != EPERM) {
887 printf("Unexpected bpf_prog_test_run error ");
888 return err;
889 }
890 if (!err && retval != expected_val &&
891 expected_val != POINTER_VALUE) {
892 printf("FAIL retval %d != %d ", retval, expected_val);
893 return 1;
894 }
895
896 return 0;
897}
898
899static bool cmp_str_seq(const char *log, const char *exp)
900{
901 char needle[80];
902 const char *p, *q;
903 int len;
904
905 do {
906 p = strchr(exp, '\t');
907 if (!p)
908 p = exp + strlen(exp);
909
910 len = p - exp;
911 if (len >= sizeof(needle) || !len) {
912 printf("FAIL\nTestcase bug\n");
913 return false;
914 }
915 strncpy(needle, exp, len);
916 needle[len] = 0;
917 q = strstr(log, needle);
918 if (!q) {
919 printf("FAIL\nUnexpected verifier log in successful load!\n"
920 "EXP: %s\nRES:\n", needle);
921 return false;
922 }
923 log = q + len;
924 exp = p + 1;
925 } while (*p);
926 return true;
927}
928
929static void do_test_single(struct bpf_test *test, bool unpriv,
930 int *passes, int *errors)
931{
932 int fd_prog, expected_ret, alignment_prevented_execution;
933 int prog_len, prog_type = test->prog_type;
934 struct bpf_insn *prog = test->insns;
935 struct bpf_load_program_attr attr;
936 int run_errs, run_successes;
937 int map_fds[MAX_NR_MAPS];
938 const char *expected_err;
939 int fixup_skips;
940 __u32 pflags;
941 int i, err;
942
943 for (i = 0; i < MAX_NR_MAPS; i++)
944 map_fds[i] = -1;
945
946 if (!prog_type)
947 prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
948 fixup_skips = skips;
949 do_test_fixup(test, prog_type, prog, map_fds);
950 if (test->fill_insns) {
951 prog = test->fill_insns;
952 prog_len = test->prog_len;
953 } else {
954 prog_len = probe_filter_length(prog);
955 }
956
957
958
959 if (fixup_skips != skips)
960 return;
961
962 pflags = BPF_F_TEST_RND_HI32;
963 if (test->flags & F_LOAD_WITH_STRICT_ALIGNMENT)
964 pflags |= BPF_F_STRICT_ALIGNMENT;
965 if (test->flags & F_NEEDS_EFFICIENT_UNALIGNED_ACCESS)
966 pflags |= BPF_F_ANY_ALIGNMENT;
967 if (test->flags & ~3)
968 pflags |= test->flags;
969
970 expected_ret = unpriv && test->result_unpriv != UNDEF ?
971 test->result_unpriv : test->result;
972 expected_err = unpriv && test->errstr_unpriv ?
973 test->errstr_unpriv : test->errstr;
974 memset(&attr, 0, sizeof(attr));
975 attr.prog_type = prog_type;
976 attr.expected_attach_type = test->expected_attach_type;
977 attr.insns = prog;
978 attr.insns_cnt = prog_len;
979 attr.license = "GPL";
980 if (verbose)
981 attr.log_level = 1;
982 else if (expected_ret == VERBOSE_ACCEPT)
983 attr.log_level = 2;
984 else
985 attr.log_level = 4;
986 attr.prog_flags = pflags;
987
988 if (prog_type == BPF_PROG_TYPE_TRACING && test->kfunc) {
989 attr.attach_btf_id = libbpf_find_vmlinux_btf_id(test->kfunc,
990 attr.expected_attach_type);
991 if (attr.attach_btf_id < 0) {
992 printf("FAIL\nFailed to find BTF ID for '%s'!\n",
993 test->kfunc);
994 (*errors)++;
995 return;
996 }
997 }
998
999 fd_prog = bpf_load_program_xattr(&attr, bpf_vlog, sizeof(bpf_vlog));
1000
1001
1002
1003
1004 if (fd_prog < 0 && prog_type != BPF_PROG_TYPE_TRACING &&
1005 !bpf_probe_prog_type(prog_type, 0)) {
1006 printf("SKIP (unsupported program type %d)\n", prog_type);
1007 skips++;
1008 goto close_fds;
1009 }
1010
1011 alignment_prevented_execution = 0;
1012
1013 if (expected_ret == ACCEPT || expected_ret == VERBOSE_ACCEPT) {
1014 if (fd_prog < 0) {
1015 printf("FAIL\nFailed to load prog '%s'!\n",
1016 strerror(errno));
1017 goto fail_log;
1018 }
1019#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1020 if (fd_prog >= 0 &&
1021 (test->flags & F_NEEDS_EFFICIENT_UNALIGNED_ACCESS))
1022 alignment_prevented_execution = 1;
1023#endif
1024 if (expected_ret == VERBOSE_ACCEPT && !cmp_str_seq(bpf_vlog, expected_err)) {
1025 goto fail_log;
1026 }
1027 } else {
1028 if (fd_prog >= 0) {
1029 printf("FAIL\nUnexpected success to load!\n");
1030 goto fail_log;
1031 }
1032 if (!expected_err || !strstr(bpf_vlog, expected_err)) {
1033 printf("FAIL\nUnexpected error message!\n\tEXP: %s\n\tRES: %s\n",
1034 expected_err, bpf_vlog);
1035 goto fail_log;
1036 }
1037 }
1038
1039 if (test->insn_processed) {
1040 uint32_t insn_processed;
1041 char *proc;
1042
1043 proc = strstr(bpf_vlog, "processed ");
1044 insn_processed = atoi(proc + 10);
1045 if (test->insn_processed != insn_processed) {
1046 printf("FAIL\nUnexpected insn_processed %u vs %u\n",
1047 insn_processed, test->insn_processed);
1048 goto fail_log;
1049 }
1050 }
1051
1052 if (verbose)
1053 printf(", verifier log:\n%s", bpf_vlog);
1054
1055 run_errs = 0;
1056 run_successes = 0;
1057 if (!alignment_prevented_execution && fd_prog >= 0) {
1058 uint32_t expected_val;
1059 int i;
1060
1061 if (!test->runs)
1062 test->runs = 1;
1063
1064 for (i = 0; i < test->runs; i++) {
1065 if (unpriv && test->retvals[i].retval_unpriv)
1066 expected_val = test->retvals[i].retval_unpriv;
1067 else
1068 expected_val = test->retvals[i].retval;
1069
1070 err = do_prog_test_run(fd_prog, unpriv, expected_val,
1071 test->retvals[i].data,
1072 sizeof(test->retvals[i].data));
1073 if (err) {
1074 printf("(run %d/%d) ", i + 1, test->runs);
1075 run_errs++;
1076 } else {
1077 run_successes++;
1078 }
1079 }
1080 }
1081
1082 if (!run_errs) {
1083 (*passes)++;
1084 if (run_successes > 1)
1085 printf("%d cases ", run_successes);
1086 printf("OK");
1087 if (alignment_prevented_execution)
1088 printf(" (NOTE: not executed due to unknown alignment)");
1089 printf("\n");
1090 } else {
1091 printf("\n");
1092 goto fail_log;
1093 }
1094close_fds:
1095 if (test->fill_insns)
1096 free(test->fill_insns);
1097 close(fd_prog);
1098 for (i = 0; i < MAX_NR_MAPS; i++)
1099 close(map_fds[i]);
1100 sched_yield();
1101 return;
1102fail_log:
1103 (*errors)++;
1104 printf("%s", bpf_vlog);
1105 goto close_fds;
1106}
1107
1108static bool is_admin(void)
1109{
1110 cap_flag_value_t net_priv = CAP_CLEAR;
1111 bool perfmon_priv = false;
1112 bool bpf_priv = false;
1113 struct libcap *cap;
1114 cap_t caps;
1115
1116#ifdef CAP_IS_SUPPORTED
1117 if (!CAP_IS_SUPPORTED(CAP_SETFCAP)) {
1118 perror("cap_get_flag");
1119 return false;
1120 }
1121#endif
1122 caps = cap_get_proc();
1123 if (!caps) {
1124 perror("cap_get_proc");
1125 return false;
1126 }
1127 cap = (struct libcap *)caps;
1128 bpf_priv = cap->data[1].effective & (1 << (39 - 32));
1129 perfmon_priv = cap->data[1].effective & (1 << (38 - 32));
1130 if (cap_get_flag(caps, CAP_NET_ADMIN, CAP_EFFECTIVE, &net_priv))
1131 perror("cap_get_flag NET");
1132 if (cap_free(caps))
1133 perror("cap_free");
1134 return bpf_priv && perfmon_priv && net_priv == CAP_SET;
1135}
1136
1137static void get_unpriv_disabled()
1138{
1139 char buf[2];
1140 FILE *fd;
1141
1142 fd = fopen("/proc/sys/"UNPRIV_SYSCTL, "r");
1143 if (!fd) {
1144 perror("fopen /proc/sys/"UNPRIV_SYSCTL);
1145 unpriv_disabled = true;
1146 return;
1147 }
1148 if (fgets(buf, 2, fd) == buf && atoi(buf))
1149 unpriv_disabled = true;
1150 fclose(fd);
1151}
1152
1153static bool test_as_unpriv(struct bpf_test *test)
1154{
1155 return !test->prog_type ||
1156 test->prog_type == BPF_PROG_TYPE_SOCKET_FILTER ||
1157 test->prog_type == BPF_PROG_TYPE_CGROUP_SKB;
1158}
1159
1160static int do_test(bool unpriv, unsigned int from, unsigned int to)
1161{
1162 int i, passes = 0, errors = 0;
1163
1164 for (i = from; i < to; i++) {
1165 struct bpf_test *test = &tests[i];
1166
1167
1168
1169
1170 if (test_as_unpriv(test) && unpriv_disabled) {
1171 printf("#%d/u %s SKIP\n", i, test->descr);
1172 skips++;
1173 } else if (test_as_unpriv(test)) {
1174 if (!unpriv)
1175 set_admin(false);
1176 printf("#%d/u %s ", i, test->descr);
1177 do_test_single(test, true, &passes, &errors);
1178 if (!unpriv)
1179 set_admin(true);
1180 }
1181
1182 if (unpriv) {
1183 printf("#%d/p %s SKIP\n", i, test->descr);
1184 skips++;
1185 } else {
1186 printf("#%d/p %s ", i, test->descr);
1187 do_test_single(test, false, &passes, &errors);
1188 }
1189 }
1190
1191 printf("Summary: %d PASSED, %d SKIPPED, %d FAILED\n", passes,
1192 skips, errors);
1193 return errors ? EXIT_FAILURE : EXIT_SUCCESS;
1194}
1195
1196int main(int argc, char **argv)
1197{
1198 unsigned int from = 0, to = ARRAY_SIZE(tests);
1199 bool unpriv = !is_admin();
1200 int arg = 1;
1201
1202 if (argc > 1 && strcmp(argv[1], "-v") == 0) {
1203 arg++;
1204 verbose = true;
1205 argc--;
1206 }
1207
1208 if (argc == 3) {
1209 unsigned int l = atoi(argv[arg]);
1210 unsigned int u = atoi(argv[arg + 1]);
1211
1212 if (l < to && u < to) {
1213 from = l;
1214 to = u + 1;
1215 }
1216 } else if (argc == 2) {
1217 unsigned int t = atoi(argv[arg]);
1218
1219 if (t < to) {
1220 from = t;
1221 to = t + 1;
1222 }
1223 }
1224
1225 get_unpriv_disabled();
1226 if (unpriv && unpriv_disabled) {
1227 printf("Cannot run as unprivileged user with sysctl %s.\n",
1228 UNPRIV_SYSCTL);
1229 return EXIT_FAILURE;
1230 }
1231
1232 bpf_semi_rand_init();
1233 return do_test(unpriv, from, to);
1234}
1235
