Loading...
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
3#include <test_progs.h>
4#include <bpf/btf.h>
5
6#include "test_log_fixup.skel.h"
7
8enum trunc_type {
9 TRUNC_NONE,
10 TRUNC_PARTIAL,
11 TRUNC_FULL,
12};
13
14static void bad_core_relo(size_t log_buf_size, enum trunc_type trunc_type)
15{
16 char log_buf[8 * 1024];
17 struct test_log_fixup* skel;
18 int err;
19
20 skel = test_log_fixup__open();
21 if (!ASSERT_OK_PTR(skel, "skel_open"))
22 return;
23
24 bpf_program__set_autoload(skel->progs.bad_relo, true);
25 memset(log_buf, 0, sizeof(log_buf));
26 bpf_program__set_log_buf(skel->progs.bad_relo, log_buf, log_buf_size ?: sizeof(log_buf));
27 bpf_program__set_log_level(skel->progs.bad_relo, 1 | 8); /* BPF_LOG_FIXED to force truncation */
28
29 err = test_log_fixup__load(skel);
30 if (!ASSERT_ERR(err, "load_fail"))
31 goto cleanup;
32
33 ASSERT_HAS_SUBSTR(log_buf,
34 "0: <invalid CO-RE relocation>\n"
35 "failed to resolve CO-RE relocation <byte_sz> ",
36 "log_buf_part1");
37
38 switch (trunc_type) {
39 case TRUNC_NONE:
40 ASSERT_HAS_SUBSTR(log_buf,
41 "struct task_struct___bad.fake_field (0:1 @ offset 4)\n",
42 "log_buf_part2");
43 ASSERT_HAS_SUBSTR(log_buf,
44 "max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0\n",
45 "log_buf_end");
46 break;
47 case TRUNC_PARTIAL:
48 /* we should get full libbpf message patch */
49 ASSERT_HAS_SUBSTR(log_buf,
50 "struct task_struct___bad.fake_field (0:1 @ offset 4)\n",
51 "log_buf_part2");
52 /* we shouldn't get full end of BPF verifier log */
53 ASSERT_NULL(strstr(log_buf, "max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0\n"),
54 "log_buf_end");
55 break;
56 case TRUNC_FULL:
57 /* we shouldn't get second part of libbpf message patch */
58 ASSERT_NULL(strstr(log_buf, "struct task_struct___bad.fake_field (0:1 @ offset 4)\n"),
59 "log_buf_part2");
60 /* we shouldn't get full end of BPF verifier log */
61 ASSERT_NULL(strstr(log_buf, "max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0\n"),
62 "log_buf_end");
63 break;
64 }
65
66 if (env.verbosity > VERBOSE_NONE)
67 printf("LOG: \n=================\n%s=================\n", log_buf);
68cleanup:
69 test_log_fixup__destroy(skel);
70}
71
72static void bad_core_relo_subprog(void)
73{
74 char log_buf[8 * 1024];
75 struct test_log_fixup* skel;
76 int err;
77
78 skel = test_log_fixup__open();
79 if (!ASSERT_OK_PTR(skel, "skel_open"))
80 return;
81
82 bpf_program__set_autoload(skel->progs.bad_relo_subprog, true);
83 bpf_program__set_log_buf(skel->progs.bad_relo_subprog, log_buf, sizeof(log_buf));
84
85 err = test_log_fixup__load(skel);
86 if (!ASSERT_ERR(err, "load_fail"))
87 goto cleanup;
88
89 ASSERT_HAS_SUBSTR(log_buf,
90 ": <invalid CO-RE relocation>\n"
91 "failed to resolve CO-RE relocation <byte_off> ",
92 "log_buf");
93 ASSERT_HAS_SUBSTR(log_buf,
94 "struct task_struct___bad.fake_field_subprog (0:2 @ offset 8)\n",
95 "log_buf");
96
97 if (env.verbosity > VERBOSE_NONE)
98 printf("LOG: \n=================\n%s=================\n", log_buf);
99
100cleanup:
101 test_log_fixup__destroy(skel);
102}
103
104static void missing_map(void)
105{
106 char log_buf[8 * 1024];
107 struct test_log_fixup* skel;
108 int err;
109
110 skel = test_log_fixup__open();
111 if (!ASSERT_OK_PTR(skel, "skel_open"))
112 return;
113
114 bpf_map__set_autocreate(skel->maps.missing_map, false);
115
116 bpf_program__set_autoload(skel->progs.use_missing_map, true);
117 bpf_program__set_log_buf(skel->progs.use_missing_map, log_buf, sizeof(log_buf));
118
119 err = test_log_fixup__load(skel);
120 if (!ASSERT_ERR(err, "load_fail"))
121 goto cleanup;
122
123 ASSERT_TRUE(bpf_map__autocreate(skel->maps.existing_map), "existing_map_autocreate");
124 ASSERT_FALSE(bpf_map__autocreate(skel->maps.missing_map), "missing_map_autocreate");
125
126 ASSERT_HAS_SUBSTR(log_buf,
127 ": <invalid BPF map reference>\n"
128 "BPF map 'missing_map' is referenced but wasn't created\n",
129 "log_buf");
130
131 if (env.verbosity > VERBOSE_NONE)
132 printf("LOG: \n=================\n%s=================\n", log_buf);
133
134cleanup:
135 test_log_fixup__destroy(skel);
136}
137
138static void missing_kfunc(void)
139{
140 char log_buf[8 * 1024];
141 struct test_log_fixup* skel;
142 int err;
143
144 skel = test_log_fixup__open();
145 if (!ASSERT_OK_PTR(skel, "skel_open"))
146 return;
147
148 bpf_program__set_autoload(skel->progs.use_missing_kfunc, true);
149 bpf_program__set_log_buf(skel->progs.use_missing_kfunc, log_buf, sizeof(log_buf));
150
151 err = test_log_fixup__load(skel);
152 if (!ASSERT_ERR(err, "load_fail"))
153 goto cleanup;
154
155 ASSERT_HAS_SUBSTR(log_buf,
156 "0: <invalid kfunc call>\n"
157 "kfunc 'bpf_nonexistent_kfunc' is referenced but wasn't resolved\n",
158 "log_buf");
159
160 if (env.verbosity > VERBOSE_NONE)
161 printf("LOG: \n=================\n%s=================\n", log_buf);
162
163cleanup:
164 test_log_fixup__destroy(skel);
165}
166
167void test_log_fixup(void)
168{
169 if (test__start_subtest("bad_core_relo_trunc_none"))
170 bad_core_relo(0, TRUNC_NONE /* full buf */);
171 if (test__start_subtest("bad_core_relo_trunc_partial"))
172 bad_core_relo(300, TRUNC_PARTIAL /* truncate original log a bit */);
173 if (test__start_subtest("bad_core_relo_trunc_full"))
174 bad_core_relo(240, TRUNC_FULL /* truncate also libbpf's message patch */);
175 if (test__start_subtest("bad_core_relo_subprog"))
176 bad_core_relo_subprog();
177 if (test__start_subtest("missing_map"))
178 missing_map();
179 if (test__start_subtest("missing_kfunc"))
180 missing_kfunc();
181}
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
3#include <test_progs.h>
4#include <bpf/btf.h>
5
6#include "test_log_fixup.skel.h"
7
8enum trunc_type {
9 TRUNC_NONE,
10 TRUNC_PARTIAL,
11 TRUNC_FULL,
12};
13
14static void bad_core_relo(size_t log_buf_size, enum trunc_type trunc_type)
15{
16 char log_buf[8 * 1024];
17 struct test_log_fixup* skel;
18 int err;
19
20 skel = test_log_fixup__open();
21 if (!ASSERT_OK_PTR(skel, "skel_open"))
22 return;
23
24 bpf_program__set_autoload(skel->progs.bad_relo, true);
25 memset(log_buf, 0, sizeof(log_buf));
26 bpf_program__set_log_buf(skel->progs.bad_relo, log_buf, log_buf_size ?: sizeof(log_buf));
27 bpf_program__set_log_level(skel->progs.bad_relo, 1 | 8); /* BPF_LOG_FIXED to force truncation */
28
29 err = test_log_fixup__load(skel);
30 if (!ASSERT_ERR(err, "load_fail"))
31 goto cleanup;
32
33 ASSERT_HAS_SUBSTR(log_buf,
34 "0: <invalid CO-RE relocation>\n"
35 "failed to resolve CO-RE relocation <byte_sz> ",
36 "log_buf_part1");
37
38 switch (trunc_type) {
39 case TRUNC_NONE:
40 ASSERT_HAS_SUBSTR(log_buf,
41 "struct task_struct___bad.fake_field (0:1 @ offset 4)\n",
42 "log_buf_part2");
43 ASSERT_HAS_SUBSTR(log_buf,
44 "max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0\n",
45 "log_buf_end");
46 break;
47 case TRUNC_PARTIAL:
48 /* we should get full libbpf message patch */
49 ASSERT_HAS_SUBSTR(log_buf,
50 "struct task_struct___bad.fake_field (0:1 @ offset 4)\n",
51 "log_buf_part2");
52 /* we shouldn't get full end of BPF verifier log */
53 ASSERT_NULL(strstr(log_buf, "max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0\n"),
54 "log_buf_end");
55 break;
56 case TRUNC_FULL:
57 /* we shouldn't get second part of libbpf message patch */
58 ASSERT_NULL(strstr(log_buf, "struct task_struct___bad.fake_field (0:1 @ offset 4)\n"),
59 "log_buf_part2");
60 /* we shouldn't get full end of BPF verifier log */
61 ASSERT_NULL(strstr(log_buf, "max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0\n"),
62 "log_buf_end");
63 break;
64 }
65
66 if (env.verbosity > VERBOSE_NONE)
67 printf("LOG: \n=================\n%s=================\n", log_buf);
68cleanup:
69 test_log_fixup__destroy(skel);
70}
71
72static void bad_core_relo_subprog(void)
73{
74 char log_buf[8 * 1024];
75 struct test_log_fixup* skel;
76 int err;
77
78 skel = test_log_fixup__open();
79 if (!ASSERT_OK_PTR(skel, "skel_open"))
80 return;
81
82 bpf_program__set_autoload(skel->progs.bad_relo_subprog, true);
83 bpf_program__set_log_buf(skel->progs.bad_relo_subprog, log_buf, sizeof(log_buf));
84
85 err = test_log_fixup__load(skel);
86 if (!ASSERT_ERR(err, "load_fail"))
87 goto cleanup;
88
89 ASSERT_HAS_SUBSTR(log_buf,
90 ": <invalid CO-RE relocation>\n"
91 "failed to resolve CO-RE relocation <byte_off> ",
92 "log_buf");
93 ASSERT_HAS_SUBSTR(log_buf,
94 "struct task_struct___bad.fake_field_subprog (0:2 @ offset 8)\n",
95 "log_buf");
96
97 if (env.verbosity > VERBOSE_NONE)
98 printf("LOG: \n=================\n%s=================\n", log_buf);
99
100cleanup:
101 test_log_fixup__destroy(skel);
102}
103
104static void missing_map(void)
105{
106 char log_buf[8 * 1024];
107 struct test_log_fixup* skel;
108 int err;
109
110 skel = test_log_fixup__open();
111 if (!ASSERT_OK_PTR(skel, "skel_open"))
112 return;
113
114 bpf_map__set_autocreate(skel->maps.missing_map, false);
115
116 bpf_program__set_autoload(skel->progs.use_missing_map, true);
117 bpf_program__set_log_buf(skel->progs.use_missing_map, log_buf, sizeof(log_buf));
118
119 err = test_log_fixup__load(skel);
120 if (!ASSERT_ERR(err, "load_fail"))
121 goto cleanup;
122
123 ASSERT_TRUE(bpf_map__autocreate(skel->maps.existing_map), "existing_map_autocreate");
124 ASSERT_FALSE(bpf_map__autocreate(skel->maps.missing_map), "missing_map_autocreate");
125
126 ASSERT_HAS_SUBSTR(log_buf,
127 ": <invalid BPF map reference>\n"
128 "BPF map 'missing_map' is referenced but wasn't created\n",
129 "log_buf");
130
131 if (env.verbosity > VERBOSE_NONE)
132 printf("LOG: \n=================\n%s=================\n", log_buf);
133
134cleanup:
135 test_log_fixup__destroy(skel);
136}
137
138static void missing_kfunc(void)
139{
140 char log_buf[8 * 1024];
141 struct test_log_fixup* skel;
142 int err;
143
144 skel = test_log_fixup__open();
145 if (!ASSERT_OK_PTR(skel, "skel_open"))
146 return;
147
148 bpf_program__set_autoload(skel->progs.use_missing_kfunc, true);
149 bpf_program__set_log_buf(skel->progs.use_missing_kfunc, log_buf, sizeof(log_buf));
150
151 err = test_log_fixup__load(skel);
152 if (!ASSERT_ERR(err, "load_fail"))
153 goto cleanup;
154
155 ASSERT_HAS_SUBSTR(log_buf,
156 "0: <invalid kfunc call>\n"
157 "kfunc 'bpf_nonexistent_kfunc' is referenced but wasn't resolved\n",
158 "log_buf");
159
160 if (env.verbosity > VERBOSE_NONE)
161 printf("LOG: \n=================\n%s=================\n", log_buf);
162
163cleanup:
164 test_log_fixup__destroy(skel);
165}
166
167void test_log_fixup(void)
168{
169 if (test__start_subtest("bad_core_relo_trunc_none"))
170 bad_core_relo(0, TRUNC_NONE /* full buf */);
171 if (test__start_subtest("bad_core_relo_trunc_partial"))
172 bad_core_relo(280, TRUNC_PARTIAL /* truncate original log a bit */);
173 if (test__start_subtest("bad_core_relo_trunc_full"))
174 bad_core_relo(220, TRUNC_FULL /* truncate also libbpf's message patch */);
175 if (test__start_subtest("bad_core_relo_subprog"))
176 bad_core_relo_subprog();
177 if (test__start_subtest("missing_map"))
178 missing_map();
179 if (test__start_subtest("missing_kfunc"))
180 missing_kfunc();
181}