1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2022 Facebook */
3
4 #include <test_progs.h>
5 #include "dynptr_fail.skel.h"
6 #include "dynptr_success.skel.h"
7
8 static size_t log_buf_sz = 1048576; /* 1 MB */
9 static char obj_log_buf[1048576];
10
11 static struct {
12 const char *prog_name;
13 const char *expected_err_msg;
14 } dynptr_tests[] = {
15 /* failure cases */
16 {"ringbuf_missing_release1", "Unreleased reference id=1"},
17 {"ringbuf_missing_release2", "Unreleased reference id=2"},
18 {"ringbuf_missing_release_callback", "Unreleased reference id"},
19 {"use_after_invalid", "Expected an initialized dynptr as arg #3"},
20 {"ringbuf_invalid_api", "type=mem expected=alloc_mem"},
21 {"add_dynptr_to_map1", "invalid indirect read from stack"},
22 {"add_dynptr_to_map2", "invalid indirect read from stack"},
23 {"data_slice_out_of_bounds_ringbuf", "value is outside of the allowed memory range"},
24 {"data_slice_out_of_bounds_map_value", "value is outside of the allowed memory range"},
25 {"data_slice_use_after_release1", "invalid mem access 'scalar'"},
26 {"data_slice_use_after_release2", "invalid mem access 'scalar'"},
27 {"data_slice_missing_null_check1", "invalid mem access 'mem_or_null'"},
28 {"data_slice_missing_null_check2", "invalid mem access 'mem_or_null'"},
29 {"invalid_helper1", "invalid indirect read from stack"},
30 {"invalid_helper2", "Expected an initialized dynptr as arg #3"},
31 {"invalid_write1", "Expected an initialized dynptr as arg #1"},
32 {"invalid_write2", "Expected an initialized dynptr as arg #3"},
33 {"invalid_write3", "Expected an initialized dynptr as arg #1"},
34 {"invalid_write4", "arg 1 is an unacquired reference"},
35 {"invalid_read1", "invalid read from stack"},
36 {"invalid_read2", "cannot pass in dynptr at an offset"},
37 {"invalid_read3", "invalid read from stack"},
38 {"invalid_read4", "invalid read from stack"},
39 {"invalid_offset", "invalid write to stack"},
40 {"global", "type=map_value expected=fp"},
41 {"release_twice", "arg 1 is an unacquired reference"},
42 {"release_twice_callback", "arg 1 is an unacquired reference"},
43 {"dynptr_from_mem_invalid_api",
44 "Unsupported reg type fp for bpf_dynptr_from_mem data"},
45
46 /* success cases */
47 {"test_read_write", NULL},
48 {"test_data_slice", NULL},
49 {"test_ringbuf", NULL},
50 };
51
verify_fail(const char * prog_name,const char * expected_err_msg)52 static void verify_fail(const char *prog_name, const char *expected_err_msg)
53 {
54 LIBBPF_OPTS(bpf_object_open_opts, opts);
55 struct bpf_program *prog;
56 struct dynptr_fail *skel;
57 int err;
58
59 opts.kernel_log_buf = obj_log_buf;
60 opts.kernel_log_size = log_buf_sz;
61 opts.kernel_log_level = 1;
62
63 skel = dynptr_fail__open_opts(&opts);
64 if (!ASSERT_OK_PTR(skel, "dynptr_fail__open_opts"))
65 goto cleanup;
66
67 prog = bpf_object__find_program_by_name(skel->obj, prog_name);
68 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
69 goto cleanup;
70
71 bpf_program__set_autoload(prog, true);
72
73 bpf_map__set_max_entries(skel->maps.ringbuf, getpagesize());
74
75 err = dynptr_fail__load(skel);
76 if (!ASSERT_ERR(err, "unexpected load success"))
77 goto cleanup;
78
79 if (!ASSERT_OK_PTR(strstr(obj_log_buf, expected_err_msg), "expected_err_msg")) {
80 fprintf(stderr, "Expected err_msg: %s\n", expected_err_msg);
81 fprintf(stderr, "Verifier output: %s\n", obj_log_buf);
82 }
83
84 cleanup:
85 dynptr_fail__destroy(skel);
86 }
87
verify_success(const char * prog_name)88 static void verify_success(const char *prog_name)
89 {
90 struct dynptr_success *skel;
91 struct bpf_program *prog;
92 struct bpf_link *link;
93
94 skel = dynptr_success__open();
95 if (!ASSERT_OK_PTR(skel, "dynptr_success__open"))
96 return;
97
98 skel->bss->pid = getpid();
99
100 bpf_map__set_max_entries(skel->maps.ringbuf, getpagesize());
101
102 dynptr_success__load(skel);
103 if (!ASSERT_OK_PTR(skel, "dynptr_success__load"))
104 goto cleanup;
105
106 prog = bpf_object__find_program_by_name(skel->obj, prog_name);
107 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
108 goto cleanup;
109
110 link = bpf_program__attach(prog);
111 if (!ASSERT_OK_PTR(link, "bpf_program__attach"))
112 goto cleanup;
113
114 usleep(1);
115
116 ASSERT_EQ(skel->bss->err, 0, "err");
117
118 bpf_link__destroy(link);
119
120 cleanup:
121 dynptr_success__destroy(skel);
122 }
123
test_dynptr(void)124 void test_dynptr(void)
125 {
126 int i;
127
128 for (i = 0; i < ARRAY_SIZE(dynptr_tests); i++) {
129 if (!test__start_subtest(dynptr_tests[i].prog_name))
130 continue;
131
132 if (dynptr_tests[i].expected_err_msg)
133 verify_fail(dynptr_tests[i].prog_name,
134 dynptr_tests[i].expected_err_msg);
135 else
136 verify_success(dynptr_tests[i].prog_name);
137 }
138 }
139