string_kfuncs.c

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (C) 2025 Red Hat, Inc.*/
 3#include <test_progs.h>
 4#include "string_kfuncs_success.skel.h"
 5#include "string_kfuncs_failure1.skel.h"
 6#include "string_kfuncs_failure2.skel.h"
 7#include <sys/mman.h>
 8
 9static const char * const test_cases[] = {
10	"strcmp",
11	"strcasecmp",
12	"strchr",
13	"strchrnul",
14	"strnchr",
15	"strrchr",
16	"strlen",
17	"strnlen",
18	"strspn_str",
19	"strspn_accept",
20	"strcspn_str",
21	"strcspn_reject",
22	"strstr",
23	"strcasestr",
24	"strnstr",
25	"strncasestr",
26};
27
28void run_too_long_tests(void)
29{
30	struct string_kfuncs_failure2 *skel;
31	struct bpf_program *prog;
32	char test_name[256];
33	int err, i;
34
35	skel = string_kfuncs_failure2__open_and_load();
36	if (!ASSERT_OK_PTR(skel, "string_kfuncs_failure2__open_and_load"))
37		return;
38
39	memset(skel->bss->long_str, 'a', sizeof(skel->bss->long_str));
40
41	for (i = 0; i < ARRAY_SIZE(test_cases); i++) {
42		sprintf(test_name, "test_%s_too_long", test_cases[i]);
43		if (!test__start_subtest(test_name))
44			continue;
45
46		prog = bpf_object__find_program_by_name(skel->obj, test_name);
47		if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
48			goto cleanup;
49
50		LIBBPF_OPTS(bpf_test_run_opts, topts);
51		err = bpf_prog_test_run_opts(bpf_program__fd(prog), &topts);
52		if (!ASSERT_OK(err, "bpf_prog_test_run"))
53			goto cleanup;
54
55		ASSERT_EQ(topts.retval, -E2BIG, "reading too long string fails with -E2BIG");
56	}
57
58cleanup:
59	string_kfuncs_failure2__destroy(skel);
60}
61
62void test_string_kfuncs(void)
63{
64	RUN_TESTS(string_kfuncs_success);
65	RUN_TESTS(string_kfuncs_failure1);
66
67	run_too_long_tests();
68}