1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2022 Facebook */ 3 4 #include <test_progs.h> 5 #include <network_helpers.h> 6 #include "dynptr_fail.skel.h" 7 #include "dynptr_success.skel.h" 8 9 enum test_setup_type { 10 SETUP_SYSCALL_SLEEP, 11 SETUP_SKB_PROG, 12 SETUP_SKB_PROG_TP, 13 SETUP_XDP_PROG, 14 }; 15 16 static struct { 17 const char *prog_name; 18 enum test_setup_type type; 19 } success_tests[] = { 20 {"test_read_write", SETUP_SYSCALL_SLEEP}, 21 {"test_dynptr_data", SETUP_SYSCALL_SLEEP}, 22 {"test_dynptr_copy", SETUP_SYSCALL_SLEEP}, 23 {"test_dynptr_copy_xdp", SETUP_XDP_PROG}, 24 {"test_dynptr_memset_zero", SETUP_SYSCALL_SLEEP}, 25 {"test_dynptr_memset_notzero", SETUP_SYSCALL_SLEEP}, 26 {"test_dynptr_memset_zero_offset", SETUP_SYSCALL_SLEEP}, 27 {"test_dynptr_memset_zero_adjusted", SETUP_SYSCALL_SLEEP}, 28 {"test_dynptr_memset_overflow", SETUP_SYSCALL_SLEEP}, 29 {"test_dynptr_memset_overflow_offset", SETUP_SYSCALL_SLEEP}, 30 {"test_dynptr_memset_readonly", SETUP_SKB_PROG}, 31 {"test_dynptr_memset_xdp_chunks", SETUP_XDP_PROG}, 32 {"test_ringbuf", SETUP_SYSCALL_SLEEP}, 33 {"test_skb_readonly", SETUP_SKB_PROG}, 34 {"test_dynptr_skb_data", SETUP_SKB_PROG}, 35 {"test_adjust", SETUP_SYSCALL_SLEEP}, 36 {"test_adjust_err", SETUP_SYSCALL_SLEEP}, 37 {"test_zero_size_dynptr", SETUP_SYSCALL_SLEEP}, 38 {"test_dynptr_is_null", SETUP_SYSCALL_SLEEP}, 39 {"test_dynptr_is_rdonly", SETUP_SKB_PROG}, 40 {"test_dynptr_clone", SETUP_SKB_PROG}, 41 {"test_dynptr_skb_no_buff", SETUP_SKB_PROG}, 42 {"test_dynptr_skb_strcmp", SETUP_SKB_PROG}, 43 {"test_dynptr_skb_tp_btf", SETUP_SKB_PROG_TP}, 44 {"test_probe_read_user_dynptr", SETUP_XDP_PROG}, 45 {"test_probe_read_kernel_dynptr", SETUP_XDP_PROG}, 46 {"test_probe_read_user_str_dynptr", SETUP_XDP_PROG}, 47 {"test_probe_read_kernel_str_dynptr", SETUP_XDP_PROG}, 48 {"test_copy_from_user_dynptr", SETUP_SYSCALL_SLEEP}, 49 {"test_copy_from_user_str_dynptr", SETUP_SYSCALL_SLEEP}, 50 {"test_copy_from_user_task_dynptr", SETUP_SYSCALL_SLEEP}, 51 {"test_copy_from_user_task_str_dynptr", SETUP_SYSCALL_SLEEP}, 52 }; 53 54 static void verify_success(const char *prog_name, enum test_setup_type setup_type) 55 { 56 char user_data[384] = {[0 ... 382] = 'a', '\0'}; 57 struct dynptr_success *skel; 58 struct bpf_program *prog; 59 struct bpf_link *link; 60 int err; 61 62 skel = dynptr_success__open(); 63 if (!ASSERT_OK_PTR(skel, "dynptr_success__open")) 64 return; 65 66 skel->bss->pid = getpid(); 67 68 prog = bpf_object__find_program_by_name(skel->obj, prog_name); 69 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) 70 goto cleanup; 71 72 bpf_program__set_autoload(prog, true); 73 74 err = dynptr_success__load(skel); 75 if (!ASSERT_OK(err, "dynptr_success__load")) 76 goto cleanup; 77 78 skel->bss->user_ptr = user_data; 79 skel->data->test_len[0] = sizeof(user_data); 80 memcpy(skel->bss->expected_str, user_data, sizeof(user_data)); 81 82 switch (setup_type) { 83 case SETUP_SYSCALL_SLEEP: 84 link = bpf_program__attach(prog); 85 if (!ASSERT_OK_PTR(link, "bpf_program__attach")) 86 goto cleanup; 87 88 usleep(1); 89 90 bpf_link__destroy(link); 91 break; 92 case SETUP_SKB_PROG: 93 { 94 int prog_fd; 95 char buf[64]; 96 97 LIBBPF_OPTS(bpf_test_run_opts, topts, 98 .data_in = &pkt_v4, 99 .data_size_in = sizeof(pkt_v4), 100 .data_out = buf, 101 .data_size_out = sizeof(buf), 102 .repeat = 1, 103 ); 104 105 prog_fd = bpf_program__fd(prog); 106 if (!ASSERT_GE(prog_fd, 0, "prog_fd")) 107 goto cleanup; 108 109 err = bpf_prog_test_run_opts(prog_fd, &topts); 110 111 if (!ASSERT_OK(err, "test_run")) 112 goto cleanup; 113 114 break; 115 } 116 case SETUP_SKB_PROG_TP: 117 { 118 struct __sk_buff skb = {}; 119 struct bpf_object *obj; 120 int aux_prog_fd; 121 122 /* Just use its test_run to trigger kfree_skb tracepoint */ 123 err = bpf_prog_test_load("./test_pkt_access.bpf.o", BPF_PROG_TYPE_SCHED_CLS, 124 &obj, &aux_prog_fd); 125 if (!ASSERT_OK(err, "prog_load sched cls")) 126 goto cleanup; 127 128 LIBBPF_OPTS(bpf_test_run_opts, topts, 129 .data_in = &pkt_v4, 130 .data_size_in = sizeof(pkt_v4), 131 .ctx_in = &skb, 132 .ctx_size_in = sizeof(skb), 133 ); 134 135 link = bpf_program__attach(prog); 136 if (!ASSERT_OK_PTR(link, "bpf_program__attach")) 137 goto cleanup; 138 139 err = bpf_prog_test_run_opts(aux_prog_fd, &topts); 140 bpf_link__destroy(link); 141 142 if (!ASSERT_OK(err, "test_run")) 143 goto cleanup; 144 145 break; 146 } 147 case SETUP_XDP_PROG: 148 { 149 char data[5000]; 150 int err, prog_fd; 151 LIBBPF_OPTS(bpf_test_run_opts, opts, 152 .data_in = &data, 153 .data_size_in = sizeof(data), 154 .repeat = 1, 155 ); 156 157 prog_fd = bpf_program__fd(prog); 158 err = bpf_prog_test_run_opts(prog_fd, &opts); 159 160 if (!ASSERT_OK(err, "test_run")) 161 goto cleanup; 162 163 break; 164 } 165 } 166 167 ASSERT_EQ(skel->bss->err, 0, "err"); 168 169 cleanup: 170 dynptr_success__destroy(skel); 171 } 172 173 void test_dynptr(void) 174 { 175 int i; 176 177 for (i = 0; i < ARRAY_SIZE(success_tests); i++) { 178 if (!test__start_subtest(success_tests[i].prog_name)) 179 continue; 180 181 verify_success(success_tests[i].prog_name, success_tests[i].type); 182 } 183 184 RUN_TESTS(dynptr_fail); 185 } 186