1*0cf7052aSJoanne Koong // SPDX-License-Identifier: GPL-2.0 2*0cf7052aSJoanne Koong /* Copyright (c) 2022 Facebook */ 3*0cf7052aSJoanne Koong 4*0cf7052aSJoanne Koong #include <test_progs.h> 5*0cf7052aSJoanne Koong #include "dynptr_fail.skel.h" 6*0cf7052aSJoanne Koong #include "dynptr_success.skel.h" 7*0cf7052aSJoanne Koong 8*0cf7052aSJoanne Koong static size_t log_buf_sz = 1048576; /* 1 MB */ 9*0cf7052aSJoanne Koong static char obj_log_buf[1048576]; 10*0cf7052aSJoanne Koong 11*0cf7052aSJoanne Koong static struct { 12*0cf7052aSJoanne Koong const char *prog_name; 13*0cf7052aSJoanne Koong const char *expected_err_msg; 14*0cf7052aSJoanne Koong } dynptr_tests[] = { 15*0cf7052aSJoanne Koong /* failure cases */ 16*0cf7052aSJoanne Koong {"ringbuf_missing_release1", "Unreleased reference id=1"}, 17*0cf7052aSJoanne Koong {"ringbuf_missing_release2", "Unreleased reference id=2"}, 18*0cf7052aSJoanne Koong {"ringbuf_missing_release_callback", "Unreleased reference id"}, 19*0cf7052aSJoanne Koong {"use_after_invalid", "Expected an initialized dynptr as arg #3"}, 20*0cf7052aSJoanne Koong {"ringbuf_invalid_api", "type=mem expected=alloc_mem"}, 21*0cf7052aSJoanne Koong {"add_dynptr_to_map1", "invalid indirect read from stack"}, 22*0cf7052aSJoanne Koong {"add_dynptr_to_map2", "invalid indirect read from stack"}, 23*0cf7052aSJoanne Koong {"data_slice_out_of_bounds_ringbuf", "value is outside of the allowed memory range"}, 24*0cf7052aSJoanne Koong {"data_slice_out_of_bounds_map_value", "value is outside of the allowed memory range"}, 25*0cf7052aSJoanne Koong {"data_slice_use_after_release", "invalid mem access 'scalar'"}, 26*0cf7052aSJoanne Koong {"data_slice_missing_null_check1", "invalid mem access 'mem_or_null'"}, 27*0cf7052aSJoanne Koong {"data_slice_missing_null_check2", "invalid mem access 'mem_or_null'"}, 28*0cf7052aSJoanne Koong {"invalid_helper1", "invalid indirect read from stack"}, 29*0cf7052aSJoanne Koong {"invalid_helper2", "Expected an initialized dynptr as arg #3"}, 30*0cf7052aSJoanne Koong {"invalid_write1", "Expected an initialized dynptr as arg #1"}, 31*0cf7052aSJoanne Koong {"invalid_write2", "Expected an initialized dynptr as arg #3"}, 32*0cf7052aSJoanne Koong {"invalid_write3", "Expected an initialized ringbuf dynptr as arg #1"}, 33*0cf7052aSJoanne Koong {"invalid_write4", "arg 1 is an unacquired reference"}, 34*0cf7052aSJoanne Koong {"invalid_read1", "invalid read from stack"}, 35*0cf7052aSJoanne Koong {"invalid_read2", "cannot pass in dynptr at an offset"}, 36*0cf7052aSJoanne Koong {"invalid_read3", "invalid read from stack"}, 37*0cf7052aSJoanne Koong {"invalid_read4", "invalid read from stack"}, 38*0cf7052aSJoanne Koong {"invalid_offset", "invalid write to stack"}, 39*0cf7052aSJoanne Koong {"global", "type=map_value expected=fp"}, 40*0cf7052aSJoanne Koong {"release_twice", "arg 1 is an unacquired reference"}, 41*0cf7052aSJoanne Koong {"release_twice_callback", "arg 1 is an unacquired reference"}, 42*0cf7052aSJoanne Koong {"dynptr_from_mem_invalid_api", 43*0cf7052aSJoanne Koong "Unsupported reg type fp for bpf_dynptr_from_mem data"}, 44*0cf7052aSJoanne Koong 45*0cf7052aSJoanne Koong /* success cases */ 46*0cf7052aSJoanne Koong {"test_read_write", NULL}, 47*0cf7052aSJoanne Koong {"test_data_slice", NULL}, 48*0cf7052aSJoanne Koong {"test_ringbuf", NULL}, 49*0cf7052aSJoanne Koong }; 50*0cf7052aSJoanne Koong 51*0cf7052aSJoanne Koong static void verify_fail(const char *prog_name, const char *expected_err_msg) 52*0cf7052aSJoanne Koong { 53*0cf7052aSJoanne Koong LIBBPF_OPTS(bpf_object_open_opts, opts); 54*0cf7052aSJoanne Koong struct bpf_program *prog; 55*0cf7052aSJoanne Koong struct dynptr_fail *skel; 56*0cf7052aSJoanne Koong int err; 57*0cf7052aSJoanne Koong 58*0cf7052aSJoanne Koong opts.kernel_log_buf = obj_log_buf; 59*0cf7052aSJoanne Koong opts.kernel_log_size = log_buf_sz; 60*0cf7052aSJoanne Koong opts.kernel_log_level = 1; 61*0cf7052aSJoanne Koong 62*0cf7052aSJoanne Koong skel = dynptr_fail__open_opts(&opts); 63*0cf7052aSJoanne Koong if (!ASSERT_OK_PTR(skel, "dynptr_fail__open_opts")) 64*0cf7052aSJoanne Koong goto cleanup; 65*0cf7052aSJoanne Koong 66*0cf7052aSJoanne Koong prog = bpf_object__find_program_by_name(skel->obj, prog_name); 67*0cf7052aSJoanne Koong if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) 68*0cf7052aSJoanne Koong goto cleanup; 69*0cf7052aSJoanne Koong 70*0cf7052aSJoanne Koong bpf_program__set_autoload(prog, true); 71*0cf7052aSJoanne Koong 72*0cf7052aSJoanne Koong bpf_map__set_max_entries(skel->maps.ringbuf, getpagesize()); 73*0cf7052aSJoanne Koong 74*0cf7052aSJoanne Koong err = dynptr_fail__load(skel); 75*0cf7052aSJoanne Koong if (!ASSERT_ERR(err, "unexpected load success")) 76*0cf7052aSJoanne Koong goto cleanup; 77*0cf7052aSJoanne Koong 78*0cf7052aSJoanne Koong if (!ASSERT_OK_PTR(strstr(obj_log_buf, expected_err_msg), "expected_err_msg")) { 79*0cf7052aSJoanne Koong fprintf(stderr, "Expected err_msg: %s\n", expected_err_msg); 80*0cf7052aSJoanne Koong fprintf(stderr, "Verifier output: %s\n", obj_log_buf); 81*0cf7052aSJoanne Koong } 82*0cf7052aSJoanne Koong 83*0cf7052aSJoanne Koong cleanup: 84*0cf7052aSJoanne Koong dynptr_fail__destroy(skel); 85*0cf7052aSJoanne Koong } 86*0cf7052aSJoanne Koong 87*0cf7052aSJoanne Koong static void verify_success(const char *prog_name) 88*0cf7052aSJoanne Koong { 89*0cf7052aSJoanne Koong struct dynptr_success *skel; 90*0cf7052aSJoanne Koong struct bpf_program *prog; 91*0cf7052aSJoanne Koong struct bpf_link *link; 92*0cf7052aSJoanne Koong 93*0cf7052aSJoanne Koong skel = dynptr_success__open(); 94*0cf7052aSJoanne Koong if (!ASSERT_OK_PTR(skel, "dynptr_success__open")) 95*0cf7052aSJoanne Koong return; 96*0cf7052aSJoanne Koong 97*0cf7052aSJoanne Koong skel->bss->pid = getpid(); 98*0cf7052aSJoanne Koong 99*0cf7052aSJoanne Koong bpf_map__set_max_entries(skel->maps.ringbuf, getpagesize()); 100*0cf7052aSJoanne Koong 101*0cf7052aSJoanne Koong dynptr_success__load(skel); 102*0cf7052aSJoanne Koong if (!ASSERT_OK_PTR(skel, "dynptr_success__load")) 103*0cf7052aSJoanne Koong goto cleanup; 104*0cf7052aSJoanne Koong 105*0cf7052aSJoanne Koong prog = bpf_object__find_program_by_name(skel->obj, prog_name); 106*0cf7052aSJoanne Koong if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) 107*0cf7052aSJoanne Koong goto cleanup; 108*0cf7052aSJoanne Koong 109*0cf7052aSJoanne Koong link = bpf_program__attach(prog); 110*0cf7052aSJoanne Koong if (!ASSERT_OK_PTR(link, "bpf_program__attach")) 111*0cf7052aSJoanne Koong goto cleanup; 112*0cf7052aSJoanne Koong 113*0cf7052aSJoanne Koong usleep(1); 114*0cf7052aSJoanne Koong 115*0cf7052aSJoanne Koong ASSERT_EQ(skel->bss->err, 0, "err"); 116*0cf7052aSJoanne Koong 117*0cf7052aSJoanne Koong bpf_link__destroy(link); 118*0cf7052aSJoanne Koong 119*0cf7052aSJoanne Koong cleanup: 120*0cf7052aSJoanne Koong dynptr_success__destroy(skel); 121*0cf7052aSJoanne Koong } 122*0cf7052aSJoanne Koong 123*0cf7052aSJoanne Koong void test_dynptr(void) 124*0cf7052aSJoanne Koong { 125*0cf7052aSJoanne Koong int i; 126*0cf7052aSJoanne Koong 127*0cf7052aSJoanne Koong for (i = 0; i < ARRAY_SIZE(dynptr_tests); i++) { 128*0cf7052aSJoanne Koong if (!test__start_subtest(dynptr_tests[i].prog_name)) 129*0cf7052aSJoanne Koong continue; 130*0cf7052aSJoanne Koong 131*0cf7052aSJoanne Koong if (dynptr_tests[i].expected_err_msg) 132*0cf7052aSJoanne Koong verify_fail(dynptr_tests[i].prog_name, 133*0cf7052aSJoanne Koong dynptr_tests[i].expected_err_msg); 134*0cf7052aSJoanne Koong else 135*0cf7052aSJoanne Koong verify_success(dynptr_tests[i].prog_name); 136*0cf7052aSJoanne Koong } 137*0cf7052aSJoanne Koong } 138