| // SPDX-License-Identifier: GPL-2.0 |
| /* Copyright (c) 2022 Facebook */ |
| |
| #include <test_progs.h> |
| #include "dynptr_fail.skel.h" |
| #include "dynptr_success.skel.h" |
| |
| static size_t log_buf_sz = 1048576; /* 1 MB */ |
| static char obj_log_buf[1048576]; |
| |
| static struct { |
| const char *prog_name; |
| const char *expected_err_msg; |
| } dynptr_tests[] = { |
| /* failure cases */ |
| {"ringbuf_missing_release1", "Unreleased reference id=1"}, |
| {"ringbuf_missing_release2", "Unreleased reference id=2"}, |
| {"ringbuf_missing_release_callback", "Unreleased reference id"}, |
| {"use_after_invalid", "Expected an initialized dynptr as arg #3"}, |
| {"ringbuf_invalid_api", "type=mem expected=alloc_mem"}, |
| {"add_dynptr_to_map1", "invalid indirect read from stack"}, |
| {"add_dynptr_to_map2", "invalid indirect read from stack"}, |
| {"data_slice_out_of_bounds_ringbuf", "value is outside of the allowed memory range"}, |
| {"data_slice_out_of_bounds_map_value", "value is outside of the allowed memory range"}, |
| {"data_slice_use_after_release", "invalid mem access 'scalar'"}, |
| {"data_slice_missing_null_check1", "invalid mem access 'mem_or_null'"}, |
| {"data_slice_missing_null_check2", "invalid mem access 'mem_or_null'"}, |
| {"invalid_helper1", "invalid indirect read from stack"}, |
| {"invalid_helper2", "Expected an initialized dynptr as arg #3"}, |
| {"invalid_write1", "Expected an initialized dynptr as arg #1"}, |
| {"invalid_write2", "Expected an initialized dynptr as arg #3"}, |
| {"invalid_write3", "Expected an initialized ringbuf dynptr as arg #1"}, |
| {"invalid_write4", "arg 1 is an unacquired reference"}, |
| {"invalid_read1", "invalid read from stack"}, |
| {"invalid_read2", "cannot pass in dynptr at an offset"}, |
| {"invalid_read3", "invalid read from stack"}, |
| {"invalid_read4", "invalid read from stack"}, |
| {"invalid_offset", "invalid write to stack"}, |
| {"global", "type=map_value expected=fp"}, |
| {"release_twice", "arg 1 is an unacquired reference"}, |
| {"release_twice_callback", "arg 1 is an unacquired reference"}, |
| {"dynptr_from_mem_invalid_api", |
| "Unsupported reg type fp for bpf_dynptr_from_mem data"}, |
| |
| /* success cases */ |
| {"test_read_write", NULL}, |
| {"test_data_slice", NULL}, |
| {"test_ringbuf", NULL}, |
| }; |
| |
| static void verify_fail(const char *prog_name, const char *expected_err_msg) |
| { |
| LIBBPF_OPTS(bpf_object_open_opts, opts); |
| struct bpf_program *prog; |
| struct dynptr_fail *skel; |
| int err; |
| |
| opts.kernel_log_buf = obj_log_buf; |
| opts.kernel_log_size = log_buf_sz; |
| opts.kernel_log_level = 1; |
| |
| skel = dynptr_fail__open_opts(&opts); |
| if (!ASSERT_OK_PTR(skel, "dynptr_fail__open_opts")) |
| goto cleanup; |
| |
| prog = bpf_object__find_program_by_name(skel->obj, prog_name); |
| if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) |
| goto cleanup; |
| |
| bpf_program__set_autoload(prog, true); |
| |
| bpf_map__set_max_entries(skel->maps.ringbuf, getpagesize()); |
| |
| err = dynptr_fail__load(skel); |
| if (!ASSERT_ERR(err, "unexpected load success")) |
| goto cleanup; |
| |
| if (!ASSERT_OK_PTR(strstr(obj_log_buf, expected_err_msg), "expected_err_msg")) { |
| fprintf(stderr, "Expected err_msg: %s\n", expected_err_msg); |
| fprintf(stderr, "Verifier output: %s\n", obj_log_buf); |
| } |
| |
| cleanup: |
| dynptr_fail__destroy(skel); |
| } |
| |
| static void verify_success(const char *prog_name) |
| { |
| struct dynptr_success *skel; |
| struct bpf_program *prog; |
| struct bpf_link *link; |
| |
| skel = dynptr_success__open(); |
| if (!ASSERT_OK_PTR(skel, "dynptr_success__open")) |
| return; |
| |
| skel->bss->pid = getpid(); |
| |
| bpf_map__set_max_entries(skel->maps.ringbuf, getpagesize()); |
| |
| dynptr_success__load(skel); |
| if (!ASSERT_OK_PTR(skel, "dynptr_success__load")) |
| goto cleanup; |
| |
| prog = bpf_object__find_program_by_name(skel->obj, prog_name); |
| if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) |
| goto cleanup; |
| |
| link = bpf_program__attach(prog); |
| if (!ASSERT_OK_PTR(link, "bpf_program__attach")) |
| goto cleanup; |
| |
| usleep(1); |
| |
| ASSERT_EQ(skel->bss->err, 0, "err"); |
| |
| bpf_link__destroy(link); |
| |
| cleanup: |
| dynptr_success__destroy(skel); |
| } |
| |
| void test_dynptr(void) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(dynptr_tests); i++) { |
| if (!test__start_subtest(dynptr_tests[i].prog_name)) |
| continue; |
| |
| if (dynptr_tests[i].expected_err_msg) |
| verify_fail(dynptr_tests[i].prog_name, |
| dynptr_tests[i].expected_err_msg); |
| else |
| verify_success(dynptr_tests[i].prog_name); |
| } |
| } |