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// 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);
}
}
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