150 lines
5.4 KiB
C
150 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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#include <network_helpers.h>
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#include "map_kptr.skel.h"
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#include "map_kptr_fail.skel.h"
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static char log_buf[1024 * 1024];
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struct {
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const char *prog_name;
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const char *err_msg;
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} map_kptr_fail_tests[] = {
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{ "size_not_bpf_dw", "kptr access size must be BPF_DW" },
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{ "non_const_var_off", "kptr access cannot have variable offset" },
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{ "non_const_var_off_kptr_xchg", "R1 doesn't have constant offset. kptr has to be" },
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{ "misaligned_access_write", "kptr access misaligned expected=8 off=7" },
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{ "misaligned_access_read", "kptr access misaligned expected=8 off=1" },
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{ "reject_var_off_store", "variable untrusted_ptr_ access var_off=(0x0; 0x1e0)" },
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{ "reject_bad_type_match", "invalid kptr access, R1 type=untrusted_ptr_prog_test_ref_kfunc" },
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{ "marked_as_untrusted_or_null", "R1 type=untrusted_ptr_or_null_ expected=percpu_ptr_" },
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{ "correct_btf_id_check_size", "access beyond struct prog_test_ref_kfunc at off 32 size 4" },
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{ "inherit_untrusted_on_walk", "R1 type=untrusted_ptr_ expected=percpu_ptr_" },
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{ "reject_kptr_xchg_on_unref", "off=8 kptr isn't referenced kptr" },
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{ "reject_kptr_get_no_map_val", "arg#0 expected pointer to map value" },
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{ "reject_kptr_get_no_null_map_val", "arg#0 expected pointer to map value" },
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{ "reject_kptr_get_no_kptr", "arg#0 no referenced kptr at map value offset=0" },
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{ "reject_kptr_get_on_unref", "arg#0 no referenced kptr at map value offset=8" },
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{ "reject_kptr_get_bad_type_match", "kernel function bpf_kfunc_call_test_kptr_get args#0" },
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{ "mark_ref_as_untrusted_or_null", "R1 type=untrusted_ptr_or_null_ expected=percpu_ptr_" },
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{ "reject_untrusted_store_to_ref", "store to referenced kptr disallowed" },
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{ "reject_bad_type_xchg", "invalid kptr access, R2 type=ptr_prog_test_ref_kfunc expected=ptr_prog_test_member" },
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{ "reject_untrusted_xchg", "R2 type=untrusted_ptr_ expected=ptr_" },
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{ "reject_member_of_ref_xchg", "invalid kptr access, R2 type=ptr_prog_test_ref_kfunc" },
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{ "reject_indirect_helper_access", "kptr cannot be accessed indirectly by helper" },
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{ "reject_indirect_global_func_access", "kptr cannot be accessed indirectly by helper" },
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{ "kptr_xchg_ref_state", "Unreleased reference id=5 alloc_insn=" },
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{ "kptr_get_ref_state", "Unreleased reference id=3 alloc_insn=" },
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};
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static void test_map_kptr_fail_prog(const char *prog_name, const char *err_msg)
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{
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LIBBPF_OPTS(bpf_object_open_opts, opts, .kernel_log_buf = log_buf,
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.kernel_log_size = sizeof(log_buf),
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.kernel_log_level = 1);
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struct map_kptr_fail *skel;
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struct bpf_program *prog;
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int ret;
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skel = map_kptr_fail__open_opts(&opts);
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if (!ASSERT_OK_PTR(skel, "map_kptr_fail__open_opts"))
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return;
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prog = bpf_object__find_program_by_name(skel->obj, prog_name);
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if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
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goto end;
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bpf_program__set_autoload(prog, true);
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ret = map_kptr_fail__load(skel);
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if (!ASSERT_ERR(ret, "map_kptr__load must fail"))
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goto end;
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if (!ASSERT_OK_PTR(strstr(log_buf, err_msg), "expected error message")) {
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fprintf(stderr, "Expected: %s\n", err_msg);
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fprintf(stderr, "Verifier: %s\n", log_buf);
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}
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end:
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map_kptr_fail__destroy(skel);
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}
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static void test_map_kptr_fail(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(map_kptr_fail_tests); i++) {
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if (!test__start_subtest(map_kptr_fail_tests[i].prog_name))
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continue;
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test_map_kptr_fail_prog(map_kptr_fail_tests[i].prog_name,
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map_kptr_fail_tests[i].err_msg);
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}
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}
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static void test_map_kptr_success(bool test_run)
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{
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LIBBPF_OPTS(bpf_test_run_opts, opts,
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.data_in = &pkt_v4,
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.data_size_in = sizeof(pkt_v4),
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.repeat = 1,
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);
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struct map_kptr *skel;
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int key = 0, ret;
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char buf[16];
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skel = map_kptr__open_and_load();
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if (!ASSERT_OK_PTR(skel, "map_kptr__open_and_load"))
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return;
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ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref), &opts);
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ASSERT_OK(ret, "test_map_kptr_ref refcount");
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ASSERT_OK(opts.retval, "test_map_kptr_ref retval");
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ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref2), &opts);
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ASSERT_OK(ret, "test_map_kptr_ref2 refcount");
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ASSERT_OK(opts.retval, "test_map_kptr_ref2 retval");
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if (test_run)
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goto exit;
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ret = bpf_map__update_elem(skel->maps.array_map,
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&key, sizeof(key), buf, sizeof(buf), 0);
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ASSERT_OK(ret, "array_map update");
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ret = bpf_map__update_elem(skel->maps.array_map,
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&key, sizeof(key), buf, sizeof(buf), 0);
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ASSERT_OK(ret, "array_map update2");
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ret = bpf_map__update_elem(skel->maps.hash_map,
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&key, sizeof(key), buf, sizeof(buf), 0);
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ASSERT_OK(ret, "hash_map update");
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ret = bpf_map__delete_elem(skel->maps.hash_map, &key, sizeof(key), 0);
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ASSERT_OK(ret, "hash_map delete");
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ret = bpf_map__update_elem(skel->maps.hash_malloc_map,
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&key, sizeof(key), buf, sizeof(buf), 0);
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ASSERT_OK(ret, "hash_malloc_map update");
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ret = bpf_map__delete_elem(skel->maps.hash_malloc_map, &key, sizeof(key), 0);
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ASSERT_OK(ret, "hash_malloc_map delete");
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ret = bpf_map__update_elem(skel->maps.lru_hash_map,
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&key, sizeof(key), buf, sizeof(buf), 0);
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ASSERT_OK(ret, "lru_hash_map update");
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ret = bpf_map__delete_elem(skel->maps.lru_hash_map, &key, sizeof(key), 0);
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ASSERT_OK(ret, "lru_hash_map delete");
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exit:
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map_kptr__destroy(skel);
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}
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void test_map_kptr(void)
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{
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if (test__start_subtest("success")) {
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test_map_kptr_success(false);
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/* Do test_run twice, so that we see refcount going back to 1
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* after we leave it in map from first iteration.
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*/
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test_map_kptr_success(true);
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}
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test_map_kptr_fail();
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}
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