// SPDX-License-Identifier: GPL-2.0 /* Test cases that can't load programs using libbpf and need direct * BPF syscall access */ #include #include #include #include "test_progs.h" #include "test_btf.h" #include "bpf/libbpf_internal.h" static char log[16 * 1024]; static void test_bad_local_id() { struct test_btf { struct btf_header hdr; __u32 types[15]; char strings[128]; } raw_btf = { .hdr = { .magic = BTF_MAGIC, .version = BTF_VERSION, .hdr_len = sizeof(struct btf_header), .type_off = 0, .type_len = sizeof(raw_btf.types), .str_off = offsetof(struct test_btf, strings) - offsetof(struct test_btf, types), .str_len = sizeof(raw_btf.strings), }, .types = { BTF_PTR_ENC(0), /* [1] void* */ BTF_TYPE_INT_ENC(1, BTF_INT_SIGNED, 0, 32, 4), /* [2] int */ BTF_FUNC_PROTO_ENC(2, 1), /* [3] int (*)(void*) */ BTF_FUNC_PROTO_ARG_ENC(8, 1), BTF_FUNC_ENC(8, 3) /* [4] FUNC 'foo' type_id=2 */ }, .strings = "\0int\0 0\0foo\0" }; __u32 log_level = 1 | 2 | 4; LIBBPF_OPTS(bpf_btf_load_opts, opts, .log_buf = log, .log_size = sizeof(log), .log_level = log_level, ); struct bpf_insn insns[] = { BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0), BPF_EXIT_INSN(), }; struct bpf_func_info funcs[] = { { .insn_off = 0, .type_id = 4, } }; struct bpf_core_relo relos[] = { { .insn_off = 0, /* patch first instruction (r0 = 0) */ .type_id = 100500, /* !!! this type id does not exist */ .access_str_off = 6, /* offset of "0" */ .kind = BPF_CORE_TYPE_ID_LOCAL, } }; union bpf_attr attr = { .prog_name = "foo", .prog_type = BPF_TRACE_RAW_TP, .license = (__u64)"GPL", .insns = (__u64)&insns, .insn_cnt = sizeof(insns) / sizeof(*insns), .log_buf = (__u64)log, .log_size = sizeof(log), .log_level = log_level, .func_info = (__u64)funcs, .func_info_cnt = sizeof(funcs) / sizeof(*funcs), .func_info_rec_size = sizeof(*funcs), .core_relos = (__u64)relos, .core_relo_cnt = sizeof(relos) / sizeof(*relos), .core_relo_rec_size = sizeof(*relos), }; int saved_errno; int prog_fd = -1; int btf_fd = -1; btf_fd = bpf_btf_load(&raw_btf, sizeof(raw_btf), &opts); saved_errno = errno; if (btf_fd < 0 || env.verbosity > VERBOSE_NORMAL) { printf("-------- BTF load log start --------\n"); printf("%s", log); printf("-------- BTF load log end ----------\n"); } if (btf_fd < 0) { PRINT_FAIL("bpf_btf_load() failed, errno=%d\n", saved_errno); return; } memset(log, 0, sizeof(log)); attr.prog_btf_fd = btf_fd; prog_fd = sys_bpf_prog_load(&attr, sizeof(attr), 1); saved_errno = errno; if (prog_fd < 0 || env.verbosity > VERBOSE_NORMAL) { printf("-------- program load log start --------\n"); printf("%s", log); printf("-------- program load log end ----------\n"); } if (prog_fd > 0) { PRINT_FAIL("sys_bpf_prog_load() expected to fail\n"); goto out; } ASSERT_HAS_SUBSTR(log, "relo #0: bad type id 100500", "program load log"); out: close(prog_fd); close(btf_fd); } void test_core_reloc_raw(void) { if (test__start_subtest("bad_local_id")) test_bad_local_id(); }