From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1F9DC433DB for ; Tue, 26 Jan 2021 19:43:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6C74E21707 for ; Tue, 26 Jan 2021 19:43:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728463AbhAZFgj (ORCPT ); Tue, 26 Jan 2021 00:36:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728531AbhAYNAH (ORCPT ); Mon, 25 Jan 2021 08:00:07 -0500 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1E37C061220; Mon, 25 Jan 2021 04:46:56 -0800 (PST) Received: by mail-pl1-x636.google.com with SMTP id u11so7496664plg.13; Mon, 25 Jan 2021 04:46:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=gdNmPdxUmYXmpanLY0cVXFvx8xelpcilD2CBI4YbGkg=; b=XFVwEwDEXsF3lklsSHi3KroBlUsZOL8Xni9rWKjis+qVoIG1YQoC2B4NB6DwE2LqdK 9iIl17zAaRwChRpel5zyUb5O/mhGP+xDA1UqB5fqfcLPthK4ckI5VgEnqKIsPadStb+M YCGCbi9WatqqeVO4QjVpoeD4H6pP+HGUgXPwEqqXyAR8S1YTPLN8MUBvPgI+pt54X78S 4mi1LyUazCOtfJjn/ncLxxair7aKBPz+bcEhDueyybyW4AKjvfV9fv78ApoK7aRabGUP P4Q+fh/sc++Ko/4gJlUZrt2bMEW9VLL17aYVf4kAckc9Yoyul2hQfIcd0w0R932EKrQC 8ecg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=gdNmPdxUmYXmpanLY0cVXFvx8xelpcilD2CBI4YbGkg=; b=YgwxU66lX+9bX1BChhh6qMF9vwI2TSt5PHC8CmVCdKxM4XKNAhxDKw9Ecev9kz8psn axqUihmvypXr8z2eEushRKB4y/sRgm3OnYrHWN3mvOPWYPLJ/k32Wtdid1eobcfoX2jQ 49pnaAVrVx0SsWxjkEEggmkNYJDlSgnFucFyGQM1bfH9okvmSMQpmB7HacwUY2zVMt4L ve174HYsjp6C+mLGy9iggmc7mF7vXHEEWSBeryQTbVxNCfD6HRr0vgCzYko6hpZCwPd/ GGOizLhW3mClaWalcCe8Iays/NRWlWAgMlntR1AVORtL3yJKBzs8078PizDJLMLc7VYE ZsTQ== X-Gm-Message-State: AOAM532Y0vsZeoXGf6Pnv1qIFXlSoXP/b5uGp31Is/nlOmBg/MQ6lruF 3H2WsvNKCzCSZdHs2LSeaPKzBkEekrIGXnP/ X-Google-Smtp-Source: ABdhPJwhw7oLpNNA8dJgidbaYJCaoUvRI6oUP7qfxVBMLBf9ckPtnXUSaDxrBdvOmSLIDvzbd7VdOA== X-Received: by 2002:a17:902:ea94:b029:df:edfe:fac3 with SMTP id x20-20020a170902ea94b02900dfedfefac3mr209714plb.61.1611578816010; Mon, 25 Jan 2021 04:46:56 -0800 (PST) Received: from Leo-laptop-t470s.redhat.com ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id j123sm17815466pfg.36.2021.01.25.04.46.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Jan 2021 04:46:55 -0800 (PST) From: Hangbin Liu To: bpf@vger.kernel.org Cc: netdev@vger.kernel.org, =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= , Jiri Benc , Jesper Dangaard Brouer , Eelco Chaudron , ast@kernel.org, Daniel Borkmann , Lorenzo Bianconi , David Ahern , Andrii Nakryiko , Alexei Starovoitov , John Fastabend , Maciej Fijalkowski , Hangbin Liu Subject: [PATCHv17 bpf-next 5/6] selftests/bpf: Add verifier tests for bpf arg ARG_CONST_MAP_PTR_OR_NULL Date: Mon, 25 Jan 2021 20:45:15 +0800 Message-Id: <20210125124516.3098129-6-liuhangbin@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210125124516.3098129-1-liuhangbin@gmail.com> References: <20210122074652.2981711-1-liuhangbin@gmail.com> <20210125124516.3098129-1-liuhangbin@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Use helper bpf_redirect_map() and bpf_redirect_map_multi() to test bpf arg ARG_CONST_MAP_PTR and ARG_CONST_MAP_PTR_OR_NULL. Make sure the map arg could be verified correctly when it is NULL or valid map pointer. Add devmap and devmap_hash in struct bpf_test due to bpf_redirect_{map, map_multi} limit. Test result: ]# ./test_verifier 713 716 #713/p ARG_CONST_MAP_PTR: null pointer OK #714/p ARG_CONST_MAP_PTR: valid map pointer OK #715/p ARG_CONST_MAP_PTR_OR_NULL: null pointer for ex_map OK #716/p ARG_CONST_MAP_PTR_OR_NULL: valid map pointer for ex_map OK Summary: 4 PASSED, 0 SKIPPED, 0 FAILED Acked-by: Toke Høiland-Jørgensen Signed-off-by: Hangbin Liu --- tools/testing/selftests/bpf/test_verifier.c | 22 +++++- .../testing/selftests/bpf/verifier/map_ptr.c | 70 +++++++++++++++++++ 2 files changed, 91 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index 59bfa6201d1d..c0e10a6f1911 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -50,7 +50,7 @@ #define MAX_INSNS BPF_MAXINSNS #define MAX_TEST_INSNS 1000000 #define MAX_FIXUPS 8 -#define MAX_NR_MAPS 21 +#define MAX_NR_MAPS 23 #define MAX_TEST_RUNS 8 #define POINTER_VALUE 0xcafe4all #define TEST_DATA_LEN 64 @@ -88,6 +88,8 @@ struct bpf_test { int fixup_map_event_output[MAX_FIXUPS]; int fixup_map_reuseport_array[MAX_FIXUPS]; int fixup_map_ringbuf[MAX_FIXUPS]; + int fixup_map_devmap[MAX_FIXUPS]; + int fixup_map_devmap_hash[MAX_FIXUPS]; const char *errstr; const char *errstr_unpriv; uint32_t insn_processed; @@ -714,6 +716,8 @@ static void do_test_fixup(struct bpf_test *test, enum bpf_prog_type prog_type, int *fixup_map_event_output = test->fixup_map_event_output; int *fixup_map_reuseport_array = test->fixup_map_reuseport_array; int *fixup_map_ringbuf = test->fixup_map_ringbuf; + int *fixup_map_devmap = test->fixup_map_devmap; + int *fixup_map_devmap_hash = test->fixup_map_devmap_hash; if (test->fill_helper) { test->fill_insns = calloc(MAX_TEST_INSNS, sizeof(struct bpf_insn)); @@ -899,6 +903,22 @@ static void do_test_fixup(struct bpf_test *test, enum bpf_prog_type prog_type, fixup_map_ringbuf++; } while (*fixup_map_ringbuf); } + if (*fixup_map_devmap) { + map_fds[20] = __create_map(BPF_MAP_TYPE_DEVMAP, + sizeof(u32), sizeof(u32), 1, 0); + do { + prog[*fixup_map_devmap].imm = map_fds[20]; + fixup_map_devmap++; + } while (*fixup_map_devmap); + } + if (*fixup_map_devmap_hash) { + map_fds[21] = __create_map(BPF_MAP_TYPE_DEVMAP_HASH, + sizeof(u32), sizeof(u32), 1, 0); + do { + prog[*fixup_map_devmap_hash].imm = map_fds[21]; + fixup_map_devmap_hash++; + } while (*fixup_map_devmap_hash); + } } struct libcap { diff --git a/tools/testing/selftests/bpf/verifier/map_ptr.c b/tools/testing/selftests/bpf/verifier/map_ptr.c index b117bdd3806d..1a532198c9c1 100644 --- a/tools/testing/selftests/bpf/verifier/map_ptr.c +++ b/tools/testing/selftests/bpf/verifier/map_ptr.c @@ -93,3 +93,73 @@ .fixup_map_hash_16b = { 4 }, .result = ACCEPT, }, +{ + "ARG_CONST_MAP_PTR: null pointer", + .insns = { + /* bpf_redirect_map arg1 (map) */ + BPF_MOV64_IMM(BPF_REG_1, 0), + /* bpf_redirect_map arg2 (ifindex) */ + BPF_MOV64_IMM(BPF_REG_2, 0), + /* bpf_redirect_map arg3 (flags) */ + BPF_MOV64_IMM(BPF_REG_3, 0), + BPF_EMIT_CALL(BPF_FUNC_redirect_map), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .prog_type = BPF_PROG_TYPE_XDP, + .errstr = "R1 type=inv expected=map_ptr", +}, +{ + "ARG_CONST_MAP_PTR: valid map pointer", + .insns = { + BPF_MOV64_IMM(BPF_REG_1, 0), + /* bpf_redirect_map arg1 (map) */ + BPF_LD_MAP_FD(BPF_REG_1, 0), + /* bpf_redirect_map arg2 (ifindex) */ + BPF_MOV64_IMM(BPF_REG_2, 0), + /* bpf_redirect_map arg3 (flags) */ + BPF_MOV64_IMM(BPF_REG_3, 0), + BPF_EMIT_CALL(BPF_FUNC_redirect_map), + BPF_EXIT_INSN(), + }, + .fixup_map_devmap = { 1 }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_XDP, +}, +{ + "ARG_CONST_MAP_PTR_OR_NULL: null pointer for ex_map", + .insns = { + BPF_MOV64_IMM(BPF_REG_1, 0), + /* bpf_redirect_map_multi arg1 (in_map) */ + BPF_LD_MAP_FD(BPF_REG_1, 0), + /* bpf_redirect_map_multi arg2 (ex_map) */ + BPF_MOV64_IMM(BPF_REG_2, 0), + /* bpf_redirect_map_multi arg3 (flags) */ + BPF_MOV64_IMM(BPF_REG_3, 0), + BPF_EMIT_CALL(BPF_FUNC_redirect_map_multi), + BPF_EXIT_INSN(), + }, + .fixup_map_devmap = { 1 }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_XDP, + .retval = 4, +}, +{ + "ARG_CONST_MAP_PTR_OR_NULL: valid map pointer for ex_map", + .insns = { + BPF_MOV64_IMM(BPF_REG_1, 0), + /* bpf_redirect_map_multi arg1 (in_map) */ + BPF_LD_MAP_FD(BPF_REG_1, 0), + /* bpf_redirect_map_multi arg2 (ex_map) */ + BPF_LD_MAP_FD(BPF_REG_2, 1), + /* bpf_redirect_map_multi arg3 (flags) */ + BPF_MOV64_IMM(BPF_REG_3, 0), + BPF_EMIT_CALL(BPF_FUNC_redirect_map_multi), + BPF_EXIT_INSN(), + }, + .fixup_map_devmap = { 1 }, + .fixup_map_devmap_hash = { 3 }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_XDP, + .retval = 4, +}, -- 2.26.2