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=ham 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 BD8F6C433DB for ; Fri, 22 Jan 2021 07:49:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 83634230F9 for ; Fri, 22 Jan 2021 07:49:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727116AbhAVHtO (ORCPT ); Fri, 22 Jan 2021 02:49:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727080AbhAVHsc (ORCPT ); Fri, 22 Jan 2021 02:48:32 -0500 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 395C2C06178B; Thu, 21 Jan 2021 23:47:52 -0800 (PST) Received: by mail-pl1-x62b.google.com with SMTP id d4so2746736plh.5; Thu, 21 Jan 2021 23:47:52 -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=2f4Z8/X0T/fhTOe0f0NrYDSzCcAlfc8vWQF5Ib6JvJk=; b=EQzM8gSk3GM8af300Bc+L03Vz5sCX/uyWXZXmgu77RHtJdFdcUqfKecEkvM4vwKgjO wUXCt/ntZr5o3IDjlx/4oa7oWxOykloJs2hizayvrGetPTlqOvVzK9fuD9wTynM3Zchl 5TRh/tma6vCmCfAcGz6b+Rc3BFxAcNmgm49TtaJzmoqvZvRM/DUnPHHs0dLZjdd2W2l+ 9iFZDRRRsokkm86ZbVCUNqcDY++Y/7TJb25itNs9snARWcG1WbESkfpxRvK5mQknCc3B b9Pep11Br0DGuFkuVAk+N+gMDW5T4ub/WUgtaArkFsQwbCoAT30uMchBwoyK5alQsFMx /WyQ== 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=2f4Z8/X0T/fhTOe0f0NrYDSzCcAlfc8vWQF5Ib6JvJk=; b=R2LJhqVp1XBn6K3gHxHmQpLg3du4AqnhKhOOOIePsc9RffN99En4ujcMwt0EP1fFcl 5wZorSpyfzig2LeRAZxt2ywfUnTyTk3bjGeJp8hsrXOHfN24Rsa4bRu4EW0RKVsOv5xs o5GtUmY0fAMC5cutI7S1UD0qIRw1IAA/6lOW5gAQq96BGXZ2Y41mhDQowzn3tr5z5TNV ZFiPBzv48k3W9anHsjfaZjIgk5bbSsNZaKVysp5yagJijFmbMmhrJ+Drnr7ThO1WLl2C saGw5UbeTJM9DEmLAUy6G9A7QDERU6NMY0y6SI1LdfXfC+Hia/o+9adi+0bQt+V6Qj5S rJwA== X-Gm-Message-State: AOAM531iT51UDmvPIAeJBEkVMRFS9Szk9TzyvGFPFrg10TjFFpYwXRy5 CCp4wZJljxRpjQIxmiUwo8hR9yDkmb2kcQ== X-Google-Smtp-Source: ABdhPJzfdCQp2x/XzRXQyaCXba2zUs/Fx6uqjtmRtsmKRIDm50bfnFGQv017cSrNCwqQRPJelw5rcw== X-Received: by 2002:a17:90a:7142:: with SMTP id g2mr3966705pjs.92.1611301671598; Thu, 21 Jan 2021 23:47:51 -0800 (PST) Received: from Leo-laptop-t470s.redhat.com ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id 145sm8081384pge.88.2021.01.21.23.47.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Jan 2021 23:47:51 -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: [PATCHv16 bpf-next 5/6] selftests/bpf: Add verifier tests for bpf arg ARG_CONST_MAP_PTR_OR_NULL Date: Fri, 22 Jan 2021 15:46:51 +0800 Message-Id: <20210122074652.2981711-6-liuhangbin@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210122074652.2981711-1-liuhangbin@gmail.com> References: <20210120022514.2862872-1-liuhangbin@gmail.com> <20210122074652.2981711-1-liuhangbin@gmail.com> MIME-Version: 1.0 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 Signed-off-by: Hangbin Liu --- tools/testing/selftests/bpf/test_verifier.c | 21 +++++- .../testing/selftests/bpf/verifier/map_ptr.c | 70 +++++++++++++++++++ 2 files changed, 90 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index 59bfa6201d1d..15f83ca8288a 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)); @@ -898,6 +902,21 @@ static void do_test_fixup(struct bpf_test *test, enum bpf_prog_type prog_type, prog[*fixup_map_ringbuf].imm = map_fds[20]; 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); } } 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