From patchwork Sat Oct 30 09:30:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Yingliang X-Patchwork-Id: 12594241 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B154C433EF for ; Sat, 30 Oct 2021 09:23:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DBE9360F3A for ; Sat, 30 Oct 2021 09:23:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231830AbhJ3JZg (ORCPT ); Sat, 30 Oct 2021 05:25:36 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:26213 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231829AbhJ3JZg (ORCPT ); Sat, 30 Oct 2021 05:25:36 -0400 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.53]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4HhDM7049Qz8tjw; Sat, 30 Oct 2021 17:21:39 +0800 (CST) Received: from dggpeml500017.china.huawei.com (7.185.36.243) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.15; Sat, 30 Oct 2021 17:23:03 +0800 Received: from huawei.com (10.175.103.91) by dggpeml500017.china.huawei.com (7.185.36.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.15; Sat, 30 Oct 2021 17:23:03 +0800 From: Yang Yingliang To: , CC: , , Subject: [PATCH -next] bpf/benchs: Fix return value check of bpf_program__attach() Date: Sat, 30 Oct 2021 17:30:51 +0800 Message-ID: <20211030093051.2609665-1-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpeml500017.china.huawei.com (7.185.36.243) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net If bpf_program__attach() fails, it never returns NULL, we should use libbpf_get_error() to check the return value. Reported-by: Hulk Robot Signed-off-by: Yang Yingliang Acked-by: Yonghong Song --- .../bpf/benchs/bench_bloom_filter_map.c | 20 ++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/bpf/benchs/bench_bloom_filter_map.c b/tools/testing/selftests/bpf/benchs/bench_bloom_filter_map.c index 6eeeed2913e6..6879340b20c4 100644 --- a/tools/testing/selftests/bpf/benchs/bench_bloom_filter_map.c +++ b/tools/testing/selftests/bpf/benchs/bench_bloom_filter_map.c @@ -296,6 +296,7 @@ static struct bloom_filter_bench *setup_skeleton(void) static void bloom_lookup_setup(void) { struct bpf_link *link; + int err; ctx.use_array_map = true; @@ -304,7 +305,8 @@ static void bloom_lookup_setup(void) populate_maps(); link = bpf_program__attach(ctx.skel->progs.bloom_lookup); - if (!link) { + err = libbpf_get_error(link); + if (err) { fprintf(stderr, "failed to attach program!\n"); exit(1); } @@ -313,6 +315,7 @@ static void bloom_lookup_setup(void) static void bloom_update_setup(void) { struct bpf_link *link; + int err; ctx.use_array_map = true; @@ -321,7 +324,8 @@ static void bloom_update_setup(void) populate_maps(); link = bpf_program__attach(ctx.skel->progs.bloom_update); - if (!link) { + err = libbpf_get_error(link); + if (err) { fprintf(stderr, "failed to attach program!\n"); exit(1); } @@ -330,6 +334,7 @@ static void bloom_update_setup(void) static void false_positive_setup(void) { struct bpf_link *link; + int err; ctx.use_hashmap = true; ctx.hashmap_use_bloom = true; @@ -340,7 +345,8 @@ static void false_positive_setup(void) populate_maps(); link = bpf_program__attach(ctx.skel->progs.bloom_hashmap_lookup); - if (!link) { + err = libbpf_get_error(link); + if (err) { fprintf(stderr, "failed to attach program!\n"); exit(1); } @@ -349,6 +355,7 @@ static void false_positive_setup(void) static void hashmap_with_bloom_setup(void) { struct bpf_link *link; + int err; ctx.use_hashmap = true; ctx.hashmap_use_bloom = true; @@ -358,7 +365,8 @@ static void hashmap_with_bloom_setup(void) populate_maps(); link = bpf_program__attach(ctx.skel->progs.bloom_hashmap_lookup); - if (!link) { + err = libbpf_get_error(link); + if (err) { fprintf(stderr, "failed to attach program!\n"); exit(1); } @@ -367,6 +375,7 @@ static void hashmap_with_bloom_setup(void) static void hashmap_no_bloom_setup(void) { struct bpf_link *link; + int err; ctx.use_hashmap = true; @@ -375,7 +384,8 @@ static void hashmap_no_bloom_setup(void) populate_maps(); link = bpf_program__attach(ctx.skel->progs.bloom_hashmap_lookup); - if (!link) { + err = libbpf_get_error(link); + if (err) { fprintf(stderr, "failed to attach program!\n"); exit(1); }