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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4C58C43334 for ; Fri, 15 Jul 2022 05:32:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229703AbiGOFcD convert rfc822-to-8bit (ORCPT ); Fri, 15 Jul 2022 01:32:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229468AbiGOFcB (ORCPT ); Fri, 15 Jul 2022 01:32:01 -0400 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67F9E79EE9 for ; Thu, 14 Jul 2022 22:32:01 -0700 (PDT) Received: from pps.filterd (m0044010.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 26ENcaKn000962 for ; Thu, 14 Jul 2022 22:32:01 -0700 Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3haktc5950-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 14 Jul 2022 22:32:01 -0700 Received: from twshared5413.23.frc3.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Thu, 14 Jul 2022 22:31:59 -0700 Received: by devbig019.vll3.facebook.com (Postfix, from userid 137359) id 8F4E11C5C5904; Thu, 14 Jul 2022 22:31:55 -0700 (PDT) From: Andrii Nakryiko To: , , CC: , Subject: [PATCH v2 bpf-next 4/4] selftests/bpf: validate .bss section bigger than 8MB is possible now Date: Thu, 14 Jul 2022 22:31:46 -0700 Message-ID: <20220715053146.1291891-5-andrii@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220715053146.1291891-1-andrii@kernel.org> References: <20220715053146.1291891-1-andrii@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: Z_RqN4_bk9mwdm5SzqBaU4-lIVV8NJng X-Proofpoint-ORIG-GUID: Z_RqN4_bk9mwdm5SzqBaU4-lIVV8NJng X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-07-15_02,2022-07-14_01,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Add a simple big 16MB array and validate access to the very last byte of it to make sure that kernel supports > KMALLOC_MAX_SIZE value_size for BPF array maps (which are backing .bss in this case). Signed-off-by: Andrii Nakryiko --- tools/testing/selftests/bpf/prog_tests/skeleton.c | 2 ++ tools/testing/selftests/bpf/progs/test_skeleton.c | 4 ++++ 2 files changed, 6 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/skeleton.c b/tools/testing/selftests/bpf/prog_tests/skeleton.c index 180afd632f4c..99dac5292b41 100644 --- a/tools/testing/selftests/bpf/prog_tests/skeleton.c +++ b/tools/testing/selftests/bpf/prog_tests/skeleton.c @@ -122,6 +122,8 @@ void test_skeleton(void) ASSERT_EQ(skel->bss->out_mostly_var, 123, "out_mostly_var"); + ASSERT_EQ(bss->huge_arr[ARRAY_SIZE(bss->huge_arr) - 1], 123, "huge_arr"); + elf_bytes = test_skeleton__elf_bytes(&elf_bytes_sz); ASSERT_OK_PTR(elf_bytes, "elf_bytes"); ASSERT_GE(elf_bytes_sz, 0, "elf_bytes_sz"); diff --git a/tools/testing/selftests/bpf/progs/test_skeleton.c b/tools/testing/selftests/bpf/progs/test_skeleton.c index 1b1187d2967b..1a4e93f6d9df 100644 --- a/tools/testing/selftests/bpf/progs/test_skeleton.c +++ b/tools/testing/selftests/bpf/progs/test_skeleton.c @@ -51,6 +51,8 @@ int out_dynarr[4] SEC(".data.dyn") = { 1, 2, 3, 4 }; int read_mostly_var __read_mostly; int out_mostly_var; +char huge_arr[16 * 1024 * 1024]; + SEC("raw_tp/sys_enter") int handler(const void *ctx) { @@ -71,6 +73,8 @@ int handler(const void *ctx) out_mostly_var = read_mostly_var; + huge_arr[sizeof(huge_arr) - 1] = 123; + return 0; } -- 2.30.2