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=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 C9DABC4360C for ; Fri, 4 Oct 2019 13:26:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 84186207FF for ; Fri, 4 Oct 2019 13:26:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="u75M3iFy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 84186207FF Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 342AA6B000A; Fri, 4 Oct 2019 09:26:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2F41A8E0005; Fri, 4 Oct 2019 09:26:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1E32A6B000D; Fri, 4 Oct 2019 09:26:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0142.hostedemail.com [216.40.44.142]) by kanga.kvack.org (Postfix) with ESMTP id 01A586B000A for ; Fri, 4 Oct 2019 09:26:07 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 873D82DFB for ; Fri, 4 Oct 2019 13:26:07 +0000 (UTC) X-FDA: 76006175574.11.power60_5284bc40e874b X-HE-Tag: power60_5284bc40e874b X-Filterd-Recvd-Size: 4562 Received: from mail-vk1-f202.google.com (mail-vk1-f202.google.com [209.85.221.202]) by imf24.hostedemail.com (Postfix) with ESMTP for ; Fri, 4 Oct 2019 13:26:06 +0000 (UTC) Received: by mail-vk1-f202.google.com with SMTP id 70so2617794vki.19 for ; Fri, 04 Oct 2019 06:26:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=GWlYpnS2hNFrsmeeImnsTlnodR5FcAicQUn+gpn41So=; b=u75M3iFyHxY2l+lvcWD5ax+LgH7eSKoGg5Hq64aRsm4ffslEyEPzzpkQDRDgJuS3zJ wYFBb1iENWoGX7MR1muFp3riMwAPVpPCqEXqU880Q1tHkv66/ZabS1rxt0q3YHY8w7S9 7qtD2FEDbfjoRk7esXGfQQ8/8mVHfCaGBuZO/xYZc64AHsxdVQ2+4Pzeb0IZQ/WNhe9w KFcfSh4QJBFuzk7iTL3IIQIyQRLnAMBMxNwXGp89pJJyard6+wfzNhjmF9zk4EjqIPOq LCk+/U6xR1me4dLTDdbfdmADOD2gbSTMnFIBx9jM6K507PHcd8YHXP/MmcJyFTlGbNo8 nRFA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=GWlYpnS2hNFrsmeeImnsTlnodR5FcAicQUn+gpn41So=; b=SO4i0qQDxzvlZ6NUZ2HUxzpim4k6JHbw3Uu4mYVN/dSjXJV7dwUOIheTCEOfwCdvIR /Md0IYVDBqEvsVdtbRCiPaptZu59H4HzM4dvWDkjMp6qKQQdVUjPKavXKDI+nh6/AIdr QbHqOHyViHy7A4Eai8BIctGPQ0zIYcS5Fyhc/sVy7zXWgTxANhS30MrlkO/HmFRHfJCp dcDyaf2bPB0rpGlpvRLf9s7vUcX8deHJScqMMBBlvlB+9vPDDk9Ab2KneMqdXKwXPcXI ZvDOLBAGeoaR45iLE7U8NoDKgd203uEIz6SF6QU5RM6amPMFL31R4ExN1aPceVja3vBa oniQ== X-Gm-Message-State: APjAAAUJ5nQ8hD8VZz8DMZFq1u17kc8wtqRPDpKwEMQcjNXX3leqtRYs 9JGlpJBL6d9VpiCncdGqD4YrriTA+uk= X-Google-Smtp-Source: APXvYqyDRmK5S8c3gaI8EpnXE6TNfIWQuNU8VFYCXMa0lctyNLV9CLLAW218TuV0cLdfpX30HrNaF0j643E= X-Received: by 2002:ac5:cc4a:: with SMTP id l10mr2655269vkm.60.1570195566177; Fri, 04 Oct 2019 06:26:06 -0700 (PDT) Date: Fri, 4 Oct 2019 15:25:55 +0200 In-Reply-To: <20191004132555.202973-1-glider@google.com> Message-Id: <20191004132555.202973-2-glider@google.com> Mime-Version: 1.0 References: <20191004132555.202973-1-glider@google.com> X-Mailer: git-send-email 2.23.0.581.g78d2f28ef7-goog Subject: [PATCH v1 2/2] lib/test_meminit: add a kmem_cache_alloc_bulk() test From: Alexander Potapenko To: Andrew Morton , Christoph Lameter Cc: Alexander Potapenko , Kees Cook , linux-mm@kvack.org, kernel-hardening@lists.openwall.com Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Make sure allocations from kmem_cache_alloc_bulk()/kmem_cache_free_bulk() are properly initialized. Signed-off-by: Alexander Potapenko Cc: Kees Cook To: Andrew Morton To: Christoph Lameter Cc: linux-mm@kvack.org Cc: kernel-hardening@lists.openwall.com --- lib/test_meminit.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/lib/test_meminit.c b/lib/test_meminit.c index 9729f271d150..9742e5cb853a 100644 --- a/lib/test_meminit.c +++ b/lib/test_meminit.c @@ -297,6 +297,32 @@ static int __init do_kmem_cache_rcu_persistent(int size, int *total_failures) return 1; } +static int __init do_kmem_cache_size_bulk(int size, int *total_failures) +{ + struct kmem_cache *c; + int i, iter, maxiter = 1024; + int num, bytes; + bool fail = false; + void *objects[10]; + + c = kmem_cache_create("test_cache", size, size, 0, NULL); + for (iter = 0; (iter < maxiter) && !fail; iter++) { + num = kmem_cache_alloc_bulk(c, GFP_KERNEL, ARRAY_SIZE(objects), + objects); + for (i = 0; i < num; i++) { + bytes = count_nonzero_bytes(objects[i], size); + if (bytes) + fail = true; + fill_with_garbage(objects[i], size); + } + + if (num) + kmem_cache_free_bulk(c, num, objects); + } + *total_failures += fail; + return 1; +} + /* * Test kmem_cache allocation by creating caches of different sizes, with and * without constructors, with and without SLAB_TYPESAFE_BY_RCU. @@ -318,6 +344,7 @@ static int __init test_kmemcache(int *total_failures) num_tests += do_kmem_cache_size(size, ctor, rcu, zero, &failures); } + num_tests += do_kmem_cache_size_bulk(size, &failures); } REPORT_FAILURES_IN_FN(); *total_failures += failures; -- 2.23.0.581.g78d2f28ef7-goog