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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 69338C3A59F for ; Fri, 30 Aug 2019 00:39:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3887721670 for ; Fri, 30 Aug 2019 00:39:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=axtens.net header.i=@axtens.net header.b="rC80CM3v" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727351AbfH3AjL (ORCPT ); Thu, 29 Aug 2019 20:39:11 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:38672 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725826AbfH3AjK (ORCPT ); Thu, 29 Aug 2019 20:39:10 -0400 Received: by mail-pf1-f194.google.com with SMTP id o70so3321341pfg.5 for ; Thu, 29 Aug 2019 17:39:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axtens.net; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=HNDV9DT7O32N2h9l7CrACdWJSzNVfR3Dv9pnUT55kOg=; b=rC80CM3vg5AM+oCtr2yGiOMkyFX3PwyWe/XtNpAWG+HqpbnDeR7304D9UdEPGcbG1z p5Wwn/tzrFn8wuMCtE+W9itdoK1VA57nvODNtfU9ort+tqudg9czalidTRlConko7Q9N ZCj2Wv+K+wlO0ZT2El8qdKr16hfYxsr077kTU= 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=HNDV9DT7O32N2h9l7CrACdWJSzNVfR3Dv9pnUT55kOg=; b=NetYKKxU52MFAHZl61r1JMaPxl/j0XyYK5pdXpL4nB8n3cXCqy2kDmtoRWVzGUCSj8 MsAb/hhpz7uvWxzS3yNatnN7MoHUWm+yTgTgTgHPdzhYplRdLuXzVVXzLcCQoWLm8Z46 iXQoLLZy/q9x48+AcQPw0y6OXE2hwFe7h6dGBcUx2xlQrWiss2b1OdSY5GnpK3jvb0xg hzbkCvd0GGqFVK/fLccRlBzBd24OPlRVFwit0G/3SXtDCzdK/T9MjxxbXLgTji01II+0 fYmWTKy6W94+qhRYvbVf1j5PDwnjUEN0oAi1yhWZiOvevAqaQXkR40kyrQDJxCfOSqBj LAqQ== X-Gm-Message-State: APjAAAW3sQIH5cdCTTwSYrOMs2Bm8uu4Pmu9aVaBPKUv+sRmXUh4J/Y5 g3IjSVgoKOiyQELRDxSm31sE7Q== X-Google-Smtp-Source: APXvYqxf40ssvyv4OlvQVqWJJ70xy4S4K17zZEo3u0JMMATs1HkRt9dCDVYyGh/84sHT3v5sSG1DHw== X-Received: by 2002:a63:a66:: with SMTP id z38mr11066655pgk.247.1567125550257; Thu, 29 Aug 2019 17:39:10 -0700 (PDT) Received: from localhost (ppp167-251-205.static.internode.on.net. [59.167.251.205]) by smtp.gmail.com with ESMTPSA id i4sm2211255pfd.168.2019.08.29.17.39.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Aug 2019 17:39:09 -0700 (PDT) From: Daniel Axtens To: kasan-dev@googlegroups.com, linux-mm@kvack.org, x86@kernel.org, aryabinin@virtuozzo.com, glider@google.com, luto@kernel.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, dvyukov@google.com, christophe.leroy@c-s.fr Cc: linuxppc-dev@lists.ozlabs.org, gor@linux.ibm.com, Daniel Axtens Subject: [PATCH v5 2/5] kasan: add test for vmalloc Date: Fri, 30 Aug 2019 10:38:18 +1000 Message-Id: <20190830003821.10737-3-dja@axtens.net> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190830003821.10737-1-dja@axtens.net> References: <20190830003821.10737-1-dja@axtens.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Test kasan vmalloc support by adding a new test to the module. Signed-off-by: Daniel Axtens -- v5: split out per Christophe Leroy --- lib/test_kasan.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index 49cc4d570a40..328d33beae36 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -19,6 +19,7 @@ #include #include #include +#include #include @@ -748,6 +749,30 @@ static noinline void __init kmalloc_double_kzfree(void) kzfree(ptr); } +#ifdef CONFIG_KASAN_VMALLOC +static noinline void __init vmalloc_oob(void) +{ + void *area; + + pr_info("vmalloc out-of-bounds\n"); + + /* + * We have to be careful not to hit the guard page. + * The MMU will catch that and crash us. + */ + area = vmalloc(3000); + if (!area) { + pr_err("Allocation failed\n"); + return; + } + + ((volatile char *)area)[3100]; + vfree(area); +} +#else +static void __init vmalloc_oob(void) {} +#endif + static int __init kmalloc_tests_init(void) { /* @@ -793,6 +818,7 @@ static int __init kmalloc_tests_init(void) kasan_strings(); kasan_bitops(); kmalloc_double_kzfree(); + vmalloc_oob(); kasan_restore_multi_shot(multishot); -- 2.20.1