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,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable 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 7E384C606C2 for ; Mon, 8 Jul 2019 17:09:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5099A21479 for ; Mon, 8 Jul 2019 17:09:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="PgglRjVj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403830AbfGHRJM (ORCPT ); Mon, 8 Jul 2019 13:09:12 -0400 Received: from mail-yw1-f74.google.com ([209.85.161.74]:56299 "EHLO mail-yw1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390600AbfGHRJF (ORCPT ); Mon, 8 Jul 2019 13:09:05 -0400 Received: by mail-yw1-f74.google.com with SMTP id n139so7669238ywd.22 for ; Mon, 08 Jul 2019 10:09:04 -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=/Bjb3ErsQTLw+YrlSLkjBcr6K+fvu3f9fORDBwR/vbU=; b=PgglRjVjhE72uthaYPgUkIA+L8Ic1IQKCjcb8XRTj87DCO10kaCcE306+6CbVNMvau SM1ka9Ic90hEIZxLQuIrW1jY3Vm6ESsEkj4IYF0TQ3+Fb38HOfRfZ6jc+goC1Vp402VA kMjKtNquIeLszR/h3t7e1dLItihhLNJ7YiN1g5fRoFKUsgOzwMwZ8toOK/16ArpBe9tF grBf339F217k5k/S6+fB3KbnXoO2Q0m6y/mS9TLUd2/nhXEGmHLG7x/xDi7tzYoCXGpA afNpmmQHXf9ZbTj7qJiAD426/t1VpxFKdDNos9FKE3egTSIsrvnwFas4LujNH5/S9+iA q5IA== 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=/Bjb3ErsQTLw+YrlSLkjBcr6K+fvu3f9fORDBwR/vbU=; b=jKsmA5FEfQQUWUAR5LhRDTqH8+8jCkGHKv2p7W687BMg9tdui23ClJ1BEt2AegTD3g U7qpm4c6RkAnlvo470gaKTR+MioRTL+pMqILkG3bn7HbHoBMKfg5sso1o18houiopMDe 5i33bgODTEg+qu55ioKWmCXVccdutXkkZ0IHBN5oXdOcvP4vbCWqevRa7rtMM811uF9I NiQhEE+h3A+P1pGRhfLW8b6qqnY04I9rljzWNPJOII6sNaUOsXBSUuDQrlrSG6U9RgCY 4DETAx8v1yICjSXzu9PPlxJcTaCSW63zXATtHJJPnk1LuZ1BKkwHvqZ1PYrJNQ8C1cuW FWVg== X-Gm-Message-State: APjAAAUlrLaL7OVdYnYURz+Ru6EjN4rG+JQXKbb/+mWsVG3c8S75nK5z oTwwNZQFh45sglKLxHWpGGJDh9jswQ== X-Google-Smtp-Source: APXvYqxP+FPSf7rO7/ibi5Fz8cPbpk061VoEiwZkeVQq8DuTHnSF07hV2+HQ/wDAVE8vywm9H1aztfDkIA== X-Received: by 2002:a81:a95:: with SMTP id 143mr12306291ywk.279.1562605743974; Mon, 08 Jul 2019 10:09:03 -0700 (PDT) Date: Mon, 8 Jul 2019 19:07:05 +0200 In-Reply-To: <20190708170706.174189-1-elver@google.com> Message-Id: <20190708170706.174189-4-elver@google.com> Mime-Version: 1.0 References: <20190708170706.174189-1-elver@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v5 3/5] lib/test_kasan: Add test for double-kzfree detection From: Marco Elver To: elver@google.com Cc: linux-kernel@vger.kernel.org, Andrey Ryabinin , Dmitry Vyukov , Alexander Potapenko , Andrey Konovalov , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , Mark Rutland , kasan-dev@googlegroups.com, linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adds a simple test that checks if double-kzfree is being detected correctly. Signed-off-by: Marco Elver Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Alexander Potapenko Cc: Andrey Konovalov Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Cc: Andrew Morton Cc: Mark Rutland Cc: kasan-dev@googlegroups.com Cc: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org --- lib/test_kasan.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index e3c593c38eff..dda5da9f5bd4 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -619,6 +619,22 @@ static noinline void __init kasan_strings(void) strnlen(ptr, 1); } +static noinline void __init kmalloc_double_kzfree(void) +{ + char *ptr; + size_t size = 16; + + pr_info("double-free (kzfree)\n"); + ptr = kmalloc(size, GFP_KERNEL); + if (!ptr) { + pr_err("Allocation failed\n"); + return; + } + + kzfree(ptr); + kzfree(ptr); +} + static int __init kmalloc_tests_init(void) { /* @@ -660,6 +676,7 @@ static int __init kmalloc_tests_init(void) kasan_memchr(); kasan_memcmp(); kasan_strings(); + kmalloc_double_kzfree(); kasan_restore_multi_shot(multishot); -- 2.22.0.410.gd8fdbe21b5-goog