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=-7.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 6D22AC433DF for ; Fri, 7 Aug 2020 06:24:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4723722CAE for ; Fri, 7 Aug 2020 06:24:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781485; bh=NEWTFKbeXMs6X35eaBwhoU6LJS6a/ZSjHevVS+cNwE4=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=GrJ7wLi+i/RH+XbprLXjjfhg2kDdgIU5C693vLufTeAqHc6lFkGTr19hOcQ1/X/en OIpx62+v4M3kbXSpP16Lw0feWDkIk91dzYXQQf62GO/cTuOF7bro7l32GEtm4UpfHk ZD7ySpx7f8qy9hcvrEyUmeGM46BhEdz8j/q2VwCM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726205AbgHGGYp (ORCPT ); Fri, 7 Aug 2020 02:24:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:33572 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725379AbgHGGYo (ORCPT ); Fri, 7 Aug 2020 02:24:44 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5B80F221E5; Fri, 7 Aug 2020 06:24:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781484; bh=NEWTFKbeXMs6X35eaBwhoU6LJS6a/ZSjHevVS+cNwE4=; h=Date:From:To:Subject:In-Reply-To:From; b=oS7eQESWW7FpnQKS2eZVw+VJfSnfLa9BtJGCfg+ppHqHjgZ7evddbyVWzLsepMNt6 ngjCbzLazeCGO4fiOow0l6s4J5JQTc7XVtbFMNG8dsDwqwfqT4ble7eGqDr8CqPfAh 7mQN7lTyHQGS2q0ZVp4BT1erts+ZIIYWjsoSEhOk= Date: Thu, 06 Aug 2020 23:24:42 -0700 From: Andrew Morton To: akpm@linux-foundation.org, andreyknvl@google.com, aryabinin@virtuozzo.com, corbet@lwn.net, dvyukov@google.com, glider@google.com, jiangshanlai@gmail.com, joel@joelfernandes.org, josh@joshtriplett.org, linux-mm@kvack.org, mathieu.desnoyers@efficios.com, matthias.bgg@gmail.com, mm-commits@vger.kernel.org, paulmck@kernel.org, torvalds@linux-foundation.org, walter-zh.wu@mediatek.com Subject: [patch 132/163] kasan: add tests for call_rcu stack recording Message-ID: <20200807062442.wgksHZUL3%akpm@linux-foundation.org> In-Reply-To: <20200806231643.a2711a608dd0f18bff2caf2b@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Walter Wu Subject: kasan: add tests for call_rcu stack recording Test call_rcu() call stack recording and verify whether it correctly is printed in KASAN report. Link: http://lkml.kernel.org/r/20200601051045.1294-1-walter-zh.wu@mediatek.com Signed-off-by: Walter Wu Reviewed-by: Dmitry Vyukov Tested-by: Dmitry Vyukov Reviewed-by: Andrey Konovalov Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Matthias Brugger Cc: Joel Fernandes Cc: Jonathan Corbet Cc: Josh Triplett Cc: Lai Jiangshan Cc: Mathieu Desnoyers Cc: "Paul E . McKenney" Signed-off-by: Andrew Morton --- lib/test_kasan.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) --- a/lib/test_kasan.c~kasan-add-tests-for-call_rcu-stack-recording +++ a/lib/test_kasan.c @@ -801,6 +801,35 @@ static noinline void __init vmalloc_oob( static void __init vmalloc_oob(void) {} #endif +static struct kasan_rcu_info { + int i; + struct rcu_head rcu; +} *global_rcu_ptr; + +static noinline void __init kasan_rcu_reclaim(struct rcu_head *rp) +{ + struct kasan_rcu_info *fp = container_of(rp, + struct kasan_rcu_info, rcu); + + kfree(fp); + fp->i = 1; +} + +static noinline void __init kasan_rcu_uaf(void) +{ + struct kasan_rcu_info *ptr; + + pr_info("use-after-free in kasan_rcu_reclaim\n"); + ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL); + if (!ptr) { + pr_err("Allocation failed\n"); + return; + } + + global_rcu_ptr = rcu_dereference_protected(ptr, NULL); + call_rcu(&global_rcu_ptr->rcu, kasan_rcu_reclaim); +} + static int __init kmalloc_tests_init(void) { /* @@ -848,6 +877,7 @@ static int __init kmalloc_tests_init(voi kasan_bitops(); kmalloc_double_kzfree(); vmalloc_oob(); + kasan_rcu_uaf(); kasan_restore_multi_shot(multishot); _