From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755915AbcB2Qbl (ORCPT ); Mon, 29 Feb 2016 11:31:41 -0500 Received: from mail-lb0-f175.google.com ([209.85.217.175]:34710 "EHLO mail-lb0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755800AbcB2Qbi (ORCPT ); Mon, 29 Feb 2016 11:31:38 -0500 Subject: Re: [PATCH v4 6/7] kasan: Test fix: Warn if the UAF could not be detected in kmalloc_uaf2 To: Alexander Potapenko , adech.fo@gmail.com, cl@linux.com, dvyukov@google.com, akpm@linux-foundation.org, rostedt@goodmis.org, iamjoonsoo.kim@lge.com, js1304@gmail.com, kcc@google.com References: <9d9de65bc0661ccb4a663a4b59c0bb096e642cde.1456504662.git.glider@google.com> Cc: kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org From: Andrey Ryabinin Message-ID: <56D47267.5070308@gmail.com> Date: Mon, 29 Feb 2016 19:31:35 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 MIME-Version: 1.0 In-Reply-To: <9d9de65bc0661ccb4a663a4b59c0bb096e642cde.1456504662.git.glider@google.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/26/2016 07:48 PM, Alexander Potapenko wrote: > Signed-off-by: Alexander Potapenko > --- > lib/test_kasan.c | 2 ++ > 1 file changed, 2 insertions(+) > Acked-by: Andrey Ryabinin > diff --git a/lib/test_kasan.c b/lib/test_kasan.c > index 90ad74f..82169fb 100644 > --- a/lib/test_kasan.c > +++ b/lib/test_kasan.c > @@ -294,6 +294,8 @@ static noinline void __init kmalloc_uaf2(void) > } > > ptr1[40] = 'x'; > + if (ptr1 == ptr2) > + pr_err("Could not detect use-after-free: ptr1 == ptr2\n"); > kfree(ptr2); > } > >