From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753238AbbICJPz (ORCPT ); Thu, 3 Sep 2015 05:15:55 -0400 Received: from mail-la0-f49.google.com ([209.85.215.49]:34288 "EHLO mail-la0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752481AbbICJPx (ORCPT ); Thu, 3 Sep 2015 05:15:53 -0400 Subject: Re: [PATCH 4/4] kasan: Prevent deadlock in kasan reporting To: "Aneesh Kumar K.V" , akpm@linux-foundation.org References: <1441266863-5435-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <1441266863-5435-4-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org From: Andrey Ryabinin Message-ID: <55E80FCE.6010000@gmail.com> Date: Thu, 3 Sep 2015 12:15:58 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <1441266863-5435-4-git-send-email-aneesh.kumar@linux.vnet.ibm.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 09/03/2015 10:54 AM, Aneesh Kumar K.V wrote: > We we end up calling kasan_report in real mode, our shadow mapping s/We we/We > for even spinlock variable will show poisoned. This will result > in us calling kasan_report_error with lock_report spin lock held. > To prevent this disable kasan reporting when we are priting s/priting/printing > error w.r.t kasan. > > Signed-off-by: Aneesh Kumar K.V > --- > mm/kasan/report.c | 12 ++++++++++-- > 1 file changed, 10 insertions(+), 2 deletions(-) > Reviewed-by: Andrey Ryabinin