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=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 9065EC433DB for ; Tue, 16 Mar 2021 17:55:20 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 135DE650DE for ; Tue, 16 Mar 2021 17:55:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 135DE650DE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 91CDE6B006C; Tue, 16 Mar 2021 13:55:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8F47A6B0070; Tue, 16 Mar 2021 13:55:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7BB7C6B0071; Tue, 16 Mar 2021 13:55:19 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0070.hostedemail.com [216.40.44.70]) by kanga.kvack.org (Postfix) with ESMTP id 6095E6B006C for ; Tue, 16 Mar 2021 13:55:19 -0400 (EDT) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 151ED181AEF32 for ; Tue, 16 Mar 2021 17:55:19 +0000 (UTC) X-FDA: 77926489158.27.D635B50 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by imf07.hostedemail.com (Postfix) with ESMTP id B616FA001A81 for ; Tue, 16 Mar 2021 17:55:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615917307; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=et+8M4fnfpbY0GeGG05MXy/pGLb3+RZRFKGCfdaC3Sc=; b=dRepZzYg9PffAi9n/MCR37OApoL+T18R/mBWoaZJH/9XjjlvVMLb1eAKmINFOuwVXrSFIE AMYHy4wAJLvZzwqk1I1vuzYtlF2Usr5h9ubFvBm/5CAH2C4Q6JU1aRI//W4oP5Ypo+Nnhc BLvepVxQ2Uy5YbJms3CWkKvxJfHDDuQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-525-X_-hKvDyOCOief-DATOHdQ-1; Tue, 16 Mar 2021 13:55:03 -0400 X-MC-Unique: X_-hKvDyOCOief-DATOHdQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2E413760C7; Tue, 16 Mar 2021 17:55:01 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.40.192.135]) by smtp.corp.redhat.com (Postfix) with SMTP id 744255D9C0; Tue, 16 Mar 2021 17:54:57 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Tue, 16 Mar 2021 18:55:00 +0100 (CET) Date: Tue, 16 Mar 2021 18:54:56 +0100 From: Oleg Nesterov To: Walter Wu Cc: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Matthias Brugger , Andrey Konovalov , Andrew Morton , Jens Axboe , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, wsd_upstream , linux-mediatek@lists.infradead.org Subject: Re: [PATCH v2] task_work: kasan: record task_work_add() call stack Message-ID: <20210316175455.GA25881@redhat.com> References: <20210316024410.19967-1-walter-zh.wu@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210316024410.19967-1-walter-zh.wu@mediatek.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Stat-Signature: 3awmh3zz97kk3nz5pg55xm5tp91k5oc3 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: B616FA001A81 Received-SPF: none (redhat.com>: No applicable sender policy available) receiver=imf07; identity=mailfrom; envelope-from=""; helo=us-smtp-delivery-124.mimecast.com; client-ip=216.205.24.124 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1615917313-222194 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 03/16, Walter Wu wrote: > > --- a/kernel/task_work.c > +++ b/kernel/task_work.c > @@ -34,6 +34,9 @@ int task_work_add(struct task_struct *task, struct callback_head *work, > { > struct callback_head *head; > > + /* record the work call stack in order to print it in KASAN reports */ > + kasan_record_aux_stack(work); > + > do { > head = READ_ONCE(task->task_works); > if (unlikely(head == &work_exited)) Acked-by: Oleg Nesterov