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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 4F48EC43381 for ; Tue, 19 Mar 2019 13:35:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2B3642147C for ; Tue, 19 Mar 2019 13:35:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727366AbfCSNfL (ORCPT ); Tue, 19 Mar 2019 09:35:11 -0400 Received: from mx2.suse.de ([195.135.220.15]:44006 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726778AbfCSNfL (ORCPT ); Tue, 19 Mar 2019 09:35:11 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id DD132AF3A; Tue, 19 Mar 2019 13:35:08 +0000 (UTC) Date: Tue, 19 Mar 2019 14:35:05 +0100 Message-ID: From: Takashi Iwai To: syzbot Cc: alsa-devel-bounces@alsa-project.org, alsa-devel@alsa-project.org, dan.carpenter@oracle.com, gustavo@embeddedor.com, joe@perches.com, liam.r.girdwood@linux.intel.com, linux-kernel@vger.kernel.org, o-takashi@sakamocchi.jp, pasqualirb@gmail.com, perex@perex.cz, syzkaller-bugs@googlegroups.com, tiwai@suse.com, twischer@de.adit-jv.com, vkoul@kernel.org Subject: Re: KASAN: slab-out-of-bounds Write in default_read_copy_kernel In-Reply-To: <00000000000097b4a405843741e6@google.com> References: <0000000000004a6256057ca3b6bd@google.com> <00000000000097b4a405843741e6@google.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/25.3 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 16 Mar 2019 15:49:02 +0100, syzbot wrote: > > syzbot has bisected this bug to: > > commit 65766ee0bf7fe8b3be80e2e1c3ef54ad59b29476 > Author: Takashi Iwai > Date: Fri Nov 9 10:59:45 2018 +0000 > > ALSA: oss: Use kvzalloc() for local buffer allocations > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13ae57db200000 > start commit: 65766ee0 ALSA: oss: Use kvzalloc() for local buffer alloca.. > git tree: upstream > final crash: https://syzkaller.appspot.com/x/report.txt?x=106e57db200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=17ae57db200000 > kernel config: https://syzkaller.appspot.com/x/.config?x=b9cc5a440391cbfd > dashboard link: https://syzkaller.appspot.com/bug?extid=12f17c177de05efea72d > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16c27125400000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=152a2a43400000 > > Reported-by: syzbot+12f17c177de05efea72d@syzkaller.appspotmail.com > Fixes: 65766ee0 ("ALSA: oss: Use kvzalloc() for local buffer allocations") This commit itself is no cause, but it's merely a change allowing finer memory tracking. thanks, Takashi