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=-9.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 35594C433E2 for ; Tue, 1 Sep 2020 12:27:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 18C8A206EB for ; Tue, 1 Sep 2020 12:27:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728135AbgIAM13 (ORCPT ); Tue, 1 Sep 2020 08:27:29 -0400 Received: from mx2.suse.de ([195.135.220.15]:37040 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727949AbgIAMUx (ORCPT ); Tue, 1 Sep 2020 08:20:53 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 07425AEF8; Tue, 1 Sep 2020 12:20:53 +0000 (UTC) Date: Tue, 01 Sep 2020 14:20:52 +0200 Message-ID: From: Takashi Iwai To: Fabio Estevam Cc: syzbot , Linux-ALSA , Mark Brown , linux-kernel , Jaroslav Kysela , Rob Herring , syzkaller-bugs@googlegroups.com, Takashi Iwai Subject: Re: WARNING in snd_pcm_plugin_build_mulaw In-Reply-To: References: <000000000000971bc005ae3db23d@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 Tue, 01 Sep 2020 14:16:24 +0200, Fabio Estevam wrote: > > On Tue, Sep 1, 2020 at 7:08 AM syzbot > wrote: > > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 15bc20c6 Merge tag 'tty-5.9-rc3' of git://git.kernel.org/p.. > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=1268efb1900000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=891ca5711a9f1650 > > dashboard link: https://syzkaller.appspot.com/bug?extid=23b22dc2e0b81cbfcc95 > > compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11a95f41900000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11a452f2900000 > > > > The issue was bisected to: > > > > commit f3ca3f5b0966cfc2737178cca8a7a65b09991898 > > Author: Fabio Estevam > > Date: Fri Mar 27 15:57:21 2020 +0000 > > > > dt-bindings: sound: cs42l51: Remove unneeded I2C unit name > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15395f41900000 > > final oops: https://syzkaller.appspot.com/x/report.txt?x=17395f41900000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=13395f41900000 > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+23b22dc2e0b81cbfcc95@syzkaller.appspotmail.com > > Fixes: f3ca3f5b0966 ("dt-bindings: sound: cs42l51: Remove unneeded I2C unit name") > > The conclusion that this commit caused the problem is strange, since > this commit is just a yaml documentation fix. The bisection result must be bogus. And the issue here is harmless, merely a superfluous WARN_ON(). I'll work on it later. thanks, Takashi