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Tue, 1 Sep 2020 14:21:01 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id E85EFF80217; Tue, 1 Sep 2020 14:20:59 +0200 (CEST) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id C560AF800BA for ; Tue, 1 Sep 2020 14:20:52 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz C560AF800BA 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 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 Cc: Rob Herring , Linux-ALSA , Takashi Iwai , syzkaller-bugs@googlegroups.com, linux-kernel , Mark Brown , syzbot X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" 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