From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 353E03E0C41; Tue, 26 May 2026 12:03:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779797036; cv=none; b=hjMtgINuTqdhVE87GA3Oools8WFXkuzySGp+wG5AKM1MwOinGCJazFRJxR+7p8gDgKWh+ipCiADMxX0BFVPMmu7r0/JYD9kG0yAoFAGq43yRHrrNo5P9SMJ6cqRYtfrYVSODrhlk8MsBWfhspI4PnAZ8V300FbcZ5zNNQ1U+QJc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779797036; c=relaxed/simple; bh=n6ffshSou1HvsBi/aR6iI8hxKyVAfizL701qsGontZU=; h=Mime-Version:Content-Type:Date:Message-Id:Cc:To:From:Subject: References:In-Reply-To; b=r7eK01uzr7nYN4AsDBlWcy3lkYJUQN1unn/x0SwNVh2DLqq8+Jmx4UGIzQOXUgZQWANelr5K/L9IxekA7lKkisQPUfwdv8KxjOucrn54f2Iz4FpdVqOO5BZV3EOWhRpArKvQlJn5186i9kdagisaiTD5deZV2j7VprdE97xXmQk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UFevu7mh; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="UFevu7mh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8F44B1F000E9; Tue, 26 May 2026 12:03:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779797031; bh=bmKFm5NXkG4SYqSAeJY2UPlpmSMQcCOYFPH/9CqtcWk=; h=Date:Cc:To:From:Subject:References:In-Reply-To; b=UFevu7mhyAfA+Hq8YvutgMw9m0CkEOxhCQqQBzlDmW4onduivyx287MvoKEM8yCbn NOO8pXlkhAoJB9x4NpjKru86thGWrGX+E3V6joawAh2I9y4sSp1IMM5otleGY0bqgJ cabeWM2p9eNawfJEKPjFduwMKpibUutPvh5F/1hwpZEDxgtlGdc7PGOUiuQdTcbCsJ vAttt5nBSej+iBVNK5BJ0k8P7qWRmjRNfQyZVXkH0f1Qf0c301JbeXbGqLYpIftmkH NITWWjHnFjqVvd8jmXYZTRGut+bTj2hIc9PEtksuonvSCeU47+OGdcKArZA+Csjaok AsmSPC0f/tZjQ== Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Tue, 26 May 2026 14:03:48 +0200 Message-Id: Cc: "Zhang Yuwei" , , "Mark Brown" , "syzbot" , , , , , , To: "Tetsuo Handa" From: "Danilo Krummrich" Subject: Re: [syzbot] [kernel?] linux-next test error: WARNING in class_for_each_device References: <6a1535d6.820a0220.e7972.0008.GAE@google.com> <8e1f611d-e048-446b-a325-aa81c64f837c@I-love.SAKURA.ne.jp> In-Reply-To: On Tue May 26, 2026 at 1:59 PM CEST, Tetsuo Handa wrote: > On 2026/05/26 16:19, Tetsuo Handa wrote: >> On 2026/05/26 15:08, Tetsuo Handa wrote: >>> On 2026/05/26 14:55, syzbot wrote: >>>> Hello, >>>> >>>> syzbot found the following issue on: >>>> >>>> HEAD commit: d387b06f7c15 Add linux-next specific files for 2026052= 5 >>>> git tree: linux-next >>>> console output: https://syzkaller.appspot.com/x/log.txt?x=3D15eb779658= 0000 >>>> kernel config: https://syzkaller.appspot.com/x/.config?x=3D8dd72cf810= e753a6 >>>> dashboard link: https://syzkaller.appspot.com/bug?extid=3D50b5f81fff15= 8669504a >>>> compiler: Debian clang version 21.1.8 (++20251221033036+2078da43= e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>> >>>> Downloadable assets: >>>> disk image: https://storage.googleapis.com/syzbot-assets/39490dfbc250/= disk-d387b06f.raw.xz >>>> vmlinux: https://storage.googleapis.com/syzbot-assets/0789ac7ac5fc/vml= inux-d387b06f.xz >>>> kernel image: https://storage.googleapis.com/syzbot-assets/4464df9f5cc= f/bzImage-d387b06f.xz >>>> >>>> IMPORTANT: if you fix the issue, please add the following tag to the c= ommit: >>>> Reported-by: syzbot+50b5f81fff158669504a@syzkaller.appspotmail.com >>>> >>>> ------------[ cut here ]------------ >>>> class_for_each_device called for class 'devlink' before it was registe= red >>> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/com= mit/drivers/base?id=3D1137838865bfc9a7cd5869c1dc5c22aa45ec12c8 >>> >>> Why "driver_deferred_probe_timeout * HZ" =3D> "driver_deferred_probe_ti= meout" ? >>> >>=20 >> Here is an analysis from Google AI mode regarding this problem: https://= share.google/aimode/UO1WnoKPDSbyjY5Qj >>=20 >> Greg, can you immediately drop commit 1137838865bf ("driver core: Use mo= d_delayed_work to prevent >> lost deferred probe work") so that syzbot can resume testing linux-next = tree as soon as possible? >>=20 > > Below diff was generated via conversation with AI Mode in Google Search, = and > I agree that this diff should fix the problem. I'm waiting for Greg's res= ponse > on how to proceed. Mark, can you carry below diff as a hotfix for linux-n= ext tree? As mentioned in the previous reply, I already posted patches for this in [1= ]; will pick them up today. [1] https://lore.kernel.org/driver-core/20260525012340.3860581-1-dakr@kerne= l.org/t/#u