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 381683DBD6F; Tue, 26 May 2026 12:02:55 +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=1779796979; cv=none; b=CfVgrSPxkThPrd8aQDfUAIuXJW3WB2hThVNHRlms5tRGWaXCDi3nSJNA9xewkTqZGGHsifu1ZaaFUAHppMVSlW0/WpxylWBF6cNmEd6X3Y8obJX5OzguIdvEYSsc5zA+RA99EwwqIqNNAjh79sWb3RigoPlrL8+cbI0Gpp4fIA0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779796979; c=relaxed/simple; bh=xN50JvEao8DgcnB8dH664WOc2F8j3VqWipG8r+3G9U4=; h=Mime-Version:Content-Type:Date:Message-Id:To:From:Subject:Cc: References:In-Reply-To; b=q/AfSu94W2dtQyLrQd0OB2EHkaXxdzh4+9C+fPjZZUp3vhu2QiNOG7eWDxoAZ+HbmuGD4Unxq7rXutGvkekdNyRBoNnAfCm4izCe2zawT5FZXMT/qjL9Fu56x5rlZJTaLQ/x57Fov8PUrk6U/HlavYLksMK/8SPkMguWLz21ygQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=k42lSbdX; 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="k42lSbdX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 885FE1F000E9; Tue, 26 May 2026 12:02:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779796975; bh=zgns/AcbFBPNd7vjCBbWzbcPqd4UDfeGNspKvZd2KWQ=; h=Date:To:From:Subject:Cc:References:In-Reply-To; b=k42lSbdXLRS6VluCQ+PUjHSJFB0Iis+QOvHSUhv+IXDbV9yiMafKGIkP+CQIrJ/6S +SOyLUbA1L2F8SRfYJpVS76MlFe9lAuji6AE20IWi6zTRkRCNlSGPej00fxLWzmLx7 gaXJ3tjpM1D1+xiFLOa9+xaC3GRyhIAP0ptgXz+V6IeXYjf5YEO+V8kwpwY5ZVMSCn eojYxsRFhmY1+2SqVb8pYwfInYuAho13BIWfVoVVfFblXXAsCHIihv9Na9a1GN4YbZ EwgNMmmJjYu6gj0zr1zTrWHQ/qBfCbQdKXWaOIh8nxmjo6hF/8wubznHKT5sAMiwcM yE5VWd5iB5O/A== 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 14:02:51 +0200 Message-Id: To: "Tetsuo Handa" From: "Danilo Krummrich" Subject: Re: [syzbot] [kernel?] linux-next test error: WARNING in class_for_each_device Cc: "Zhang Yuwei" , , "syzbot" , , , , , , 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 9:19 AM CEST, 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 20260525 >>> git tree: linux-next >>> console output: https://syzkaller.appspot.com/x/log.txt?x=3D15eb7796580= 000 >>> kernel config: https://syzkaller.appspot.com/x/.config?x=3D8dd72cf810e= 753a6 >>> dashboard link: https://syzkaller.appspot.com/bug?extid=3D50b5f81fff158= 669504a >>> compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e= 25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>> >>> Downloadable assets: >>> disk image: https://storage.googleapis.com/syzbot-assets/39490dfbc250/d= isk-d387b06f.raw.xz >>> vmlinux: https://storage.googleapis.com/syzbot-assets/0789ac7ac5fc/vmli= nux-d387b06f.xz >>> kernel image: https://storage.googleapis.com/syzbot-assets/4464df9f5ccf= /bzImage-d387b06f.xz >>> >>> IMPORTANT: if you fix the issue, please add the following tag to the co= mmit: >>> Reported-by: syzbot+50b5f81fff158669504a@syzkaller.appspotmail.com >>> >>> ------------[ cut here ]------------ >>> class_for_each_device called for class 'devlink' before it was register= ed >> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/comm= it/drivers/base?id=3D1137838865bfc9a7cd5869c1dc5c22aa45ec12c8 >>=20 >> Why "driver_deferred_probe_timeout * HZ" =3D> "driver_deferred_probe_tim= eout" ? >>=20 > > Here is an analysis from Google AI mode regarding this problem: https://s= hare.google/aimode/UO1WnoKPDSbyjY5Qj > > Greg, can you immediately drop commit 1137838865bf ("driver core: Use mod= _delayed_work to prevent > lost deferred probe work") so that syzbot can resume testing linux-next t= ree as soon as possible? I already posted patches to fix this in [1]. I will pick them up today. [1] https://lore.kernel.org/driver-core/20260525012340.3860581-1-dakr@kerne= l.org/t/#u