Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14978C433F5 for ; Mon, 3 Jan 2022 14:22:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233422AbiACOWS (ORCPT ); Mon, 3 Jan 2022 09:22:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37428 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233423AbiACOWJ (ORCPT ); Mon, 3 Jan 2022 09:22:09 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A99A0C06179E; Mon, 3 Jan 2022 06:22:06 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 26E3FCE110D; Mon, 3 Jan 2022 14:22:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D480CC36AED; Mon, 3 Jan 2022 14:22:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1641219723; bh=yLmwlPHdrpgmr0YEKzev50jgMT2p9jeYzVcPI2wHECc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ih0wmr8yAfEE3ASvG2VtmNK592hMAUaffuuiGv5cEP3dVQfNyzCOPvtz2txmUKqC9 kH8dVoKgRDCmNDTesUKXZ9rDZPeRj9geuWdnYiSFLdZk0yb1ujjqT79dF4PAmqr/t3 nS+8f7LRPA4W/FvBFAb+9rDcHKMfh9GxgXhPklQA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pavel Skripkin , Dmitry Torokhov , syzbot+b88c5eae27386b252bbd@syzkaller.appspotmail.com Subject: [PATCH 4.4 09/11] Input: appletouch - initialize work before device registration Date: Mon, 3 Jan 2022 15:21:20 +0100 Message-Id: <20220103142051.072145187@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220103142050.763904028@linuxfoundation.org> References: <20220103142050.763904028@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pavel Skripkin commit 9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0 upstream. Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device Fixes: 5a6eb676d3bc ("Input: appletouch - improve powersaving for Geyser3 devices") Reported-and-tested-by: syzbot+b88c5eae27386b252bbd@syzkaller.appspotmail.com Signed-off-by: Pavel Skripkin Link: https://lore.kernel.org/r/20211230141151.17300-1-paskripkin@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/input/mouse/appletouch.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/input/mouse/appletouch.c +++ b/drivers/input/mouse/appletouch.c @@ -929,6 +929,8 @@ static int atp_probe(struct usb_interfac set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); set_bit(BTN_LEFT, input_dev->keybit); + INIT_WORK(&dev->work, atp_reinit); + error = input_register_device(dev->input); if (error) goto err_free_buffer; @@ -936,8 +938,6 @@ static int atp_probe(struct usb_interfac /* save our data pointer in this interface device */ usb_set_intfdata(iface, dev); - INIT_WORK(&dev->work, atp_reinit); - return 0; err_free_buffer: