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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 EE020C433E6 for ; Mon, 11 Jan 2021 14:07:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BEABF224B1 for ; Mon, 11 Jan 2021 14:07:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388490AbhAKOG6 (ORCPT ); Mon, 11 Jan 2021 09:06:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:50254 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730045AbhAKNDw (ORCPT ); Mon, 11 Jan 2021 08:03:52 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id B80BC229C4; Mon, 11 Jan 2021 13:03:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1610370217; bh=GfMXbRfUeFcMZqZh7Jp48Vz4XGxo8iPHxH2NCCBwKDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H8QoBTO0Z+qbPoW+kNdwSV9pFWUw8OhsPzlQN2xm8RLup1zoI3yv1rL8ATv/pIsjm CaMY67o4IJ3ST9hIdq+nH/dlnsRDH5LIQlghQ38wukW2xWvm+GdYxW/9zqpKAEyCft Ijo8jcGUd/PzLZL3cfi2RB32QqvNfPWfQtMOc3e4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+e87ebe0f7913f71f2ea5@syzkaller.appspotmail.com, Johan Hovold Subject: [PATCH 4.9 29/45] USB: yurex: fix control-URB timeout handling Date: Mon, 11 Jan 2021 14:01:07 +0100 Message-Id: <20210111130035.052449158@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210111130033.676306636@linuxfoundation.org> References: <20210111130033.676306636@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: Johan Hovold commit 372c93131998c0622304bed118322d2a04489e63 upstream. Make sure to always cancel the control URB in write() so that it can be reused after a timeout or spurious CMD_ACK. Currently any further write requests after a timeout would fail after triggering a WARN() in usb_submit_urb() when attempting to submit the already active URB. Reported-by: syzbot+e87ebe0f7913f71f2ea5@syzkaller.appspotmail.com Fixes: 6bc235a2e24a ("USB: add driver for Meywa-Denki & Kayac YUREX") Cc: stable # 2.6.37 Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/yurex.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/usb/misc/yurex.c +++ b/drivers/usb/misc/yurex.c @@ -507,6 +507,9 @@ static ssize_t yurex_write(struct file * timeout = schedule_timeout(YUREX_WRITE_TIMEOUT); finish_wait(&dev->waitq, &wait); + /* make sure URB is idle after timeout or (spurious) CMD_ACK */ + usb_kill_urb(dev->cntl_urb); + mutex_unlock(&dev->io_mutex); if (retval < 0) {