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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 29107C4321D for ; Tue, 21 Aug 2018 06:26:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E0216208A6 for ; Tue, 21 Aug 2018 06:26:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E0216208A6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728327AbeHUJot (ORCPT ); Tue, 21 Aug 2018 05:44:49 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:55764 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727017AbeHUJos (ORCPT ); Tue, 21 Aug 2018 05:44:48 -0400 Received: from localhost (5355525A.cm-6-6b.dynamic.ziggo.nl [83.85.82.90]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id ABB58516; Tue, 21 Aug 2018 06:26:00 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, John Ogness , Sebastian Andrzej Siewior , Johan Hovold Subject: [PATCH 4.17 26/42] USB: serial: sierra: fix potential deadlock at close Date: Tue, 21 Aug 2018 08:20:58 +0200 Message-Id: <20180821055018.924667755@linuxfoundation.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180821055017.596264829@linuxfoundation.org> References: <20180821055017.596264829@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: John Ogness commit e60870012e5a35b1506d7b376fddfb30e9da0b27 upstream. The portdata spinlock can be taken in interrupt context (via sierra_outdat_callback()). Disable interrupts when taking the portdata spinlock when discarding deferred URBs during close to prevent a possible deadlock. Fixes: 014333f77c0b ("USB: sierra: fix urb and memory leak on disconnect") Cc: stable Signed-off-by: John Ogness Signed-off-by: Sebastian Andrzej Siewior [ johan: amend commit message and add fixes and stable tags ] Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/sierra.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -770,9 +770,9 @@ static void sierra_close(struct usb_seri kfree(urb->transfer_buffer); usb_free_urb(urb); usb_autopm_put_interface_async(serial->interface); - spin_lock(&portdata->lock); + spin_lock_irq(&portdata->lock); portdata->outstanding_urbs--; - spin_unlock(&portdata->lock); + spin_unlock_irq(&portdata->lock); } sierra_stop_rx_urbs(port);