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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 71714CA9EAF for ; Sun, 27 Oct 2019 21:03:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 376B3208C0 for ; Sun, 27 Oct 2019 21:03:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572210188; bh=3HIHj0GIBcAutRMnLSPPpw5aosuZHolhLDv0a8ZBVuo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=URFQSgh+zXTHarW053vMpcsirPPl8B14p8TSQS9fc/yB973RqSCBWfeAwLqIQC0Rq V1bGNBfPY+ph0pFi8R2IqweakWDZXXQKLJP4wjnM+HG9i344gDb3yJU/80X66LIryK RWnpaz60+6cjOVQffIysSgyGNoxsH8T7U0UD7QWk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728230AbfJ0VDH (ORCPT ); Sun, 27 Oct 2019 17:03:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:48236 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728216AbfJ0VDD (ORCPT ); Sun, 27 Oct 2019 17:03:03 -0400 Received: from localhost (100.50.158.77.rev.sfr.net [77.158.50.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5569720873; Sun, 27 Oct 2019 21:03:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572210181; bh=3HIHj0GIBcAutRMnLSPPpw5aosuZHolhLDv0a8ZBVuo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ip/r+I2mY23UAeQ5gf/yN3m7fg9cNZtM+hVZHMKrz14NQ0Exy8JTlFtRHw0msUe1Y sLKzA1fcoXc2bbPQ+T7o3kIuc5IPFs/dKnFuKXbeg7I45Qn1LMNXCrXKuwyRQrwFGc wB8cYLLnnV/Yom/FknwoJ4+HIBbamMZmDwKVPMkM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold Subject: [PATCH 4.4 19/41] USB: legousbtower: fix memleak on disconnect Date: Sun, 27 Oct 2019 22:00:57 +0100 Message-Id: <20191027203116.029871693@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191027203056.220821342@linuxfoundation.org> References: <20191027203056.220821342@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Johan Hovold commit b6c03e5f7b463efcafd1ce141bd5a8fc4e583ae2 upstream. If disconnect() races with release() after a process has been interrupted, release() could end up returning early and the driver would fail to free its driver data. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20191010125835.27031-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/legousbtower.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) --- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -425,10 +425,7 @@ static int tower_release (struct inode * goto exit; } - if (mutex_lock_interruptible(&dev->lock)) { - retval = -ERESTARTSYS; - goto exit; - } + mutex_lock(&dev->lock); if (dev->open_count != 1) { dev_dbg(&dev->udev->dev, "%s: device not opened exactly once\n",