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=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,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 6E011C28EBD for ; Sun, 9 Jun 2019 17:15:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 46B06205F4 for ; Sun, 9 Jun 2019 17:15:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560100548; bh=wM8+B39AJFJBYFNNMwIZM79LNZKa3Xj6rCHc923s3GE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MU4fmS6VB9Nby5aDoq9q1wPI9n3yy/Ud2uajDweKd+cC4Dk7QauKe9rHhttA+bHCW Bh/qdmyWHdZkMJ36ALwEBjwhfUyY+CD8fBWZgepnxZ2A7559pBiNBajsJh+qH7RUq9 hmXVrEfeE646zfiDNNHkNq1Zk0R6v3oXwSCCAlow= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732120AbfFIQyL (ORCPT ); Sun, 9 Jun 2019 12:54:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:55758 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732529AbfFIQyL (ORCPT ); Sun, 9 Jun 2019 12:54:11 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 004CD205ED; Sun, 9 Jun 2019 16:54:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560099250; bh=wM8+B39AJFJBYFNNMwIZM79LNZKa3Xj6rCHc923s3GE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rUUTt4GD5Vn8LGdsFl06GQgZUHqNajPoC6lh3PexGGFK6IvjUwfwwRdCs8bIkzkW3 KfPx4oKaMBh4DvIWUZgjc8kkt1zRTF/tK4LbNnCn+1IK+4TVx7/upKlI5Z1CVI13CT 5bbyGxfHDomCdjwk418e9+yU3d9mp72FntmZoXDw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Oliver Neukum , syzbot+35f04d136fc975a70da4@syzkaller.appspotmail.com Subject: [PATCH 4.9 29/83] USB: rio500: refuse more than one device at a time Date: Sun, 9 Jun 2019 18:41:59 +0200 Message-Id: <20190609164130.117291274@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190609164127.843327870@linuxfoundation.org> References: <20190609164127.843327870@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Oliver Neukum commit 3864d33943b4a76c6e64616280e98d2410b1190f upstream. This driver is using a global variable. It cannot handle more than one device at a time. The issue has been existing since the dawn of the driver. Signed-off-by: Oliver Neukum Reported-by: syzbot+35f04d136fc975a70da4@syzkaller.appspotmail.com Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/rio500.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) --- a/drivers/usb/misc/rio500.c +++ b/drivers/usb/misc/rio500.c @@ -464,15 +464,23 @@ static int probe_rio(struct usb_interfac { struct usb_device *dev = interface_to_usbdev(intf); struct rio_usb_data *rio = &rio_instance; - int retval; + int retval = 0; - dev_info(&intf->dev, "USB Rio found at address %d\n", dev->devnum); + mutex_lock(&rio500_mutex); + if (rio->present) { + dev_info(&intf->dev, "Second USB Rio at address %d refused\n", dev->devnum); + retval = -EBUSY; + goto bail_out; + } else { + dev_info(&intf->dev, "USB Rio found at address %d\n", dev->devnum); + } retval = usb_register_dev(intf, &usb_rio_class); if (retval) { dev_err(&dev->dev, "Not able to get a minor for this device.\n"); - return -ENOMEM; + retval = -ENOMEM; + goto bail_out; } rio->rio_dev = dev; @@ -481,7 +489,8 @@ static int probe_rio(struct usb_interfac dev_err(&dev->dev, "probe_rio: Not enough memory for the output buffer\n"); usb_deregister_dev(intf, &usb_rio_class); - return -ENOMEM; + retval = -ENOMEM; + goto bail_out; } dev_dbg(&intf->dev, "obuf address:%p\n", rio->obuf); @@ -490,7 +499,8 @@ static int probe_rio(struct usb_interfac "probe_rio: Not enough memory for the input buffer\n"); usb_deregister_dev(intf, &usb_rio_class); kfree(rio->obuf); - return -ENOMEM; + retval = -ENOMEM; + goto bail_out; } dev_dbg(&intf->dev, "ibuf address:%p\n", rio->ibuf); @@ -498,8 +508,10 @@ static int probe_rio(struct usb_interfac usb_set_intfdata (intf, rio); rio->present = 1; +bail_out: + mutex_unlock(&rio500_mutex); - return 0; + return retval; } static void disconnect_rio(struct usb_interface *intf)