From patchwork Mon Mar 15 13:51:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 401635 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 41973C41621 for ; Mon, 15 Mar 2021 13:54:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 207AB64EE3 for ; Mon, 15 Mar 2021 13:54:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231393AbhCONyV (ORCPT ); Mon, 15 Mar 2021 09:54:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:56918 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231145AbhCONxv (ORCPT ); Mon, 15 Mar 2021 09:53:51 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 725DB64F07; Mon, 15 Mar 2021 13:53:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816431; bh=FaW9x8HhE6as/IO5W+lcpoDoipNfhCCAyi0HIq0I0cY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nH0xGVCdK8EQwY/xrwv54s5PKJE6j80ETIiv5ayV/ANPvodLukretkdEc2ZDcLeqj NsFffjR1kNIHrrUMvYuffD9I4dUBMFLCI/9SQdrBy79DCjZRuKadTg4kwi11N7f7b8 rXvO9vXsKDObUwd8eXs3p30qiWfEDXxtRCWBex9k= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+59f777bdcbdd7eea5305@syzkaller.appspotmail.com, Pavel Skripkin , Johan Hovold Subject: [PATCH 4.9 35/78] USB: serial: io_edgeport: fix memory leak in edge_startup Date: Mon, 15 Mar 2021 14:51:58 +0100 Message-Id: <20210315135213.222503765@linuxfoundation.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315135212.060847074@linuxfoundation.org> References: <20210315135212.060847074@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Greg Kroah-Hartman From: Pavel Skripkin commit cfdc67acc785e01a8719eeb7012709d245564701 upstream. sysbot found memory leak in edge_startup(). The problem was that when an error was received from the usb_submit_urb(), nothing was cleaned up. Reported-by: syzbot+59f777bdcbdd7eea5305@syzkaller.appspotmail.com Signed-off-by: Pavel Skripkin Fixes: 6e8cf7751f9f ("USB: add EPIC support to the io_edgeport driver") Cc: stable@vger.kernel.org # 2.6.21: c5c0c55598ce Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/io_edgeport.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -2959,26 +2959,32 @@ static int edge_startup(struct usb_seria response = -ENODEV; } - usb_free_urb(edge_serial->interrupt_read_urb); - kfree(edge_serial->interrupt_in_buffer); - - usb_free_urb(edge_serial->read_urb); - kfree(edge_serial->bulk_in_buffer); - - kfree(edge_serial); - - return response; + goto error; } /* start interrupt read for this edgeport this interrupt will * continue as long as the edgeport is connected */ response = usb_submit_urb(edge_serial->interrupt_read_urb, GFP_KERNEL); - if (response) + if (response) { dev_err(ddev, "%s - Error %d submitting control urb\n", __func__, response); + + goto error; + } } return response; + +error: + usb_free_urb(edge_serial->interrupt_read_urb); + kfree(edge_serial->interrupt_in_buffer); + + usb_free_urb(edge_serial->read_urb); + kfree(edge_serial->bulk_in_buffer); + + kfree(edge_serial); + + return response; }