From patchwork Tue Jun 8 18:27:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 457634 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=-18.9 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, 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 24E98C4743D for ; Tue, 8 Jun 2021 18:59:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0F9E86136D for ; Tue, 8 Jun 2021 18:59:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236418AbhFHTBe (ORCPT ); Tue, 8 Jun 2021 15:01:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:35576 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236562AbhFHS60 (ORCPT ); Tue, 8 Jun 2021 14:58:26 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 727EA61626; Tue, 8 Jun 2021 18:42:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623177765; bh=Yl7IPL85YzCd2CUddMcgindgnXZi0j50a/KS615JKeo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=C7js6YI+7IIJpXZ+ruUP0dof1v+9gwOpPkefGnKMaogPA6UyZ6lp1amtZWKCRkX3a 4zj5tFzZHJlcvarnIKnub3GuHxKtCVznCsTLmK1BawvlFyvss/AtksoRlYjWkep76E TAtRg0Mg9TK0q3lCjD6h2g5ibRMMBn/DjIV9UEtA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pavel Skripkin , "David S. Miller" Subject: [PATCH 5.10 092/137] net: caif: fix memory leak in cfusbl_device_notify Date: Tue, 8 Jun 2021 20:27:12 +0200 Message-Id: <20210608175945.490812280@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210608175942.377073879@linuxfoundation.org> References: <20210608175942.377073879@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Pavel Skripkin commit 7f5d86669fa4d485523ddb1d212e0a2d90bd62bb upstream. In case of caif_enroll_dev() fail, allocated link_support won't be assigned to the corresponding structure. So simply free allocated pointer in case of error. Fixes: 7ad65bf68d70 ("caif: Add support for CAIF over CDC NCM USB interface") Cc: stable@vger.kernel.org Signed-off-by: Pavel Skripkin Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/caif/caif_usb.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) --- a/net/caif/caif_usb.c +++ b/net/caif/caif_usb.c @@ -115,6 +115,11 @@ static struct cflayer *cfusbl_create(int return (struct cflayer *) this; } +static void cfusbl_release(struct cflayer *layer) +{ + kfree(layer); +} + static struct packet_type caif_usb_type __read_mostly = { .type = cpu_to_be16(ETH_P_802_EX1), }; @@ -127,6 +132,7 @@ static int cfusbl_device_notify(struct n struct cflayer *layer, *link_support; struct usbnet *usbnet; struct usb_device *usbdev; + int res; /* Check whether we have a NCM device, and find its VID/PID. */ if (!(dev->dev.parent && dev->dev.parent->driver && @@ -169,8 +175,11 @@ static int cfusbl_device_notify(struct n if (dev->num_tx_queues > 1) pr_warn("USB device uses more than one tx queue\n"); - caif_enroll_dev(dev, &common, link_support, CFUSB_MAX_HEADLEN, + res = caif_enroll_dev(dev, &common, link_support, CFUSB_MAX_HEADLEN, &layer, &caif_usb_type.func); + if (res) + goto err; + if (!pack_added) dev_add_pack(&caif_usb_type); pack_added = true; @@ -178,6 +187,9 @@ static int cfusbl_device_notify(struct n strlcpy(layer->name, dev->name, sizeof(layer->name)); return 0; +err: + cfusbl_release(link_support); + return res; } static struct notifier_block caif_device_notifier = {