From patchwork Thu May 25 19:42:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Foster Snowhill X-Patchwork-Id: 13255618 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C661C77B7E for ; Thu, 25 May 2023 19:55:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235261AbjEYTzA (ORCPT ); Thu, 25 May 2023 15:55:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44164 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242278AbjEYTy5 (ORCPT ); Thu, 25 May 2023 15:54:57 -0400 Received: from st43p00im-ztfb10063301.me.com (st43p00im-ztfb10063301.me.com [17.58.63.179]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5F7961BD for ; Thu, 25 May 2023 12:54:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pen.gy; s=sig1; t=1685043805; bh=7qTQoFvIqowISFG0SsZjr8VVFkKEqUXMz8EjBTX/N9s=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=SJJ4ZJDQTYYGTcl/HoWkVi8tnsrisCEUmSq3u6Vz/z5aAqebXX3mxopFTeOW1wxvm 584lWPyZpiHTgWedvuVQyR41mVXu5wMkkIhLsuOYoiLWosodYNFZzJU+Y3R/QYeb9N FdVmiG8ycUhzDQQX1Epd0vXid6/vGnFtNp/ySPHG8VbTe/soRmo8AmxuGIyhkCe8uV nd09ylETMlNW0dum/YSUqAck4iWOAvKZX4BxhVDpG1MCpFHtMdcDm3rCLlJmc0Xy8a 1VoF037xMjRQgqdcyvtAG9oz+KlN8Lp9objirCDFYZllp/5fuloRGTnIrdI630tZST UOQc3ZkbzVG2w== Received: from Eagle.se1.pen.gy (st43p00im-dlb-asmtp-mailmevip.me.com [17.42.251.41]) by st43p00im-ztfb10063301.me.com (Postfix) with ESMTPSA id AF0CE700477; Thu, 25 May 2023 19:43:23 +0000 (UTC) From: Foster Snowhill To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Georgi Valkov , Simon Horman , linux-usb@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH net-next v2 1/2] usbnet: ipheth: fix risk of NULL pointer deallocation Date: Thu, 25 May 2023 21:42:54 +0200 Message-Id: <20230525194255.4516-1-forst@pen.gy> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: 3hI-HWMBjo6aieRqhnIrucz4KdKH5qNX X-Proofpoint-GUID: 3hI-HWMBjo6aieRqhnIrucz4KdKH5qNX X-Proofpoint-Virus-Version: =?utf-8?q?vendor=3Dfsecure_engine=3D1=2E1=2E170-?= =?utf-8?q?22c6f66c430a71ce266a39bfe25bc2903e8d5c8f=3A6=2E0=2E573=2C18=2E0?= =?utf-8?q?=2E957=2C17=2E0=2E605=2E474=2E0000000_definitions=3D2023-05-18=5F?= =?utf-8?q?15=3A2023-05-17=5F02=2C2023-05-18=5F15=2C2020-01-23=5F02_signatur?= =?utf-8?q?es=3D0?= X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 phishscore=0 bulkscore=0 mlxscore=0 spamscore=0 adultscore=0 clxscore=1030 malwarescore=0 mlxlogscore=590 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2305250166 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Georgi Valkov The cleanup precedure in ipheth_probe will attempt to free a NULL pointer in dev->ctrl_buf if the memory allocation for this buffer is not successful. Rearrange the goto labels to avoid this risk. Signed-off-by: Georgi Valkov --- drivers/net/usb/ipheth.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/usb/ipheth.c b/drivers/net/usb/ipheth.c index 6a769df0b..8875a3d0e 100644 --- a/drivers/net/usb/ipheth.c +++ b/drivers/net/usb/ipheth.c @@ -510,8 +510,8 @@ static int ipheth_probe(struct usb_interface *intf, ipheth_free_urbs(dev); err_alloc_urbs: err_get_macaddr: -err_alloc_ctrl_buf: kfree(dev->ctrl_buf); +err_alloc_ctrl_buf: err_endpoints: free_netdev(netdev); return retval;