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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 24374C43381 for ; Tue, 12 Mar 2019 17:43:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EC5CA2173C for ; Tue, 12 Mar 2019 17:43:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552412624; bh=LViOXtgSeHv7Ue4AyKYmeawMNpmGA496SEaNIBWLguQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Ky1WotGKT2p73ZhM15Qyz73dFINWcIh9jSioVeyPqpUSkMRq6r7YfQDTEftV+Q/OR DTSO+BRBLc294qSfuILxEcup+CmIINF7EjHNRNIX2ovbyyblyBKL5q/cBZk8NYp9je rqNQEHUQ12vHv3kgnIPv7Vfjy6lttGUt7mQJBUFg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728473AbfCLRnh (ORCPT ); Tue, 12 Mar 2019 13:43:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:56844 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728873AbfCLRPq (ORCPT ); Tue, 12 Mar 2019 13:15:46 -0400 Received: from localhost (unknown [104.133.8.98]) (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 EC4172183F; Tue, 12 Mar 2019 17:15:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552410946; bh=LViOXtgSeHv7Ue4AyKYmeawMNpmGA496SEaNIBWLguQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nmdtUvT6RZbO6sixDnMYySE/mMNO3LsAeNyvIT5xI2O+VmfkUa1zToOtMkvCpohhU P57k4Nw6I7EVkAfJTsA8a6Tqi5kgA1wxqP2mRoJpwvJ+XbUVNY49KAElA6cSm+S5Ci m6ZFccqINFrC7D0ARt8Hh/vT8qT7UUChSL6sBW3Q= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , YueHaibing , "David S. Miller" Subject: [PATCH 4.14 010/135] net-sysfs: Fix mem leak in netdev_register_kobject Date: Tue, 12 Mar 2019 10:07:37 -0700 Message-Id: <20190312170342.101341125@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190312170341.127810985@linuxfoundation.org> References: <20190312170341.127810985@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: YueHaibing [ Upstream commit 895a5e96dbd6386c8e78e5b78e067dcc67b7f0ab ] syzkaller report this: BUG: memory leak unreferenced object 0xffff88837a71a500 (size 256): comm "syz-executor.2", pid 9770, jiffies 4297825125 (age 17.843s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 20 c0 ef 86 ff ff ff ff ........ ....... backtrace: [<00000000db12624b>] netdev_register_kobject+0x124/0x2e0 net/core/net-sysfs.c:1751 [<00000000dc49a994>] register_netdevice+0xcc1/0x1270 net/core/dev.c:8516 [<00000000e5f3fea0>] tun_set_iff drivers/net/tun.c:2649 [inline] [<00000000e5f3fea0>] __tun_chr_ioctl+0x2218/0x3d20 drivers/net/tun.c:2883 [<000000001b8ac127>] vfs_ioctl fs/ioctl.c:46 [inline] [<000000001b8ac127>] do_vfs_ioctl+0x1a5/0x10e0 fs/ioctl.c:690 [<0000000079b269f8>] ksys_ioctl+0x89/0xa0 fs/ioctl.c:705 [<00000000de649beb>] __do_sys_ioctl fs/ioctl.c:712 [inline] [<00000000de649beb>] __se_sys_ioctl fs/ioctl.c:710 [inline] [<00000000de649beb>] __x64_sys_ioctl+0x74/0xb0 fs/ioctl.c:710 [<000000007ebded1e>] do_syscall_64+0xc8/0x580 arch/x86/entry/common.c:290 [<00000000db315d36>] entry_SYSCALL_64_after_hwframe+0x49/0xbe [<00000000115be9bb>] 0xffffffffffffffff It should call kset_unregister to free 'dev->queues_kset' in error path of register_queue_kobjects, otherwise will cause a mem leak. Reported-by: Hulk Robot Fixes: 1d24eb4815d1 ("xps: Transmit Packet Steering") Signed-off-by: YueHaibing Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/core/net-sysfs.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -1402,6 +1402,9 @@ static int register_queue_kobjects(struc error: netdev_queue_update_kobjects(dev, txq, 0); net_rx_queue_update_kobjects(dev, rxq, 0); +#ifdef CONFIG_SYSFS + kset_unregister(dev->queues_kset); +#endif return error; }