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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 18907C432C3 for ; Fri, 29 Nov 2019 07:29:49 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DEC7021721 for ; Fri, 29 Nov 2019 07:29:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DEC7021721 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:55514 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iaaip-0004UR-3m for qemu-devel@archiver.kernel.org; Fri, 29 Nov 2019 02:29:47 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:41614) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iaafN-0002fk-J0 for qemu-devel@nongnu.org; Fri, 29 Nov 2019 02:26:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iaafI-0003FU-Bv for qemu-devel@nongnu.org; Fri, 29 Nov 2019 02:26:11 -0500 Received: from szxga07-in.huawei.com ([45.249.212.35]:53406 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iaafB-0002Sh-PV; Fri, 29 Nov 2019 02:26:02 -0500 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id CF14DE5F7989B9981DAF; Fri, 29 Nov 2019 15:25:51 +0800 (CST) Received: from HGHY2P002143101.china.huawei.com (10.184.39.213) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.439.0; Fri, 29 Nov 2019 15:25:41 +0800 From: To: , , , Subject: [PATCH V3 2/2] block/nbd: fix memory leak in nbd_open() Date: Fri, 29 Nov 2019 15:25:26 +0800 Message-ID: <1575012326-51324-2-git-send-email-pannengyuan@huawei.com> X-Mailer: git-send-email 2.7.2.windows.1 In-Reply-To: <1575012326-51324-1-git-send-email-pannengyuan@huawei.com> References: <1575012326-51324-1-git-send-email-pannengyuan@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.184.39.213] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 45.249.212.35 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: liyiting@huawei.com, zhang.zhanghailiang@huawei.com, qemu-block@nongnu.org, PanNengyuan , qemu-devel@nongnu.org, kuhn.chenqun@huawei.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: PanNengyuan In currently implementation there will be a memory leak when nbd_client_connect() returns error status. Here is an easy way to reproduce: 1. run qemu-iotests as follow and check the result with asan: ./check -raw 143 Following is the asan output backtrack: Direct leak of 40 byte(s) in 1 object(s) allocated from: #0 0x7f629688a560 in calloc (/usr/lib64/libasan.so.3+0xc7560) #1 0x7f6295e7e015 in g_malloc0 (/usr/lib64/libglib-2.0.so.0+0x50015) #2 0x56281dab4642 in qobject_input_start_struct /mnt/sdb/qemu-4.2.0-rc0/qapi/qobject-input-visitor.c:295 #3 0x56281dab1a04 in visit_start_struct /mnt/sdb/qemu-4.2.0-rc0/qapi/qapi-visit-core.c:49 #4 0x56281dad1827 in visit_type_SocketAddress qapi/qapi-visit-sockets.c:386 #5 0x56281da8062f in nbd_config /mnt/sdb/qemu-4.2.0-rc0/block/nbd.c:1716 #6 0x56281da8062f in nbd_process_options /mnt/sdb/qemu-4.2.0-rc0/block/nbd.c:1829 #7 0x56281da8062f in nbd_open /mnt/sdb/qemu-4.2.0-rc0/block/nbd.c:1873 Direct leak of 15 byte(s) in 1 object(s) allocated from: #0 0x7f629688a3a0 in malloc (/usr/lib64/libasan.so.3+0xc73a0) #1 0x7f6295e7dfbd in g_malloc (/usr/lib64/libglib-2.0.so.0+0x4ffbd) #2 0x7f6295e96ace in g_strdup (/usr/lib64/libglib-2.0.so.0+0x68ace) #3 0x56281da804ac in nbd_process_options /mnt/sdb/qemu-4.2.0-rc0/block/nbd.c:1834 #4 0x56281da804ac in nbd_open /mnt/sdb/qemu-4.2.0-rc0/block/nbd.c:1873 Indirect leak of 24 byte(s) in 1 object(s) allocated from: #0 0x7f629688a3a0 in malloc (/usr/lib64/libasan.so.3+0xc73a0) #1 0x7f6295e7dfbd in g_malloc (/usr/lib64/libglib-2.0.so.0+0x4ffbd) #2 0x7f6295e96ace in g_strdup (/usr/lib64/libglib-2.0.so.0+0x68ace) #3 0x56281dab41a3 in qobject_input_type_str_keyval /mnt/sdb/qemu-4.2.0-rc0/qapi/qobject-input-visitor.c:536 #4 0x56281dab2ee9 in visit_type_str /mnt/sdb/qemu-4.2.0-rc0/qapi/qapi-visit-core.c:297 #5 0x56281dad0fa1 in visit_type_UnixSocketAddress_members qapi/qapi-visit-sockets.c:141 #6 0x56281dad17b6 in visit_type_SocketAddress_members qapi/qapi-visit-sockets.c:366 #7 0x56281dad186a in visit_type_SocketAddress qapi/qapi-visit-sockets.c:393 #8 0x56281da8062f in nbd_config /mnt/sdb/qemu-4.2.0-rc0/block/nbd.c:1716 #9 0x56281da8062f in nbd_process_options /mnt/sdb/qemu-4.2.0-rc0/block/nbd.c:1829 #10 0x56281da8062f in nbd_open /mnt/sdb/qemu-4.2.0-rc0/block/nbd.c:1873 Reported-by: Euler Robot Signed-off-by: PanNengyuan --- Changes v2 to v1: - add a new function to do the common cleanups (suggested by Stefano Garzarella). --- Changes v3 to v2: - split in two patches(suggested by Stefano Garzarella) --- block/nbd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/nbd.c b/block/nbd.c index 5805979..09d6925 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -1889,6 +1889,7 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags, ret = nbd_client_connect(bs, errp); if (ret < 0) { + nbd_free_bdrvstate_prop(s); return ret; } /* successfully connected */ -- 2.7.2.windows.1