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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 993DCC433DB for ; Mon, 29 Mar 2021 15:04:31 +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 04DE16157F for ; Mon, 29 Mar 2021 15:04:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 04DE16157F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:58336 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lQtRN-0001Nv-VZ for qemu-devel@archiver.kernel.org; Mon, 29 Mar 2021 11:04:30 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48482) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lQtOo-00085G-NQ for qemu-devel@nongnu.org; Mon, 29 Mar 2021 11:01:57 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:28325) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lQtOk-0002Ik-Nm for qemu-devel@nongnu.org; Mon, 29 Mar 2021 11:01:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1617030105; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RIkErorTjiL3f7yPFbJXBnmkRoubtURSfd+beKRAr0g=; b=SokzmcfORKm5Cky318WrDwdZ1htG/tR+TVOk2s9yMGpwpQam/u18tybibWMJbmramwNnKd WxVqiBGLP1OPiLMTCp74B+dBlhnAglCsZ9yibnk0ZDkK2w/nNpHDQ847gPi6Y0e/PMcc/P 3kQQkWLZfCChrU0e6B8+boelXCLOgwk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-540-kOjTGfK8OymLo1LEZNG8Rg-1; Mon, 29 Mar 2021 11:01:41 -0400 X-MC-Unique: kOjTGfK8OymLo1LEZNG8Rg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 02681107BEF5; Mon, 29 Mar 2021 15:01:40 +0000 (UTC) Received: from steredhat.redhat.com (ovpn-115-72.ams2.redhat.com [10.36.115.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 25D9B5D9D3; Mon, 29 Mar 2021 15:01:35 +0000 (UTC) From: Stefano Garzarella To: qemu-devel@nongnu.org Subject: [PATCH 1/2] block/rbd: fix memory leak in qemu_rbd_connect() Date: Mon, 29 Mar 2021 17:01:28 +0200 Message-Id: <20210329150129.121182-2-sgarzare@redhat.com> In-Reply-To: <20210329150129.121182-1-sgarzare@redhat.com> References: <20210329150129.121182-1-sgarzare@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=sgarzare@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=63.128.21.124; envelope-from=sgarzare@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action 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: Kevin Wolf , qemu-block@nongnu.org, Peter Lieven , Max Reitz , Florian Florensa , Jason Dillaman Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" In qemu_rbd_connect(), 'mon_host' is allocated by qemu_rbd_mon_host() using g_strjoinv(), but it's only freed in the error path, leaking memory in the success path as reported by valgrind: 80 bytes in 4 blocks are definitely lost in loss record 5,028 of 6,516 at 0x4839809: malloc (vg_replace_malloc.c:307) by 0x5315BB8: g_malloc (in /usr/lib64/libglib-2.0.so.0.6600.8) by 0x532B6FF: g_strjoinv (in /usr/lib64/libglib-2.0.so.0.6600.8) by 0x87D07E: qemu_rbd_mon_host (rbd.c:538) by 0x87D07E: qemu_rbd_connect (rbd.c:562) by 0x87E1CE: qemu_rbd_open (rbd.c:740) by 0x840EB1: bdrv_open_driver (block.c:1528) by 0x8453A9: bdrv_open_common (block.c:1802) by 0x8453A9: bdrv_open_inherit (block.c:3444) by 0x8464C2: bdrv_open (block.c:3537) by 0x8108CD: qmp_blockdev_add (blockdev.c:3569) by 0x8EA61B: qmp_marshal_blockdev_add (qapi-commands-block-core.c:1086) by 0x90B528: do_qmp_dispatch_bh (qmp-dispatch.c:131) by 0x907EA4: aio_bh_poll (async.c:164) Fix freeing 'mon_host' also when qemu_rbd_connect() ends correctly. Signed-off-by: Stefano Garzarella --- block/rbd.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/block/rbd.c b/block/rbd.c index 9071a00e3f..24cefcd0dc 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -563,13 +563,13 @@ static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx, if (local_err) { error_propagate(errp, local_err); r = -EINVAL; - goto failed_opts; + goto out; } r = rados_create(cluster, opts->user); if (r < 0) { error_setg_errno(errp, -r, "error initializing"); - goto failed_opts; + goto out; } /* try default location when conf=NULL, but ignore failure */ @@ -626,11 +626,12 @@ static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx, */ rados_ioctx_set_namespace(*io_ctx, opts->q_namespace); - return 0; + r = 0; + goto out; failed_shutdown: rados_shutdown(*cluster); -failed_opts: +out: g_free(mon_host); return r; } -- 2.30.2