From patchwork Wed Jul 20 07:57:03 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frediano Ziglio X-Patchwork-Id: 105599 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 075A8B6F70 for ; Wed, 20 Jul 2011 18:33:03 +1000 (EST) Received: from localhost ([::1]:34736 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QjSDC-0004ei-Hi for incoming@patchwork.ozlabs.org; Wed, 20 Jul 2011 04:32:58 -0400 Received: from eggs.gnu.org ([140.186.70.92]:40027) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QjReq-0005MY-9v for qemu-devel@nongnu.org; Wed, 20 Jul 2011 03:57:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QjReo-0004dP-Ka for qemu-devel@nongnu.org; Wed, 20 Jul 2011 03:57:28 -0400 Received: from mail-ew0-f45.google.com ([209.85.215.45]:42865) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QjReo-0004YT-2o for qemu-devel@nongnu.org; Wed, 20 Jul 2011 03:57:26 -0400 Received: by mail-ew0-f45.google.com with SMTP id 24so434493ewy.4 for ; Wed, 20 Jul 2011 00:57:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=VuWUXIF4/tfohHswGyhxkTrr4L/FHCJZNsEZLqN+8Zc=; b=WvshIIiZHfI/5HzfKyX9iwSgvynSVqKIWiHwdtpqrXXvgwF6f/Cv5aMpQcDFV6wh0u Z/oVrDtVvSFkXcboCVPbuDMi8/z6LkQQ2Yr5B/8eVRC4Nj9D5d+4JXnomir/jVBVi5pZ LNiXcGhtehQ6v5aD+OPrIbCaZx9M3eBP3DBA0= Received: by 10.213.10.142 with SMTP id p14mr142405ebp.128.1311148645475; Wed, 20 Jul 2011 00:57:25 -0700 (PDT) Received: from localhost.localdomain (tor-exit-router35-readme.formlessnetworking.net [199.48.147.35]) by mx.google.com with ESMTPS id x3sm357834eem.66.2011.07.20.00.57.21 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 20 Jul 2011 00:57:24 -0700 (PDT) From: Frediano Ziglio To: qemu-devel@nongnu.org Date: Wed, 20 Jul 2011 09:57:03 +0200 Message-Id: <1311148624-5640-5-git-send-email-freddy77@gmail.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1311148624-5640-1-git-send-email-freddy77@gmail.com> References: <1311148624-5640-1-git-send-email-freddy77@gmail.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 209.85.215.45 Cc: Kevin Wolf , Frediano Ziglio Subject: [Qemu-devel] [RFC PATCH 4/5] avoid dandling pointers X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Frediano Ziglio --- block/qcow.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/block/qcow.c b/block/qcow.c index 8ccd7d7..007fb57 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -616,6 +616,7 @@ static int qcow_co_readv(BlockDriverState *bs, int64_t sector_num, if (acb.qiov->niov > 1) { qemu_iovec_from_buffer(acb.qiov, acb.orig_buf, acb.qiov->size); qemu_vfree(acb.orig_buf); + acb.orig_buf = NULL; } return ret; @@ -700,6 +701,7 @@ static int qcow_co_writev(BlockDriverState *bs, int64_t sector_num, if (acb.qiov->niov > 1) { qemu_vfree(acb.orig_buf); + acb.orig_buf = NULL; } return ret;