From patchwork Wed Jul 20 13:56:28 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frediano Ziglio X-Patchwork-Id: 105759 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 46CA3B6F70 for ; Thu, 21 Jul 2011 02:39:41 +1000 (EST) Received: from localhost ([::1]:52714 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QjZo9-0007Na-4U for incoming@patchwork.ozlabs.org; Wed, 20 Jul 2011 12:39:37 -0400 Received: from eggs.gnu.org ([140.186.70.92]:55287) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QjXXg-0002P3-5k for qemu-devel@nongnu.org; Wed, 20 Jul 2011 10:14:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QjXXd-00006S-Hp for qemu-devel@nongnu.org; Wed, 20 Jul 2011 10:14:27 -0400 Received: from mail-iw0-f173.google.com ([209.85.214.173]:40181) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QjXIy-0004RL-Gf for qemu-devel@nongnu.org; Wed, 20 Jul 2011 09:59:16 -0400 Received: by iwn3 with SMTP id 3so231137iwn.4 for ; Wed, 20 Jul 2011 06:59:15 -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=p5jl39SDtGSalsA5jc+VjOMdbdxl36NVpNHRiPRkhHsNIphDx3wqtS24Y0G2mJaLSL wX2ME/3Blbl1B8MJWB4hbKyNTABwYP2hyj/2x7wNKDuLsErOxith7oPMoAsX6n/ltEQ9 cEPF2DbByhQZSK5fkmMtN23aS46FzJLBTyd3Y= Received: by 10.231.112.93 with SMTP id v29mr1105288ibp.133.1311170355634; Wed, 20 Jul 2011 06:59:15 -0700 (PDT) Received: from localhost.localdomain (tor-exit-router41-readme.formlessnetworking.net [199.48.147.41]) by mx.google.com with ESMTPS id s2sm359274icw.17.2011.07.20.06.59.06 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 20 Jul 2011 06:59:15 -0700 (PDT) From: Frediano Ziglio To: qemu-devel@nongnu.org Date: Wed, 20 Jul 2011 15:56:28 +0200 Message-Id: <1311170189-29734-5-git-send-email-freddy77@gmail.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1311170189-29734-1-git-send-email-freddy77@gmail.com> References: <1311170189-29734-1-git-send-email-freddy77@gmail.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 209.85.214.173 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;