From nobody Mon Feb 9 13:38:39 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1570808427; cv=none; d=zoho.com; s=zohoarc; b=JdmyFc+ofnyvblNk8Z8lL94dsplQttSy+xvDJL2q510c6k+LSN7vByVv8sFiJoHBA+SNwh+BTIk6RjHhOlX4n715xOenAqNF9O8BsTtS61OCqK7eq9yaEsTox/oX8lDzRxjRqpDyEnrzIykv+C5QqhZywEhWER89TCF2xUzpINQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1570808427; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=z77RBQL2XYxMS3AdxqbzS9TYFtCR/x+W9dQqKaW4VIs=; b=Mu0KAy1VAnKxXeXCEYOefgj6qnF0Ii9dQSD8J4xDdgjM8rir995wXKos3OpzClx1wetQFjqm0JQQ+4IklaOfkmz/3WXVcD77PXD0VhiOdCyYy3kfWA3A6trZUGowEhywwxXyBSVa944+4CySoyPY7r2zdaRVUgQVxE77Bqf1be8= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1570808427869784.7849054312106; Fri, 11 Oct 2019 08:40:27 -0700 (PDT) Received: from localhost ([::1]:52328 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIx1j-0006Pw-Dn for importer@patchew.org; Fri, 11 Oct 2019 11:40:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57999) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIwqi-000235-Vd for qemu-devel@nongnu.org; Fri, 11 Oct 2019 11:29:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIwqh-0006jp-U5 for qemu-devel@nongnu.org; Fri, 11 Oct 2019 11:29:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56634) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIwqf-0006hI-KN; Fri, 11 Oct 2019 11:28:57 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D4CF3C059B80; Fri, 11 Oct 2019 15:28:56 +0000 (UTC) Received: from localhost (ovpn-116-40.ams2.redhat.com [10.36.116.40]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5CFFC5D6C8; Fri, 11 Oct 2019 15:28:56 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PATCH v3 14/16] qcow2: Fix v3 snapshot table entry compliancy Date: Fri, 11 Oct 2019 17:28:12 +0200 Message-Id: <20191011152814.14791-15-mreitz@redhat.com> In-Reply-To: <20191011152814.14791-1-mreitz@redhat.com> References: <20191011152814.14791-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 11 Oct 2019 15:28:56 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 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-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" qcow2 v3 images require every snapshot table entry to have at least 16 bytes of extra data. If they do not, let qemu-img check -r all fix it. Signed-off-by: Max Reitz Reviewed-by: Eric Blake --- block/qcow2-snapshot.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index dac8a778e4..5ab64da1ec 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -516,6 +516,24 @@ int coroutine_fn qcow2_check_read_snapshot_table(Block= DriverState *bs, result->corruptions -=3D nb_clusters_reduced; } =20 + /* + * All of v3 images' snapshot table entries need to have at least + * 16 bytes of extra data. + */ + if (s->qcow_version >=3D 3) { + int i; + for (i =3D 0; i < s->nb_snapshots; i++) { + if (s->snapshots[i].extra_data_size < + sizeof_field(QCowSnapshotExtraData, vm_state_size_large) + + sizeof_field(QCowSnapshotExtraData, disk_size)) + { + result->corruptions++; + fprintf(stderr, "%s snapshot table entry %i is incomplete\= n", + fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i); + } + } + } + return 0; } =20 --=20 2.21.0