From nobody Mon Feb 9 23:03:18 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; dkim=fail; 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=1572268961; cv=none; d=zoho.com; s=zohoarc; b=VSqiRk3csAZza0bkjKSN0nM5s85Qbm0bnCvLzLGL22bmyrF/Lzvmqy3k2jNcTc+6V3XXhWwPcVrJlTI/TqZWaXxKv0TjO6F1Gxw+JazQrkh4eSJ6BHDeJCI0MjuG2ThPzaWzKha+ZHCHO88ROHe3GaUnoTdyhp2l74CoPPnK+m8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1572268961; h=Content-Type: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=2ks7fqz6OarAeHOWFTI0dVvnz7s3pMBNrIuytG56UVo=; b=C6hKACvEx90Ix6WmCZidrRrW1ou03Jfr9ZRvtTCCmm606PmB0e0TFHuF4khrF52jlK1cjO8CfjmIOiyXodiivsYJqeSAkUfSsQUni17Pg/B0GB4Wkb89kkGWv5vSlX5csGb/NtDNNq8EDNKniCE30qao2ZFhpWxutCDdCws7ZsQ= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail; 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 1572268961160887.0963841494648; Mon, 28 Oct 2019 06:22:41 -0700 (PDT) Received: from localhost ([::1]:53702 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iP4yl-0007OK-L1 for importer@patchew.org; Mon, 28 Oct 2019 09:22:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51108) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iP3xS-0003fo-Vv for qemu-devel@nongnu.org; Mon, 28 Oct 2019 08:17:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iP3xQ-0002JG-Nr for qemu-devel@nongnu.org; Mon, 28 Oct 2019 08:17:14 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:33962 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iP3xQ-0002GT-CO for qemu-devel@nongnu.org; Mon, 28 Oct 2019 08:17:12 -0400 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-387-Oaz8i3rFPX2tjNANa0ZOjA-1; Mon, 28 Oct 2019 08:17:04 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 823B0800FF1; Mon, 28 Oct 2019 12:17:03 +0000 (UTC) Received: from localhost (ovpn-117-83.ams2.redhat.com [10.36.117.83]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 26D1926186; Mon, 28 Oct 2019 12:17:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1572265028; 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=2ks7fqz6OarAeHOWFTI0dVvnz7s3pMBNrIuytG56UVo=; b=ElGAE28iwHNJqTONTWXJsVr3s2nisG184tWZsoKioJSFlptNBHZwc2xdSUunbEHO5/r7K3 W5VXhQe/nooxJZhFr9RnWPxX+y0CxGXclJBeLHQEOfO2H+zwruMrjQufdlship1SDYHWK7 s90tvG4Kcv/vTLdAeB1jKf7/QyNpoG8= From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 58/69] qcow2: Fix v3 snapshot table entry compliancy Date: Mon, 28 Oct 2019 13:14:50 +0100 Message-Id: <20191028121501.15279-59-mreitz@redhat.com> In-Reply-To: <20191028121501.15279-1-mreitz@redhat.com> References: <20191028121501.15279-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-MC-Unique: Oaz8i3rFPX2tjNANa0ZOjA-1 X-Mimecast-Spam-Score: 0 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: 207.211.31.81 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 , Peter Maydell , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) 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 Message-id: 20191011152814.14791-15-mreitz@redhat.com Signed-off-by: Max Reitz --- 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