From patchwork Wed Mar 18 20:23:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Snow X-Patchwork-Id: 11445937 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CA39F6CA for ; Wed, 18 Mar 2020 20:28:08 +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 A01F02077A for ; Wed, 18 Mar 2020 20:28:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="W3ifwqdH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A01F02077A 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:58186 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEfIN-0004iJ-KJ for patchwork-qemu-devel@patchwork.kernel.org; Wed, 18 Mar 2020 16:28:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57273) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEfFd-0007s2-E4 for qemu-devel@nongnu.org; Wed, 18 Mar 2020 16:25:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jEfFc-0003zr-88 for qemu-devel@nongnu.org; Wed, 18 Mar 2020 16:25:17 -0400 Received: from us-smtp-delivery-74.mimecast.com ([63.128.21.74]:49901) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jEfFc-0003xs-3u for qemu-devel@nongnu.org; Wed, 18 Mar 2020 16:25:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1584563115; 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=ahENl3BNbjiX9217T8D2HNUwmfnYsYvdtYYCuVYsDWw=; b=W3ifwqdHFaYXFlBxhuYdsMI+3QZe4ZeHa4vyTmhQuTbpH/+j8LqmhAF7MLuc6BeNiqPuEh iSbhTg4rZI+kd80RRhaEJtNPKlpgDAS0lRh1lQyuIVac1N6yoWaNJmM+rLCp978xG58IHp irEEDWUqOlCzxMK6E9zg3OuA5cZjUZE= 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-56-yTiTQA3kOvKA9ahtJvZO6w-1; Wed, 18 Mar 2020 16:25:13 -0400 X-MC-Unique: yTiTQA3kOvKA9ahtJvZO6w-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 24FB68EA6E6; Wed, 18 Mar 2020 20:24:48 +0000 (UTC) Received: from probe.redhat.com (ovpn-112-191.rdu2.redhat.com [10.10.112.191]) by smtp.corp.redhat.com (Postfix) with ESMTP id C94C7610B0; Wed, 18 Mar 2020 20:24:27 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org, jsnow@redhat.com, Peter Maydell Subject: [PULL v2 02/11] hbitmap: assert that we don't create bitmap larger than INT64_MAX Date: Wed, 18 Mar 2020 16:23:32 -0400 Message-Id: <20200318202341.6961-3-jsnow@redhat.com> In-Reply-To: <20200318202341.6961-1-jsnow@redhat.com> References: <20200318202341.6961-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 63.128.21.74 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 , Fam Zheng , Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org, Juan Quintela , libvir-list@redhat.com, Markus Armbruster , Max Reitz , Stefan Hajnoczi , "Dr. David Alan Gilbert" Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Vladimir Sementsov-Ogievskiy We have APIs which returns signed int64_t, to be able to return error. Therefore we can't handle bitmaps with absolute size larger than (INT64_MAX+1). Still, keep maximum to be INT64_MAX which is a bit safer. Note, that bitmaps are used to represent disk images, which can't exceed INT64_MAX anyway. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz Reviewed-by: Eric Blake Reviewed-by: John Snow Message-id: 20200205112041.6003-2-vsementsov@virtuozzo.com Signed-off-by: John Snow --- util/hbitmap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/util/hbitmap.c b/util/hbitmap.c index 242c6e519c..7f9b3e0cd7 100644 --- a/util/hbitmap.c +++ b/util/hbitmap.c @@ -716,6 +716,7 @@ HBitmap *hbitmap_alloc(uint64_t size, int granularity) HBitmap *hb = g_new0(struct HBitmap, 1); unsigned i; + assert(size <= INT64_MAX); hb->orig_size = size; assert(granularity >= 0 && granularity < 64); @@ -746,6 +747,7 @@ void hbitmap_truncate(HBitmap *hb, uint64_t size) uint64_t num_elements = size; uint64_t old; + assert(size <= INT64_MAX); hb->orig_size = size; /* Size comes in as logical elements, adjust for granularity. */