From patchwork Thu Apr 23 16:00:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 284003 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CABEDC54FD0 for ; Thu, 23 Apr 2020 16:09:30 +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 964DB20728 for ; Thu, 23 Apr 2020 16:09:30 +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="GiiVdRqw" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 964DB20728 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:58198 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jRePp-0003Dv-N4 for qemu-devel@archiver.kernel.org; Thu, 23 Apr 2020 12:09:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59946) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jReHp-000689-G2 for qemu-devel@nongnu.org; Thu, 23 Apr 2020 12:01:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jReHa-0002DS-GC for qemu-devel@nongnu.org; Thu, 23 Apr 2020 12:01:13 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:51532 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jReHa-00026V-1t for qemu-devel@nongnu.org; Thu, 23 Apr 2020 12:00:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1587657651; 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=2K7axtxXgjXDGGMpxgeovyJuxWoALcdT61SDt3E7mDA=; b=GiiVdRqwr+RB/dY+SW7e6NNr/n3eUjyzMFisU8jIs2M6kWuXSUFu3k4CvBgB+YWGCaBxpn jGm+Rix/KVVN/iepQhTwIq4FLESs9vJre8H3q8fcDGtgeurEmo86ht+r+bHWzOdhf6hK6i nh2/Ul0keDSFAPVfybAxbWa1MBDgrm0= 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-325-yjo7zZbmMR2IrdimW1V_tA-1; Thu, 23 Apr 2020 12:00:42 -0400 X-MC-Unique: yjo7zZbmMR2IrdimW1V_tA-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4509A180F123; Thu, 23 Apr 2020 16:00:41 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-113-6.ams2.redhat.com [10.36.113.6]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 804615D76A; Thu, 23 Apr 2020 16:00:39 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 70A8411358C5; Thu, 23 Apr 2020 18:00:36 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH 09/13] qapi: Assert non-input visitors see only valid narrow integers Date: Thu, 23 Apr 2020 18:00:32 +0200 Message-Id: <20200423160036.7048-10-armbru@redhat.com> In-Reply-To: <20200423160036.7048-1-armbru@redhat.com> References: <20200423160036.7048-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.120; envelope-from=armbru@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/23 06:43:51 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.120 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: mdroth@linux.vnet.ibm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" visit_type_intN() and visit_type_uintN() fail when the value is out of bounds. This is appropriate with an input visitor: the value comes from input, and input may be bad. It should never happen with the other visitors: the value comes from the caller, and callers must keep it within bounds. Assert that. Signed-off-by: Markus Armbruster --- qapi/qapi-visit-core.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c index 80ca83bcb9..74aa9c04bd 100644 --- a/qapi/qapi-visit-core.c +++ b/qapi/qapi-visit-core.c @@ -160,10 +160,13 @@ static void visit_type_uintN(Visitor *v, uint64_t *obj, const char *name, Error *err = NULL; uint64_t value = *obj; + assert(v->type == VISITOR_INPUT || value <= max); + v->type_uint64(v, name, &value, &err); if (err) { error_propagate(errp, err); } else if (value > max) { + assert(v->type == VISITOR_INPUT); error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null", type); } else { @@ -219,10 +222,13 @@ static void visit_type_intN(Visitor *v, int64_t *obj, const char *name, Error *err = NULL; int64_t value = *obj; + assert(v->type == VISITOR_INPUT || (value >= min && value <= max)); + v->type_int64(v, name, &value, &err); if (err) { error_propagate(errp, err); } else if (value < min || value > max) { + assert(v->type == VISITOR_INPUT); error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null", type); } else {