From patchwork Mon Mar 7 19:25:44 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 8522391 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 1BEE09F8A8 for ; Mon, 7 Mar 2016 19:44:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7CE542010E for ; Mon, 7 Mar 2016 19:44:36 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 39588202C8 for ; Mon, 7 Mar 2016 19:44:35 +0000 (UTC) Received: from localhost ([::1]:58070 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ad150-00033D-IS for patchwork-qemu-devel@patchwork.kernel.org; Mon, 07 Mar 2016 14:44:34 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44795) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ad0n9-00048p-Ld for qemu-devel@nongnu.org; Mon, 07 Mar 2016 14:26:11 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ad0n7-0003zT-Ly for qemu-devel@nongnu.org; Mon, 07 Mar 2016 14:26:07 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60414) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ad0n7-0003yx-F5 for qemu-devel@nongnu.org; Mon, 07 Mar 2016 14:26:05 -0500 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id 1F0688F50B; Mon, 7 Mar 2016 19:26:05 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-116-61.ams2.redhat.com [10.36.116.61]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u27JQ1lo015451 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 7 Mar 2016 14:26:04 -0500 Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id AB604303F90D; Mon, 7 Mar 2016 20:25:57 +0100 (CET) From: Markus Armbruster To: qemu-devel@nongnu.org Date: Mon, 7 Mar 2016 20:25:44 +0100 Message-Id: <1457378754-21649-33-git-send-email-armbru@redhat.com> In-Reply-To: <1457378754-21649-1-git-send-email-armbru@redhat.com> References: <1457378754-21649-1-git-send-email-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: claudio.fontana@huawei.com, cam@cs.ualberta.ca, mlureau@redhat.com, david.marchand@6wind.com, pbonzini@redhat.com Subject: [Qemu-devel] [PATCH v2 32/42] ivshmem: Tighten check of property "size" 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP If size_t is narrower than 64 bits, passing uint64_t ivshmem_size to mmap() truncates. Reject such sizes. Signed-off-by: Markus Armbruster Reviewed-by: Marc-André Lureau --- hw/misc/ivshmem.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c index ef4249b..1c25621 100644 --- a/hw/misc/ivshmem.c +++ b/hw/misc/ivshmem.c @@ -87,7 +87,7 @@ typedef struct IVShmemState { */ MemoryRegion bar; MemoryRegion ivshmem; - uint64_t ivshmem_size; /* size of shared memory region */ + size_t ivshmem_size; /* size of shared memory region */ uint32_t ivshmem_64bit; Peer *peers; @@ -361,7 +361,7 @@ static int check_shm_size(IVShmemState *s, int fd, Error **errp) if (s->ivshmem_size > buf.st_size) { error_setg(errp, "Requested memory size greater" - " than shared object size (%" PRIu64 " > %" PRIu64")", + " than shared object size (%zu > %" PRIu64")", s->ivshmem_size, (uint64_t)buf.st_size); return -1; } else { @@ -861,7 +861,8 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp) } else { char *end; int64_t size = qemu_strtosz(s->sizearg, &end); - if (size < 0 || *end != '\0' || !is_power_of_2(size)) { + if (size < 0 || (size_t)size != size || *end != '\0' + || !is_power_of_2(size)) { error_setg(errp, "Invalid size %s", s->sizearg); return; }