From patchwork Sun May 16 15:55:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Schoenebeck X-Patchwork-Id: 12260499 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 C34B9C433B4 for ; Sun, 16 May 2021 18:09:28 +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 DA43061166 for ; Sun, 16 May 2021 18:09:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DA43061166 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=crudebyte.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:33016 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1liLCg-0005fs-P6 for qemu-devel@archiver.kernel.org; Sun, 16 May 2021 14:09:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46652) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <0eec3beb82ef137e20cf6f5ac07b0049cd314463@lizzy.crudebyte.com>) id 1liLBV-0004ym-KY for qemu-devel@nongnu.org; Sun, 16 May 2021 14:08:13 -0400 Received: from lizzy.crudebyte.com ([91.194.90.13]:39219) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <0eec3beb82ef137e20cf6f5ac07b0049cd314463@lizzy.crudebyte.com>) id 1liLBS-0002Bd-JJ for qemu-devel@nongnu.org; Sun, 16 May 2021 14:08:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=crudebyte.com; s=lizzy; h=Message-Id:Cc:To:Subject:Date:From:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Content-ID: Content-Description; bh=G79lVmtym+xutLubi7aAXG7xmx7rth7ox5YVCmYh3Cg=; b=k//JY EW1ercYu3dxYDWMnyVW8KFBq86QtxEIC4W31lAUTQLAe4A54Ndz9iFXxqKS+3bjSE+hTtL8esS0pg ESTUzNkUxJjPsziwQRzKGn+ybviaks2VsNSNdnuU3tyB3llSAmtz4TkTcPdeB2/dKMLRlCZKW+YLd FmztyZfXmnNOqNd8iGuJhg/XVryGgNNviPfB/AbP1TiO6x8MmbPfWnG4ksHTlCtO6E1ZVHZmvaPM5 y1slYbWxkyRWM03d82AKjjrT0favt82Ry0udbQTxPpBwa7GUpX1jxUrYAM52IL4z9SRjzmWKdssHu DdEmZN/Z+Cb4pMdekPjjPcDgf/Wng==; From: Christian Schoenebeck Date: Sun, 16 May 2021 17:55:34 +0200 Subject: [PATCH] 9pfs: simplify v9fs_walk() To: qemu-devel@nongnu.org Cc: Greg Kurz Message-Id: Received-SPF: none client-ip=91.194.90.13; envelope-from=0eec3beb82ef137e20cf6f5ac07b0049cd314463@lizzy.crudebyte.com; helo=lizzy.crudebyte.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" There is only one comparison between nwnames and P9_MAXWELEM required. Signed-off-by: Christian Schoenebeck Reviewed-by: Greg Kurz --- hw/9pfs/9p.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c index 0fa776af09..89aa07db78 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -1739,7 +1739,11 @@ static void coroutine_fn v9fs_walk(void *opaque) trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); - if (nwnames && nwnames <= P9_MAXWELEM) { + if (nwnames > P9_MAXWELEM) { + err = -EINVAL; + goto out_nofid; + } + if (nwnames) { wnames = g_new0(V9fsString, nwnames); qids = g_new0(V9fsQID, nwnames); for (i = 0; i < nwnames; i++) { @@ -1753,9 +1757,6 @@ static void coroutine_fn v9fs_walk(void *opaque) } offset += err; } - } else if (nwnames > P9_MAXWELEM) { - err = -EINVAL; - goto out_nofid; } fidp = get_fid(pdu, fid); if (fidp == NULL) {