From patchwork Sun Jul 8 21:01:53 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 10513325 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D0EDF603D7 for ; Sun, 8 Jul 2018 21:06:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C3CDE289CE for ; Sun, 8 Jul 2018 21:06:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B83CA289E0; Sun, 8 Jul 2018 21:06:29 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 72C3D289CE for ; Sun, 8 Jul 2018 21:06:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933481AbeGHVFt (ORCPT ); Sun, 8 Jul 2018 17:05:49 -0400 Received: from mail-pf0-f196.google.com ([209.85.192.196]:37723 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932437AbeGHVFr (ORCPT ); Sun, 8 Jul 2018 17:05:47 -0400 Received: by mail-pf0-f196.google.com with SMTP id x10-v6so2291937pfm.4; Sun, 08 Jul 2018 14:05:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=tQgirrJxXJmTmU+afvcNHwBLtlIR/mauWurgdutbcLM=; b=iEN9obSjbeaiXGTbCgnC05ErOUwahBXXOvzWhxO0lsuv0A4xlgmR9wvcaQ9d90vt11 y3CQOSQaE2HnWT/nMM6RzyHr0m3UYfDQdb5QhNRzT51655NqqRO5QwJM+CXsDtIp++qa AJlaBeF/m2N6a6GVsX5/NI4HlT9WeJ5yqXINfKWlsCuhjImx5ANZim3SVuWTor9pSI4W yXwfKEmCL8Oh5jv+hviDebeQ7RKFUb0mcA6baSQyyaXPNfo8yPZXQM0uSTEH0Rrt4HA6 nYP0FHcsrLDoLuQkQjgN9/5oNUDTfE7TYedST9MVD4jB/i8AtE9gDZGhfTLQHPejQOJ5 +TsA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=tQgirrJxXJmTmU+afvcNHwBLtlIR/mauWurgdutbcLM=; b=mlR/it91E1PJEoikksZ1DVEWY7BxbM5+hVw8piwT2ZGPqeZpR1Ng3z3BcLzBxQEi9V 7LVCWJAD0vWIPNkDmKhmmDOF5UOV34jThSHkZOgvqtYawUW15wIXzCD0ovQa4py8BLW+ vWPCGuVxV0ouxolvPv1Xc5Q7SdERpcpkvc4Nl86oOT/7aTww7aJF9S44Th8cU4yGwW/G vnZu7D4Si5shTa4QMpCaToSTm4URJcXsN7egVc7LqN0bOmRLUy7FVDGUmirK2Hrz1Cou UJzwOWddFcjnEbRBupnBctabVMJ9Lpu9IfXUad4w8/mLuLaW1+h1UbVNgwUqZAn73G/Y Ajmg== X-Gm-Message-State: APt69E3ddPAmUX4iglqz3yfKpDUIU2Kh9Kc1Iw+pL7JwM68cl0e41Kh1 gzbhzuFhpAtV82oPBnbIEJk= X-Google-Smtp-Source: AAOMgpc2xBwXHm9MU51z6n7bv31WKUbecd53Ut2EjrbbebQlS6VYtFHENCLFThLSdBlhDIrJcBN+Iw== X-Received: by 2002:a62:d10b:: with SMTP id z11-v6mr18671440pfg.255.1531083946982; Sun, 08 Jul 2018 14:05:46 -0700 (PDT) Received: from sol.localdomain (c-67-185-97-198.hsd1.wa.comcast.net. [67.185.97.198]) by smtp.gmail.com with ESMTPSA id x68-v6sm23355681pfb.138.2018.07.08.14.05.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 08 Jul 2018 14:05:46 -0700 (PDT) From: Eric Biggers To: David Howells , Alexander Viro , linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Eric Biggers Subject: [PATCH 17/18] fs_context: de-obfuscate command validation Date: Sun, 8 Jul 2018 14:01:53 -0700 Message-Id: <20180708210154.10423-18-ebiggers3@gmail.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180708210154.10423-1-ebiggers3@gmail.com> References: <20180708210154.10423-1-ebiggers3@gmail.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Eric Biggers Signed-off-by: Eric Biggers --- fs/fsopen.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/fsopen.c b/fs/fsopen.c index dd38f6b65aace..34d7292bb398e 100644 --- a/fs/fsopen.c +++ b/fs/fsopen.c @@ -50,10 +50,10 @@ static ssize_t fscontext_write(struct file *file, case 'x': break; default: - goto err_bad_cmd; + return -EINVAL; } if (opt[1] != ' ') - goto err_bad_cmd; + return -EINVAL; data = memdup_user_nul(_buf + 2, len - 2); if (IS_ERR(data)) @@ -136,8 +136,7 @@ static ssize_t fscontext_write(struct file *file, err_free: kfree(data); return ret; -err_bad_cmd: - return -EINVAL; + wrong_phase: ret = -EBUSY; goto err_unlock;