From mboxrd@z Thu Jan 1 00:00:00 1970 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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 121DFC6778A for ; Mon, 9 Jul 2018 04:54:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C806D208E0 for ; Mon, 9 Jul 2018 04:54:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C806D208E0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ZenIV.linux.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754544AbeGIEy0 (ORCPT ); Mon, 9 Jul 2018 00:54:26 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:38052 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754317AbeGIEyT (ORCPT ); Mon, 9 Jul 2018 00:54:19 -0400 Received: from viro by ZenIV.linux.org.uk with local (Exim 4.87 #1 (Red Hat Linux)) id 1fcOBl-0003eS-Qq; Mon, 09 Jul 2018 04:54:17 +0000 From: Al Viro To: Linus Torvalds Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC][PATCH 04/27] make sure do_dentry_open() won't return positive as an error Date: Mon, 9 Jul 2018 05:53:54 +0100 Message-Id: <20180709045417.13988-4-viro@ZenIV.linux.org.uk> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20180709045417.13988-1-viro@ZenIV.linux.org.uk> References: <20180709045320.GF30522@ZenIV.linux.org.uk> <20180709045417.13988-1-viro@ZenIV.linux.org.uk> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Al Viro An ->open() instances really, really should not be doing that. There's a lot of places e.g. around atomic_open() that could be confused by that, so let's catch that early. Signed-off-by: Al Viro --- fs/open.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/open.c b/fs/open.c index d0e955b558ad..40658ef912d2 100644 --- a/fs/open.c +++ b/fs/open.c @@ -812,6 +812,10 @@ static int do_dentry_open(struct file *f, return 0; cleanup_all: + if (unlikely(error > 0)) { + WARN_ON(1); + error = -EINVAL; + } fops_put(f->f_op); if (f->f_mode & FMODE_WRITER) { put_write_access(inode); -- 2.11.0