From patchwork Thu Aug 20 09:20:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 265310 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 BCA0BC433E1 for ; Thu, 20 Aug 2020 13:28:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 90A4B20658 for ; Thu, 20 Aug 2020 13:28:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597930114; bh=ayR58E/HkqMTNKquLhSI45UEGPZWQDPCo6KAuDomwQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TVvQorVtxsSmh/lEfhDfL/oZOc25xx8PTUAbb0Bxtfjk6/SWQLw4ZQLPJOUHqLNGN 277vZJlwQ1PisnryGusTn4bnmma7R0QE4ru8STHynraQSdDpt09/snXI5XmOfFvvv6 +kE1gY3X8Hum0wBpMv8SM3LaLkKQuDy5WUGeY0LE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728488AbgHTNW7 (ORCPT ); Thu, 20 Aug 2020 09:22:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:45704 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728398AbgHTJdY (ORCPT ); Thu, 20 Aug 2020 05:33:24 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A898922B43; Thu, 20 Aug 2020 09:33:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597915987; bh=ayR58E/HkqMTNKquLhSI45UEGPZWQDPCo6KAuDomwQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L+1kDLtXpYJYGDKK+WLCmROCP1GCxfta20+l+Y8QzESEiLfaPisXoRy2rTq94DGll Ryg3ryZF33+PNx6QHzIaQPA7SiPygw7ezdJxpJgeugzz8ytdQJhY7OZNSqJY51G2Ct Zv+4GRJTewChjKmGAy3mUj48Df3u2lccnty+WpH4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tiezhu Yang , Andrew Morton , Guenter Roeck , Konstantin Khlebnikov , Kees Cook , Linus Torvalds , Sasha Levin Subject: [PATCH 5.8 205/232] lib/test_lockup.c: fix return value of test_lockup_init() Date: Thu, 20 Aug 2020 11:20:56 +0200 Message-Id: <20200820091622.740690835@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820091612.692383444@linuxfoundation.org> References: <20200820091612.692383444@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tiezhu Yang [ Upstream commit 3adf3bae0d612357da516d39e1584f1547eb6e86 ] Since filp_open() returns an error pointer, we should use IS_ERR() to check the return value and then return PTR_ERR() if failed to get the actual return value instead of always -EINVAL. E.g. without this patch: [root@localhost loongson]# ls no_such_file ls: cannot access no_such_file: No such file or directory [root@localhost loongson]# modprobe test_lockup file_path=no_such_file lock_sb_umount time_secs=60 state=S modprobe: ERROR: could not insert 'test_lockup': Invalid argument [root@localhost loongson]# dmesg | tail -1 [ 126.100596] test_lockup: cannot find file_path With this patch: [root@localhost loongson]# ls no_such_file ls: cannot access no_such_file: No such file or directory [root@localhost loongson]# modprobe test_lockup file_path=no_such_file lock_sb_umount time_secs=60 state=S modprobe: ERROR: could not insert 'test_lockup': Unknown symbol in module, or unknown parameter (see dmesg) [root@localhost loongson]# dmesg | tail -1 [ 95.134362] test_lockup: failed to open no_such_file: -2 Fixes: aecd42df6d39 ("lib/test_lockup.c: add parameters for locking generic vfs locks") Signed-off-by: Tiezhu Yang Signed-off-by: Andrew Morton Reviewed-by: Guenter Roeck Cc: Konstantin Khlebnikov Cc: Kees Cook Link: http://lkml.kernel.org/r/1595555407-29875-2-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- lib/test_lockup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/test_lockup.c b/lib/test_lockup.c index bd7c7ff39f6be..e7202763a1688 100644 --- a/lib/test_lockup.c +++ b/lib/test_lockup.c @@ -512,8 +512,8 @@ static int __init test_lockup_init(void) if (test_file_path[0]) { test_file = filp_open(test_file_path, O_RDONLY, 0); if (IS_ERR(test_file)) { - pr_err("cannot find file_path\n"); - return -EINVAL; + pr_err("failed to open %s: %ld\n", test_file_path, PTR_ERR(test_file)); + return PTR_ERR(test_file); } test_inode = file_inode(test_file); } else if (test_lock_inode ||