From patchwork Mon Jul 12 06:07:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 474590 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 AC123C07E9B for ; Mon, 12 Jul 2021 06:17:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9100F610CA for ; Mon, 12 Jul 2021 06:17:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233984AbhGLGUJ (ORCPT ); Mon, 12 Jul 2021 02:20:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:38674 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233876AbhGLGTl (ORCPT ); Mon, 12 Jul 2021 02:19:41 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1886F610E6; Mon, 12 Jul 2021 06:16:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626070613; bh=d22YrF9/TqPga+NbVOkCH5mBQPKCk6LCwgrF4KMo5V0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QdvkXShjPx/L0d27wEkmYttFuj7YqjDZLevSHS55IiQ9MmTbfwANcdeCxxyGMyCFu +7aFeEysGYcIQ/UNDlD/f9Ztj2FXlh2KQ/04jMSXBJtEfzfBKjVocvpgekNShd0jTA 4uW4TqTR7gWfWvXfqlG5SuFfo58f6yV2IUNa+eJo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anatoly Trosinenko , Miklos Szeredi Subject: [PATCH 5.4 063/348] fuse: reject internal errno Date: Mon, 12 Jul 2021 08:07:27 +0200 Message-Id: <20210712060710.441739464@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060659.886176320@linuxfoundation.org> References: <20210712060659.886176320@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Miklos Szeredi commit 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 upstream. Don't allow userspace to report errors that could be kernel-internal. Reported-by: Anatoly Trosinenko Fixes: 334f485df85a ("[PATCH] FUSE - device functions") Cc: # v2.6.14 Signed-off-by: Miklos Szeredi Signed-off-by: Greg Kroah-Hartman --- fs/fuse/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1869,7 +1869,7 @@ static ssize_t fuse_dev_do_write(struct } err = -EINVAL; - if (oh.error <= -1000 || oh.error > 0) + if (oh.error <= -512 || oh.error > 0) goto copy_finish; spin_lock(&fpq->lock);