Received: by 2002:a05:6a10:1287:0:0:0:0 with SMTP id d7csp3756232pxv; Mon, 19 Jul 2021 08:03:35 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxknCk3GN9dHffLPEYjfYp/ZEJfTyyooLvTNTzlBlHFvy9hh5GXr8nw7zf2lEDD3s67qrrw X-Received: by 2002:a92:ad04:: with SMTP id w4mr17084975ilh.221.1626707015472; Mon, 19 Jul 2021 08:03:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1626707015; cv=none; d=google.com; s=arc-20160816; b=xOMXdqRBuetIz6oKu1J3q54f5nVZb1sV1b5yGmVhMudgal9WGl8jRZZz7ryXQPcaQP /CLD055AlI+zjs8WIuJu401is8KcPaZ5+OtLjfGgRhlzIcHREucLit0cg+p9A0dpEi1B kgx9JyciHn2chA/uLt87/Geagh+cWzYlXdtbC4yE7MkgoBNSQ8iFJ6GLlYUDd1szmoY/ XSy5dm5KC1Y6j+BMI1rVY3Ye4Hnyu3/sZ+BUNp99/ZCj13kR/U+E/PU77x3sIThuMPKS BoRiH8Gm8AxJv3zellmaJnO3w9WUrsUG50ORjpIKN+cV+pVbESI3tvSH3xchZCa3Z3tU pm8g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :user-agent:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=2lw9WAL3x5ldpLxXDvI7eYOH2bTxcS1VPfyXMiJtOiM=; b=n2Iisni5Et60aa84tQQIDUQ206WBms4SrVt/H+4Jd+9DjbLZdqRJMfmKurBN6+wQdw prDjAoSo0HsPsEB6iWk15PL4h7ZMd4Rxc3U+YTNHHMvR64Xo63zNGUyIEexp8xT/jVum Ec0WVLlgi59bonFWu5gPdb7fiusyHRg+meKzpcDSHNnLJawHvEUTRKQr21FLHwMVAJdL hv1MZvNBNTOr0vlQlCvIsPTuduKXN1FvK7S5jKqgWnYZlwCVtRqNWFs4VP64jptog7/e yr2z7M2BYQPXPCfgEAm92OattYaeI9GNFefJSwkyc8V+pQb4XqkqlobXSCFesoSbPpJq 41vg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=Wk8LzSbt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id z25si9576691iod.45.2021.07.19.08.03.06; Mon, 19 Jul 2021 08:03:35 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=Wk8LzSbt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243026AbhGSOVg (ORCPT + 99 others); Mon, 19 Jul 2021 10:21:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:57020 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242288AbhGSOUC (ORCPT ); Mon, 19 Jul 2021 10:20:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E512161181; Mon, 19 Jul 2021 15:00:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626706842; bh=/9oC+f+zWClwTnluw8rSmDlc2sgotpXJHEq7gm+n6aE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wk8LzSbtDCeEy2otTazjB4kyuIUKA1MstPciaULC+JB61UWnfmaAt4SqglSaKM1SC EBRjfwV4tz9GNi5DvMvikB4vbhhH9Tn5h8E4+KbpUgiyVBvdZ9SYgl6ypAMSwueMqS FwTY2y0/xdtlXwRszN/zcOLgPkcfgDuwzTcYrv8c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anatoly Trosinenko , Miklos Szeredi Subject: [PATCH 4.4 123/188] fuse: reject internal errno Date: Mon, 19 Jul 2021 16:51:47 +0200 Message-Id: <20210719144940.503461684@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144913.076563739@linuxfoundation.org> References: <20210719144913.076563739@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 @@ -1931,7 +1931,7 @@ 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 err_finish; spin_lock(&fpq->lock);