Received: by 2002:a05:6a10:f3d0:0:0:0:0 with SMTP id a16csp2833992pxv; Mon, 12 Jul 2021 03:05:48 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxvsbuyltcF2AdECAPRQf1nSfUhEMU9rtK5DinbmZvsXzc7tfG5UOSuiEEINSJgYlaj/YNp X-Received: by 2002:a92:2911:: with SMTP id l17mr3015176ilg.263.1626084348516; Mon, 12 Jul 2021 03:05:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1626084348; cv=none; d=google.com; s=arc-20160816; b=MKZK7bPMrh1bzHu2qY9mMhiu3LlymjEgaPVK++yQcV0QB6kEA+0aYNfKtgVuvZwojN sv1hX7GnUkG6oZhW9jnqSJwS6NVawZ5t/d4IWiDdxDwwAC8J6+a+qiakaNsUE74Q5uYD DSCY2hsRBxCPl298vIdz1w6vgb0gixHNxqs/dEzen5MHy14Ao5EZSZMfG/DQGTgCxcTI mH3t1HD9sbIKrJMPEVg+3izt3wpJnLO3ODqoLK9fybz6Pj0DUTwD1Ayg19S/quGEP5hX NYtK23wiM3awERLUiCWPuZ6LHfqjQuI8gnYVbYlembPcyomV29m5iDbZBXHQwUJWdV4u xTwg== 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=3Fmp5Aum/Q0lSsstTxDNhvnSF9yiAFM0PKnVtUsONro=; b=KTkzZMFkR0xp08hhXtmhxlUud2DgG0gdA1C+qY4VX/3+z9W9LwotMQvZGumi6u1OX4 jorh+q0WSuMwFv6QwC6IVI/xk3SHUihhGHyD0ZfbKNxLtJ6c0xymcVOgkBfEMmg6eTrc 66yPy/wV1CRHmR0cH5SpkSZrTYT721ci9X8FpRH/Qs5wH/bxo+cKHMsA0YZOgSjThJ2h exoXW4cAs8nJEF+Slkt/RALipK7VSxE6r7OJV3Sk50Tff6tc0YPXoqO6yR7/R2Amclp6 nEBi3Tsd9cM/kVHJ2BQLlfCOEED+hdrcEi5LhbXO9dD3t018kZUW8x0tqZp8Gm/jey15 SKJw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=LgHBrF1E; 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 c6si18344161jab.33.2021.07.12.03.05.37; Mon, 12 Jul 2021 03:05:48 -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=LgHBrF1E; 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 S244896AbhGLH1p (ORCPT + 99 others); Mon, 12 Jul 2021 03:27:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:35446 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241431AbhGLHAq (ORCPT ); Mon, 12 Jul 2021 03:00:46 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id CCDEA61004; Mon, 12 Jul 2021 06:57:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626073077; bh=NNahF+fov1ZaCOcTBuZtRh7Qg7VDLkUNy31LawXhav4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LgHBrF1EkZPuYJU8/Z4MKE9hkRsPj0IFTJuVwAoU0c6wb/yriTJ14L19oAoAx+jsy Pjwt1kGtppUol3uXNe/oBlQ9QGk/Q/0XXjj3czlb2oybikNNstEnKoEbAlvETWTcO3 GdGho/T0+6kDG8orWDs8+bbElMvRkfW8R4FFWkrc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anatoly Trosinenko , Miklos Szeredi Subject: [PATCH 5.12 117/700] fuse: reject internal errno Date: Mon, 12 Jul 2021 08:03:20 +0200 Message-Id: <20210712060941.472655185@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060924.797321836@linuxfoundation.org> References: <20210712060924.797321836@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 @@ -1867,7 +1867,7 @@ 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);