Received: by 2002:a05:6a10:1287:0:0:0:0 with SMTP id d7csp4162551pxv; Mon, 19 Jul 2021 18:56:23 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyS0s5yqfJ/pRD4jWOQwqKPUJg5kqRDtD++lmpNXLM87JCM1NbZDnFBYMnxefivfTdJ/aMt X-Received: by 2002:a05:6e02:1c02:: with SMTP id l2mr19160867ilh.9.1626746183494; Mon, 19 Jul 2021 18:56:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1626746183; cv=none; d=google.com; s=arc-20160816; b=V6GarCrb6YM9X0tPBvHGpqqaiZl6t22vtF7jqMXLMoxvCDIhF9LgdIMdeCX6clJUB7 Z/451jFPLF4R4KBUSMwYLo84frHDKMkbTZ+qvfd1V1K+Qk4NNDYU1SQ/nBck5ojNgL5C eswUPPzCqwV8VZy9qub+E5nQPZU9zkdPVpdIh6/SPLqLZflaQqsvIdGi+5sVfLb+QlEH kM1ltktU/DUkcnCtSdM1x5Ok6wLlkrgtO73CRb8fpVu9SUDp92YVqIJkFWFqs4adyYM1 D0KgGEAE9hG/wOzkIWgAcjKaJ5fqS2c+HVpvLyc9TyfTsjMSy3vEPAiQXXPbrFPWGIpz kpqg== 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=ck2v5e4mqCgnun3hAqRTU3ah0AuCCTn9rl02XF5tQbc=; b=NKXJ4LGVemmQx7PjEcfjD+CX49y8p+EGxcAnH85H5nSo6nYtvKmYwNUh9Z46wP+aDr I8rRd5Up0OWc3DrrKwQoHhaQisoJhttDg+52NXCQ7kA0pde8PgFwJsagUjkZdKGSkXMY fn85mw2kAWtgehbVvEnCTf7/cupZSIgn/rb5b48z6tHX+4UYINIFgckE+BikcASMe/3S /eOGYO4wI9kaMHcC1nfgQO4XNjm5i/NDc8kYzA1RbwpMNOrZWXPPOOYqSyhPYHMgyd3x 3DQBkzA3DGv3crKn9Gm8ybGdeFWwJ3N9B1/UnF3Sz3X2QkRQL4av9W/9MUQYp9bGfnKb mv8A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=o8yptGg2; 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 q7si22260344ioi.41.2021.07.19.18.56.10; Mon, 19 Jul 2021 18:56:23 -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=o8yptGg2; 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 S1347111AbhGSPTB (ORCPT + 99 others); Mon, 19 Jul 2021 11:19:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:60580 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237760AbhGSOoY (ORCPT ); Mon, 19 Jul 2021 10:44:24 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0AE9261289; Mon, 19 Jul 2021 15:22:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626708160; bh=gxhcqkHoM/1Y1HETiG7A29+Ysk5Z7gPNT4XZ4ymtUBE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o8yptGg2tTZOGBSiENMFQuzt4cCMIn1tTwZt2OlWnOD2VtSxsTJfDnwd0A6tAx4Dn s1Z7La7aisHqonTTsVX0MOOW6AEodiaIzHztUEoQMlWwqj58dF1mlbiYA0tkm2WurH UR9N2lmFYWA7oe9BrMv9Dzh4ua7svs0elecyskGc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anatoly Trosinenko , Miklos Szeredi Subject: [PATCH 4.14 204/315] fuse: reject internal errno Date: Mon, 19 Jul 2021 16:51:33 +0200 Message-Id: <20210719144950.137738648@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144942.861561397@linuxfoundation.org> References: <20210719144942.861561397@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 @@ -1889,7 +1889,7 @@ 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);