From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 EA9C0C43603 for ; Wed, 18 Dec 2019 06:12:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C322C20733 for ; Wed, 18 Dec 2019 06:12:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725882AbfLRGM5 (ORCPT ); Wed, 18 Dec 2019 01:12:57 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:12925 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725810AbfLRGM5 (ORCPT ); Wed, 18 Dec 2019 01:12:57 -0500 X-IronPort-AV: E=Sophos;i="5.69,328,1571673600"; d="scan'208";a="80452651" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 18 Dec 2019 14:12:54 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id D27F64CE1C91; Wed, 18 Dec 2019 14:04:11 +0800 (CST) Received: from localhost.localdomain (10.167.220.84) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 18 Dec 2019 14:12:54 +0800 From: Yang Xu To: CC: , Yang Xu Subject: [PATCH] userfaultfd.2: add EPERM error Date: Wed, 18 Dec 2019 14:13:07 +0800 Message-ID: <1576649587-20008-1-git-send-email-xuyang2018.jy@cn.fujitsu.com> X-Mailer: git-send-email 1.8.3.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.167.220.84] X-yoursite-MailScanner-ID: D27F64CE1C91.AE069 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: xuyang2018.jy@cn.fujitsu.com Sender: linux-man-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Signed-off-by: Yang Xu --- man2/userfaultfd.2 | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/man2/userfaultfd.2 b/man2/userfaultfd.2 index 8d0a66ed9..2b432f043 100644 --- a/man2/userfaultfd.2 +++ b/man2/userfaultfd.2 @@ -440,6 +440,11 @@ reached. .TP .B ENOMEM Insufficient kernel memory was available. +.TP +.B EPERM +Unprivileged user(without SYS_CAP_PTRACE capability) uses this call when +set unprivileged_userfaultfd to 0. It was introduced since Linux 5.2. +.\" cefdca0a86be517bc390fc4541e3674b8e7803b0 .SH VERSIONS The .BR userfaultfd () -- 2.18.0