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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 84EC1C43469 for ; Sun, 19 Jul 2020 07:24:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61E3D207FC for ; Sun, 19 Jul 2020 07:24:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="vurpB6GE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727103AbgGSHY1 (ORCPT ); Sun, 19 Jul 2020 03:24:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726359AbgGSHWu (ORCPT ); Sun, 19 Jul 2020 03:22:50 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18558C0619D2; Sun, 19 Jul 2020 00:22:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=BbEXe2CwIjzrfU+0nbl470wmFzJmGW9yvHic1d8Ms0w=; b=vurpB6GEazg1CR6ssBpDQZowrS inwdLYTVGZE+jEyT/M4aRzMtGeJzSFFzdPI071VBHHLMamEx2B/0OZe7rBFtqm+rB+pTn9oBvvDAd W7ri17XOoK4b3n2SYb+hmTfKq5Vm+UdCsT4wVZ4mrkaqiFZyvGtxkvmtq3Kbvc+6OthbGEhwTg0mg N1l4rhWT2aQmW5VIh3e88BLJtTdrVWGhgruf5n0dKGmd1f8g+0VD/xBrcpJz19GrrADITfGkZtabG j4XhS2OIdQSie4P5k/UTLBbTby7tdwEBucbsZyt6vyER0XwutlG9vEfV1DevjwgBhGDScROvMPah5 Qv4nGq0Q==; Received: from [2001:4bb8:105:4a81:4ef5:9f24:cda4:103f] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jx3el-0000Rd-8C; Sun, 19 Jul 2020 07:22:43 +0000 From: Christoph Hellwig To: Vlad Yasevich , Neil Horman , Marcelo Ricardo Leitner Cc: "David S. Miller" , Jakub Kicinski , David Laight , linux-sctp@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 10/51] sctp: pass a kernel pointer to sctp_setsockopt_initmsg Date: Sun, 19 Jul 2020 09:21:47 +0200 Message-Id: <20200719072228.112645-11-hch@lst.de> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200719072228.112645-1-hch@lst.de> References: <20200719072228.112645-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Use the kernel pointer that sctp_setsockopt has available instead of directly handling the user pointer. Signed-off-by: Christoph Hellwig --- net/sctp/socket.c | 24 +++++++++++------------- 1 file changed, 11 insertions(+), 13 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index deccfe54d2fc7d..d62c02d0b79346 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -2832,24 +2832,22 @@ static int sctp_setsockopt_delayed_ack(struct sock *sk, * by the change). With TCP-style sockets, this option is inherited by * sockets derived from a listener socket. */ -static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen) +static int sctp_setsockopt_initmsg(struct sock *sk, struct sctp_initmsg *sinit, + unsigned int optlen) { - struct sctp_initmsg sinit; struct sctp_sock *sp = sctp_sk(sk); if (optlen != sizeof(struct sctp_initmsg)) return -EINVAL; - if (copy_from_user(&sinit, optval, optlen)) - return -EFAULT; - if (sinit.sinit_num_ostreams) - sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams; - if (sinit.sinit_max_instreams) - sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams; - if (sinit.sinit_max_attempts) - sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts; - if (sinit.sinit_max_init_timeo) - sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo; + if (sinit->sinit_num_ostreams) + sp->initmsg.sinit_num_ostreams = sinit->sinit_num_ostreams; + if (sinit->sinit_max_instreams) + sp->initmsg.sinit_max_instreams = sinit->sinit_max_instreams; + if (sinit->sinit_max_attempts) + sp->initmsg.sinit_max_attempts = sinit->sinit_max_attempts; + if (sinit->sinit_max_init_timeo) + sp->initmsg.sinit_max_init_timeo = sinit->sinit_max_init_timeo; return 0; } @@ -4694,7 +4692,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, break; case SCTP_INITMSG: - retval = sctp_setsockopt_initmsg(sk, optval, optlen); + retval = sctp_setsockopt_initmsg(sk, kopt, optlen); break; case SCTP_DEFAULT_SEND_PARAM: retval = sctp_setsockopt_default_send_param(sk, optval, -- 2.27.0