From patchwork Thu May 21 17:46:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 218799 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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 3A91AC433E0 for ; Thu, 21 May 2020 17:48:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09FDF207F7 for ; Thu, 21 May 2020 17:48:23 +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="n9+DIAws" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730173AbgEURsW (ORCPT ); Thu, 21 May 2020 13:48:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727966AbgEURsU (ORCPT ); Thu, 21 May 2020 13:48:20 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35E67C061A0E; Thu, 21 May 2020 10:48:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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=UijWnm5eSd4PckpUS4Tjc81iEuS4R7Ony9OCzxMc32s=; b=n9+DIAwski1au5E155UrPL9GNd 8tCvRPE3bjsqn2TiUFNyzw8AWHinKaSsYQ9iEVfU3Tc57D3589eOcrhAcTU05AAE2/0ZDuJUA9026 2Anfis4VL28nq8Kwm5vCGiUznSzWLdYfl/Pv1d+0GamUao7dxLjsXgFjEghgL4bUD3YX84fxQ0ocP 7VRSng56nIL9EoStL5y75zBIbDVB4YL638zXiK7Nt995PK6Lelphgq/cVJy+ylGl21ZcOsv09KFiv YP6Rjiq4soQkmoLBhtyOk2OyzkPrKWITAX7qDmsnfhMaCDNUKJsSS98GAahmYaynqqSqxlQynWK50 3bUdb2AQ==; Received: from [2001:4bb8:18c:5da7:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbpIf-0003Ec-81; Thu, 21 May 2020 17:48:09 +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 15/49] sctp: pass a kernel pointer to sctp_setsockopt_nodelay Date: Thu, 21 May 2020 19:46:50 +0200 Message-Id: <20200521174724.2635475-16-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200521174724.2635475-1-hch@lst.de> References: <20200521174724.2635475-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.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 | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index eb01992da7949..99df37bbcb903 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -3017,17 +3017,12 @@ static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim, * introduced, at the cost of more packets in the network. Expects an * integer boolean flag. */ -static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, +static int sctp_setsockopt_nodelay(struct sock *sk, int *val, unsigned int optlen) { - int val; - if (optlen < sizeof(int)) return -EINVAL; - if (get_user(val, (int __user *)optval)) - return -EFAULT; - - sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1; + sctp_sk(sk)->nodelay = (*val == 0) ? 0 : 1; return 0; } @@ -4691,7 +4686,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_peer_primary_addr(sk, kopt, optlen); break; case SCTP_NODELAY: - retval = sctp_setsockopt_nodelay(sk, optval, optlen); + retval = sctp_setsockopt_nodelay(sk, kopt, optlen); break; case SCTP_RTOINFO: retval = sctp_setsockopt_rtoinfo(sk, optval, optlen);