From patchwork Sun Jul 19 07:21:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 1331696 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=JGqS1ajK; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4B8btR12WKz9sSt for ; Sun, 19 Jul 2020 17:23:11 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726503AbgGSHW6 (ORCPT ); Sun, 19 Jul 2020 03:22:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52474 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726419AbgGSHWy (ORCPT ); Sun, 19 Jul 2020 03:22:54 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29C6CC0619D6; Sun, 19 Jul 2020 00:22:54 -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=EocU4PatEiZcQw9QG/xMA5XqMNtT3B2IIsEvr/owMXM=; b=JGqS1ajK6W6O+CHTncEVBWeQ6s SRuxcd+pBgPwNmc3BWcqdYcZObiR5exVAunPvml7Rl75aSD8C/xiY+u11HriLp6nDuozLRl7UH0/0 jonFH7cy4C6Ca6DVZjzYUGntXdUBi3irm5bWeaKz4GatvCxtB4/Kl8XxUbAh2TA1o5uLiq6xS/M76 zQENbqImnoaOcZZu8RDaFa+hjdxcnJblYUP+opoYeVaRIYZzVxlltULwJi9dpuKJBPUGjQfLtQz+2 7TZjDtuehtyKfFkUK58WWRZRmO4WfBq8zes/AJU+8OFESmnSTKzQUwN05B72EQzWD2btO2ZbELiyu 9wAYMKpA==; 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 1jx3ep-0000SI-8J; Sun, 19 Jul 2020 07:22:47 +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 13/51] sctp: pass a kernel pointer to sctp_setsockopt_primary_addr Date: Sun, 19 Jul 2020 09:21:50 +0200 Message-Id: <20200719072228.112645-14-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 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 | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 6695fa1cb0ca8f..abdec7b412bcbc 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -2982,10 +2982,9 @@ static int sctp_setsockopt_default_sndinfo(struct sock *sk, * the association primary. The enclosed address must be one of the * association peer's addresses. */ -static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, +static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim, unsigned int optlen) { - struct sctp_prim prim; struct sctp_transport *trans; struct sctp_af *af; int err; @@ -2993,21 +2992,18 @@ static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, if (optlen != sizeof(struct sctp_prim)) return -EINVAL; - if (copy_from_user(&prim, optval, sizeof(struct sctp_prim))) - return -EFAULT; - /* Allow security module to validate address but need address len. */ - af = sctp_get_af_specific(prim.ssp_addr.ss_family); + af = sctp_get_af_specific(prim->ssp_addr.ss_family); if (!af) return -EINVAL; err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR, - (struct sockaddr *)&prim.ssp_addr, + (struct sockaddr *)&prim->ssp_addr, af->sockaddr_len); if (err) return err; - trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id); + trans = sctp_addr_id2transport(sk, &prim->ssp_addr, prim->ssp_assoc_id); if (!trans) return -EINVAL; @@ -4695,7 +4691,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_default_sndinfo(sk, kopt, optlen); break; case SCTP_PRIMARY_ADDR: - retval = sctp_setsockopt_primary_addr(sk, optval, optlen); + retval = sctp_setsockopt_primary_addr(sk, kopt, optlen); break; case SCTP_SET_PEER_PRIMARY_ADDR: retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen);