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=-9.6 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 631FEC433E1 for ; Thu, 21 May 2020 17:48:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3CA5F20829 for ; Thu, 21 May 2020 17:48:18 +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="mD5WHemw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730144AbgEURsQ (ORCPT ); Thu, 21 May 2020 13:48:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727966AbgEURsO (ORCPT ); Thu, 21 May 2020 13:48:14 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 917A9C061A0E; Thu, 21 May 2020 10:48:14 -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=Fw5nGx5iNocIYr+4Z6YLggjghVsrFkUZRCH/JS2bxRs=; b=mD5WHemwvPX5CN+ZYPSwgVjB9v sWKC0k/povdSEjWJz7G2t9pT5e3uHf7+uL7JOJYYWCROel/TY9PTmoy5RjP0l1L1kGIvN5S62t5Zl eMroxuj1t0ghXjHH0+gZW37nb4AD79sm7eHt4XkXkBYSufrhI4P99BCvBHmZY2FlrTLvp/hJUTgEv ALnmQEg8vpvBELSNnj1epyDwLXWcfx03kV+BE20KedIlCxxf/S1KOKa5Dz820pC8WCj6QaSJzEQdd KxClXJ7V3KqX7z87aQX8BBJIBCMyhpv8Ir9LTlzdnJF9mC090k9p4Kc+RDgA1/E4Sv+ZutwHcSrqc TQakRqAQ==; 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 1jbpIa-0003DH-6P; Thu, 21 May 2020 17:48:04 +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 13/49] sctp: pass a kernel pointer to sctp_setsockopt_primary_addr Date: Thu, 21 May 2020 19:46:48 +0200 Message-Id: <20200521174724.2635475-14-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 Content-Transfer-Encoding: 8bit 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 | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 53bd58a5cc954..df00342ac74f9 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -2979,10 +2979,9 @@ 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; @@ -2990,21 +2989,18 @@ 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; @@ -4692,7 +4688,7 @@ 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); -- 2.26.2