From patchwork Thu May 21 17:47:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 218782 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 8DDC9C433DF for ; Thu, 21 May 2020 17:50:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D3BE20759 for ; Thu, 21 May 2020 17:50:01 +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="qN27vLKB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728897AbgEURuA (ORCPT ); Thu, 21 May 2020 13:50:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57944 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730278AbgEURsm (ORCPT ); Thu, 21 May 2020 13:48:42 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4BA6FC061A0E; Thu, 21 May 2020 10:48:42 -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=7HBY45D0CZ2sXVph0QcqI6+dgMRp0Ik5bZt6bdzdAxk=; b=qN27vLKB/YMyGK0kPGKRqbEhRu llfTFuEtI0nBdMcWj7Z2wKPnQYVkhd8xUViyZZstqF/jv5oHAlLq3+vYeqozGfsjbuDgugfPig6hu a6mkJvEPv0bZmWEcEK32O4m8K47zn3CZ3OASaxNvRwcP/f52JZaWohfM1ZJJsFLJXGSgbWV/bKUZ6 7gYYxPklySnpkEbTy5P9avbDPA3NpOGfUM1CGI84L8ugPjkFm8ev681WvRFemyIPYnxxVUthpMADN Uais7Cr8neEFRIHsunipeUF2J+xSygqesprSN+hQg926kq2OLv3wcdExtO5hMlr8xK7SHKpUmckVr HnJsgEyg==; 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 1jbpJA-0003JZ-NJ; Thu, 21 May 2020 17:48:41 +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 27/49] sctp: pass a kernel pointer to sctp_setsockopt_active_key Date: Thu, 21 May 2020 19:47:02 +0200 Message-Id: <20200521174724.2635475-28-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 | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index d3442dcd49aa8..88514a17654a7 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -3651,42 +3651,39 @@ static int sctp_setsockopt_auth_key(struct sock *sk, * the association shared key. */ static int sctp_setsockopt_active_key(struct sock *sk, - char __user *optval, + struct sctp_authkeyid *val, unsigned int optlen) { struct sctp_endpoint *ep = sctp_sk(sk)->ep; struct sctp_association *asoc; - struct sctp_authkeyid val; int ret = 0; if (optlen != sizeof(struct sctp_authkeyid)) return -EINVAL; - if (copy_from_user(&val, optval, optlen)) - return -EFAULT; - asoc = sctp_id2assoc(sk, val.scact_assoc_id); - if (!asoc && val.scact_assoc_id > SCTP_ALL_ASSOC && + asoc = sctp_id2assoc(sk, val->scact_assoc_id); + if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC && sctp_style(sk, UDP)) return -EINVAL; if (asoc) - return sctp_auth_set_active_key(ep, asoc, val.scact_keynumber); + return sctp_auth_set_active_key(ep, asoc, val->scact_keynumber); if (sctp_style(sk, TCP)) - val.scact_assoc_id = SCTP_FUTURE_ASSOC; + val->scact_assoc_id = SCTP_FUTURE_ASSOC; - if (val.scact_assoc_id == SCTP_FUTURE_ASSOC || - val.scact_assoc_id == SCTP_ALL_ASSOC) { - ret = sctp_auth_set_active_key(ep, asoc, val.scact_keynumber); + if (val->scact_assoc_id == SCTP_FUTURE_ASSOC || + val->scact_assoc_id == SCTP_ALL_ASSOC) { + ret = sctp_auth_set_active_key(ep, asoc, val->scact_keynumber); if (ret) return ret; } - if (val.scact_assoc_id == SCTP_CURRENT_ASSOC || - val.scact_assoc_id == SCTP_ALL_ASSOC) { + if (val->scact_assoc_id == SCTP_CURRENT_ASSOC || + val->scact_assoc_id == SCTP_ALL_ASSOC) { list_for_each_entry(asoc, &ep->asocs, asocs) { int res = sctp_auth_set_active_key(ep, asoc, - val.scact_keynumber); + val->scact_keynumber); if (res && !ret) ret = res; @@ -4685,7 +4682,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_auth_key(sk, kopt, optlen); break; case SCTP_AUTH_ACTIVE_KEY: - retval = sctp_setsockopt_active_key(sk, optval, optlen); + retval = sctp_setsockopt_active_key(sk, kopt, optlen); break; case SCTP_AUTH_DELETE_KEY: retval = sctp_setsockopt_del_key(sk, optval, optlen);