From patchwork Sun Jul 19 07:21:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 1331702 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=eQNWVlLi; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4B8btT3yLnz9sTC for ; Sun, 19 Jul 2020 17:23:13 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726617AbgGSHXL (ORCPT ); Sun, 19 Jul 2020 03:23:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726510AbgGSHW7 (ORCPT ); Sun, 19 Jul 2020 03:22:59 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F6CEC0619D4; Sun, 19 Jul 2020 00:22:59 -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=wEfli0bKnmMvbqMdIzR/Xxdc4YVX2oyTOBz3cFFmjPM=; b=eQNWVlLigQ8j1rddf3jmicJZx/ GtNBrPzTkUM1ooKl/ABnGiwBXTw6+29KnUxFz8TSdzOgVQHsafoNyG4FKcY03h1LkjlCMih8OmYkv bDYT6HIXD1IY24dMuWWe9gvBTwsZvLPiBpoR0JrxwPT4+mGmRXal3CZYsk6yu/Z37IuIDdV8d8w56 nNOvzXBx6NWLd5rlnMJaSO+ZqT1HvktbQdIRQXlqfugWgwsqotNL9O1eyo0op36manXnRFG0NGTDw pb9YbF+RJ22+6F3ruXlvsaVi5p5ZJICDtE9ar5FZCdNCTHlV8O8LMmwLEWvDjIKWrTJCNRtwnh0Op j08FGj4Q==; 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 1jx3eu-0000Sy-A9; Sun, 19 Jul 2020 07:22:52 +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 17/51] sctp: pass a kernel pointer to sctp_setsockopt_associnfo Date: Sun, 19 Jul 2020 09:21:54 +0200 Message-Id: <20200719072228.112645-18-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 | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 6339a08b62dd2b..2a655c65e2943d 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -3105,26 +3105,25 @@ static int sctp_setsockopt_rtoinfo(struct sock *sk, * See [SCTP] for more information. * */ -static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsigned int optlen) +static int sctp_setsockopt_associnfo(struct sock *sk, + struct sctp_assocparams *assocparams, + unsigned int optlen) { - struct sctp_assocparams assocparams; struct sctp_association *asoc; if (optlen != sizeof(struct sctp_assocparams)) return -EINVAL; - if (copy_from_user(&assocparams, optval, optlen)) - return -EFAULT; - asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); + asoc = sctp_id2assoc(sk, assocparams->sasoc_assoc_id); - if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC && + if (!asoc && assocparams->sasoc_assoc_id != SCTP_FUTURE_ASSOC && sctp_style(sk, UDP)) return -EINVAL; /* Set the values to the specific association */ if (asoc) { - if (assocparams.sasoc_asocmaxrxt != 0) { + if (assocparams->sasoc_asocmaxrxt != 0) { __u32 path_sum = 0; int paths = 0; struct sctp_transport *peer_addr; @@ -3141,24 +3140,25 @@ static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsig * then one path. */ if (paths > 1 && - assocparams.sasoc_asocmaxrxt > path_sum) + assocparams->sasoc_asocmaxrxt > path_sum) return -EINVAL; - asoc->max_retrans = assocparams.sasoc_asocmaxrxt; + asoc->max_retrans = assocparams->sasoc_asocmaxrxt; } - if (assocparams.sasoc_cookie_life != 0) - asoc->cookie_life = ms_to_ktime(assocparams.sasoc_cookie_life); + if (assocparams->sasoc_cookie_life != 0) + asoc->cookie_life = + ms_to_ktime(assocparams->sasoc_cookie_life); } else { /* Set the values to the endpoint */ struct sctp_sock *sp = sctp_sk(sk); - if (assocparams.sasoc_asocmaxrxt != 0) + if (assocparams->sasoc_asocmaxrxt != 0) sp->assocparams.sasoc_asocmaxrxt = - assocparams.sasoc_asocmaxrxt; - if (assocparams.sasoc_cookie_life != 0) + assocparams->sasoc_asocmaxrxt; + if (assocparams->sasoc_cookie_life != 0) sp->assocparams.sasoc_cookie_life = - assocparams.sasoc_cookie_life; + assocparams->sasoc_cookie_life; } return 0; } @@ -4693,7 +4693,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen); break; case SCTP_ASSOCINFO: - retval = sctp_setsockopt_associnfo(sk, optval, optlen); + retval = sctp_setsockopt_associnfo(sk, kopt, optlen); break; case SCTP_I_WANT_MAPPED_V4_ADDR: retval = sctp_setsockopt_mappedv4(sk, optval, optlen);