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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 820FFC4346A for ; Sun, 19 Jul 2020 07:24:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5B5B0207FC for ; Sun, 19 Jul 2020 07:24:26 +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="rK/8t27O" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726177AbgGSHWr (ORCPT ); Sun, 19 Jul 2020 03:22:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726021AbgGSHWq (ORCPT ); Sun, 19 Jul 2020 03:22:46 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0797C0619D6; Sun, 19 Jul 2020 00:22:45 -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=YBJS0U3N0bDQziBJ4kOs9IwL4IuPhddysJqMqBUV/ec=; b=rK/8t27OwFtYKhAKxApWZpGR2o 9GTMCQsq+AGcJEuMmUWxhx63LJZvKErSTdxJQ0PGp0YTABkVWqLXF4ZL2Bcnjhm5C3X5P2elOdOeY 3juXrw5dMNvFhKCDPJTnSa0ocPvRF3452GLz+UGn8mgk5Pw48X1+T1E/7r2iYSEqF+4ZvydzD3nUQ O7WCdy3SL13MxdrMBKfK62K2KTzc3pvfyYI270oro/lbdtcaqXXbra59wjNJ0ro4b4o+7MX14CIVT 5ZuffG22mgPjfP1N5PNS9CjBoUBkqm6A6y4Zut7Lc3DYQOa3Txem8NsHdXiw7cdrVPS2IHYP2tR53 1cW1/ZUQ==; 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 1jx3eY-0000PW-Kx; Sun, 19 Jul 2020 07:22:31 +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 01/51] sctp: copy the optval from user space in sctp_setsockopt Date: Sun, 19 Jul 2020 09:21:38 +0200 Message-Id: <20200719072228.112645-2-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 Content-Transfer-Encoding: 8bit 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 Prepare for for moving the copy_from_user from the individual sockopts to the main setsockopt helper. As of this commit the kopt variable is not used yet, but the following commits will start using it. Signed-off-by: Christoph Hellwig --- net/sctp/socket.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index d57e1a002ffc8f..af1ebc8313d303 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4677,6 +4677,7 @@ static int sctp_setsockopt_pf_expose(struct sock *sk, static int sctp_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) { + void *kopt = NULL; int retval = 0; pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname); @@ -4693,6 +4694,12 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, goto out_nounlock; } + if (optlen > 0) { + kopt = memdup_user(optval, optlen); + if (IS_ERR(kopt)) + return PTR_ERR(kopt); + } + lock_sock(sk); switch (optname) { @@ -4878,6 +4885,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, } release_sock(sk); + kfree(kopt); out_nounlock: return retval; -- 2.27.0