From patchwork Thu May 21 17:47:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 218787 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 35244C433E0 for ; Thu, 21 May 2020 17:49:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 00CFD20826 for ; Thu, 21 May 2020 17:49:29 +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="qe00OQKr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730470AbgEURt2 (ORCPT ); Thu, 21 May 2020 13:49:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730453AbgEURtY (ORCPT ); Thu, 21 May 2020 13:49:24 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B779C061A0E; Thu, 21 May 2020 10:49:24 -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=5tPMqSURDR0UDtFhBlgZgSBiCIrl7O1eqcFWzN5W/kc=; b=qe00OQKrwINSDpPOYY23V/knsH SZ6ZWydSb8vc2DrkNpmkuu9Zh2rr/N8jgJwtK7qTHDtmGuU8oPa5Cg5dc+u0MgcE7N9uotikWbzMq uR/fThZFTjUHrcEiT+SOLHyZ3fjV5wJJ7G0oeCI1v01tX5JdpAq1TmHigqC4dTSZQLY8rDfxveufh syccO0IKmZefG3KM8sf4hI3X7NROVPuCz0W6fmI1sQTWHyqhcBVf+9Fk0b7EjKPPfxglzrtp6Wc/X AkZkzrwKchQ9ZjMpokta9wxFHkMS65hnxiskp98HH9IOmcf8DLrGdBn2/RUekj/IhlmIHmTK8C0oi 6vzLecWg==; 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 1jbpJn-0003QM-VC; Thu, 21 May 2020 17:49:20 +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 42/49] sctp: pass a kernel pointer to sctp_setsockopt_scheduler_value Date: Thu, 21 May 2020 19:47:17 +0200 Message-Id: <20200521174724.2635475-43-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 | 26 ++++++++++---------------- 1 file changed, 10 insertions(+), 16 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 122e6b95a8f0d..4d61c2885f8f2 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4154,38 +4154,32 @@ static int sctp_setsockopt_scheduler(struct sock *sk, } static int sctp_setsockopt_scheduler_value(struct sock *sk, - char __user *optval, + struct sctp_stream_value *params, unsigned int optlen) { - struct sctp_stream_value params; struct sctp_association *asoc; int retval = -EINVAL; - if (optlen < sizeof(params)) - goto out; - - optlen = sizeof(params); - if (copy_from_user(¶ms, optval, optlen)) { - retval = -EFAULT; + if (optlen < sizeof(*params)) goto out; - } - asoc = sctp_id2assoc(sk, params.assoc_id); - if (!asoc && params.assoc_id != SCTP_CURRENT_ASSOC && + asoc = sctp_id2assoc(sk, params->assoc_id); + if (!asoc && params->assoc_id != SCTP_CURRENT_ASSOC && sctp_style(sk, UDP)) goto out; if (asoc) { - retval = sctp_sched_set_value(asoc, params.stream_id, - params.stream_value, GFP_KERNEL); + retval = sctp_sched_set_value(asoc, params->stream_id, + params->stream_value, GFP_KERNEL); goto out; } retval = 0; list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) { - int ret = sctp_sched_set_value(asoc, params.stream_id, - params.stream_value, GFP_KERNEL); + int ret = sctp_sched_set_value(asoc, params->stream_id, + params->stream_value, + GFP_KERNEL); if (ret && !retval) /* try to return the 1st error. */ retval = ret; } @@ -4654,7 +4648,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_scheduler(sk, kopt, optlen); break; case SCTP_STREAM_SCHEDULER_VALUE: - retval = sctp_setsockopt_scheduler_value(sk, optval, optlen); + retval = sctp_setsockopt_scheduler_value(sk, kopt, optlen); break; case SCTP_INTERLEAVING_SUPPORTED: retval = sctp_setsockopt_interleaving_supported(sk, optval,