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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 F1753C433DF for ; Mon, 1 Jun 2020 18:48:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C85012073B for ; Mon, 1 Jun 2020 18:48:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591037305; bh=oUUrow9BaLigfYLgQvV/CONmfTcm9hlUNd3VeXm6wCo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jmPbKmLg26B1bHeOuCJyrgsgNXaHVq/L2ycEFc/cnQ5WVasQyV12VFb44JhVTvaeL fPaafGhh6Iu57FNBZ4B38UVIH0k1BjkPiJne3UAg76WlOHzcmnBLD0tE/Cq/sHDGRQ YMTEhSK3UdQ5R3KhCAAwf24Ts8KtW4UYLgoXxwtk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730606AbgFASHh (ORCPT ); Mon, 1 Jun 2020 14:07:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:52738 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728833AbgFASG6 (ORCPT ); Mon, 1 Jun 2020 14:06:58 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 824C4207D0; Mon, 1 Jun 2020 18:06:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591034818; bh=oUUrow9BaLigfYLgQvV/CONmfTcm9hlUNd3VeXm6wCo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OD53EG6kOA3xY1bnTzxCXtM+k7pvtTNURJe8/MqZbe601eMt/croMZ2iB2wNvt5CH RHhecZwv0c1lfrUmVn+DtH0I5moXwS6XGzBtV2jLnaa6Vhg0kIAYUQbT1PNxmf2q/0 5USkoJsH73IaUoHuY1HDUan7TVCiq11o+fyc1dvs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vadim Fedorenko , "David S. Miller" Subject: [PATCH 5.4 027/142] net/tls: fix encryption error checking Date: Mon, 1 Jun 2020 19:53:05 +0200 Message-Id: <20200601174040.718668506@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200601174037.904070960@linuxfoundation.org> References: <20200601174037.904070960@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vadim Fedorenko commit a7bff11f6f9afa87c25711db8050c9b5324db0e2 upstream. bpf_exec_tx_verdict() can return negative value for copied variable. In that case this value will be pushed back to caller and the real error code will be lost. Fix it using signed type and checking for positive value. Fixes: d10523d0b3d7 ("net/tls: free the record on encryption error") Fixes: d3b18ad31f93 ("tls: add bpf support to sk_msg handling") Signed-off-by: Vadim Fedorenko Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/tls/tls_sw.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -781,7 +781,7 @@ static int tls_push_record(struct sock * static int bpf_exec_tx_verdict(struct sk_msg *msg, struct sock *sk, bool full_record, u8 record_type, - size_t *copied, int flags) + ssize_t *copied, int flags) { struct tls_context *tls_ctx = tls_get_ctx(sk); struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); @@ -917,7 +917,8 @@ int tls_sw_sendmsg(struct sock *sk, stru unsigned char record_type = TLS_RECORD_TYPE_DATA; bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); bool eor = !(msg->msg_flags & MSG_MORE); - size_t try_to_copy, copied = 0; + size_t try_to_copy; + ssize_t copied = 0; struct sk_msg *msg_pl, *msg_en; struct tls_rec *rec; int required_size; @@ -1126,7 +1127,7 @@ send_end: release_sock(sk); mutex_unlock(&tls_ctx->tx_lock); - return copied ? copied : ret; + return copied > 0 ? copied : ret; } static int tls_sw_do_sendpage(struct sock *sk, struct page *page, @@ -1140,7 +1141,7 @@ static int tls_sw_do_sendpage(struct soc struct sk_msg *msg_pl; struct tls_rec *rec; int num_async = 0; - size_t copied = 0; + ssize_t copied = 0; bool full_record; int record_room; int ret = 0; @@ -1242,7 +1243,7 @@ wait_for_memory: } sendpage_end: ret = sk_stream_error(sk, flags, ret); - return copied ? copied : ret; + return copied > 0 ? copied : ret; } int tls_sw_sendpage_locked(struct sock *sk, struct page *page,