From patchwork Wed Oct 7 18:40:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rohit Maheshwari X-Patchwork-Id: 11821589 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, 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 CD29FC4363C for ; Wed, 7 Oct 2020 18:40:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61C5B2176B for ; Wed, 7 Oct 2020 18:40:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728119AbgJGSk3 (ORCPT ); Wed, 7 Oct 2020 14:40:29 -0400 Received: from stargate.chelsio.com ([12.32.117.8]:21676 "EHLO stargate.chelsio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726323AbgJGSk3 (ORCPT ); Wed, 7 Oct 2020 14:40:29 -0400 Received: from localhost.localdomain (redhouse.blr.asicdesigners.com [10.193.185.57]) by stargate.chelsio.com (8.13.8/8.13.8) with ESMTP id 097IeMDB023806; Wed, 7 Oct 2020 11:40:23 -0700 From: Rohit Maheshwari To: kuba@kernel.org, netdev@vger.kernel.org, davem@davemloft.net Cc: secdev@chelsio.com, Rohit Maheshwari Subject: [PATCH net v3] net/tls: sendfile fails with ktls offload Date: Thu, 8 Oct 2020 00:10:21 +0530 Message-Id: <20201007184021.27584-1-rohitm@chelsio.com> X-Mailer: git-send-email 2.18.1 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org At first when sendpage gets called, if there is more data, 'more' in tls_push_data() gets set which later sets pending_open_record_frags, but when there is no more data in file left, and last time tls_push_data() gets called, pending_open_record_frags doesn't get reset. And later when 2 bytes of encrypted alert comes as sendmsg, it first checks for pending_open_record_frags, and since this is set, it creates a record with 0 data bytes to encrypt, meaning record length is prepend_size + tag_size only, which causes problem. We should set/reset pending_open_record_frags based on more bit. Fixes: d829e9c4112b ("tls: convert to generic sk_msg interface") Signed-off-by: Rohit Maheshwari Signed-off-by: Jakub Kicinski --- net/tls/tls_device.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c index b74e2741f74f..cec86229a6a0 100644 --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -418,14 +418,14 @@ static int tls_push_data(struct sock *sk, struct tls_context *tls_ctx = tls_get_ctx(sk); struct tls_prot_info *prot = &tls_ctx->prot_info; struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); - int more = flags & (MSG_SENDPAGE_NOTLAST | MSG_MORE); struct tls_record_info *record = ctx->open_record; int tls_push_record_flags; struct page_frag *pfrag; size_t orig_size = size; u32 max_open_record_len; - int copy, rc = 0; + bool more = false; bool done = false; + int copy, rc = 0; long timeo; if (flags & @@ -492,9 +492,8 @@ static int tls_push_data(struct sock *sk, if (!size) { last_record: tls_push_record_flags = flags; - if (more) { - tls_ctx->pending_open_record_frags = - !!record->num_frags; + if (flags & (MSG_SENDPAGE_NOTLAST | MSG_MORE)) { + more = true; break; } @@ -526,6 +525,8 @@ static int tls_push_data(struct sock *sk, } } while (!done); + tls_ctx->pending_open_record_frags = more; + if (orig_size - size > 0) rc = orig_size - size;