From patchwork Tue Mar 3 17:41:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 229867 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 6F57AC3F2D7 for ; Tue, 3 Mar 2020 18:13:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B7422072D for ; Tue, 3 Mar 2020 18:13:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583259217; bh=udgEv1Fif3gvgXkHWGgmEjq1T17SCOrEkis2l10MF7Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=E/OxSC0YURVeLLT1ZTarENGGR0gfXf6OOUOvLk8fb2VynW7vPXCqL49Ho6f4w4OTS J7rH/F5TA+vaIzuQ7ipOkfleDZoRIFNi0e7818wXPfjXGgrtE0tcxo8SbQKMrcIvYk /i6q1j/av5rGTqV1wnGPycHgiiXi0le4p3XqqQ1Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731050AbgCCRqE (ORCPT ); Tue, 3 Mar 2020 12:46:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:52434 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729625AbgCCRqD (ORCPT ); Tue, 3 Mar 2020 12:46:03 -0500 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 26D9320870; Tue, 3 Mar 2020 17:46:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583257562; bh=udgEv1Fif3gvgXkHWGgmEjq1T17SCOrEkis2l10MF7Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dh47tWMWTuBKcSr7JpUg8J9MIznwN3Akcv/MuJJhgtJROjswJ3DYGlNIocgtGSO3/ qdWvdT9c/A75WtmMIt6m+orNu6Mdu0tvzpOOW/7XMhkMc2Ia6mJPm1svQeBIHaAhU1 c2TGns1r7BE+MF3wnib8QZkvtnOISJGH8fFPaxRw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rohit Maheshwari , Jakub Kicinski , "David S. Miller" Subject: [PATCH 5.5 008/176] net/tls: Fix to avoid gettig invalid tls record Date: Tue, 3 Mar 2020 18:41:12 +0100 Message-Id: <20200303174305.526890311@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200303174304.593872177@linuxfoundation.org> References: <20200303174304.593872177@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Rohit Maheshwari [ Upstream commit 06f5201c6392f998a49ca9c9173e2930c8eb51d8 ] Current code doesn't check if tcp sequence number is starting from (/after) 1st record's start sequnce number. It only checks if seq number is before 1st record's end sequnce number. This problem will always be a possibility in re-transmit case. If a record which belongs to a requested seq number is already deleted, tls_get_record will start looking into list and as per the check it will look if seq number is before the end seq of 1st record, which will always be true and will return 1st record always, it should in fact return NULL. As part of the fix, start looking each record only if the sequence number lies in the list else return NULL. There is one more check added, driver look for the start marker record to handle tcp packets which are before the tls offload start sequence number, hence return 1st record if the record is tls start marker and seq number is before the 1st record's starting sequence number. Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure") Signed-off-by: Rohit Maheshwari Reviewed-by: Jakub Kicinski Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/tls/tls_device.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -592,7 +592,7 @@ struct tls_record_info *tls_get_record(s u32 seq, u64 *p_record_sn) { u64 record_sn = context->hint_record_sn; - struct tls_record_info *info; + struct tls_record_info *info, *last; info = context->retransmit_hint; if (!info || @@ -604,6 +604,24 @@ struct tls_record_info *tls_get_record(s struct tls_record_info, list); if (!info) return NULL; + /* send the start_marker record if seq number is before the + * tls offload start marker sequence number. This record is + * required to handle TCP packets which are before TLS offload + * started. + * And if it's not start marker, look if this seq number + * belongs to the list. + */ + if (likely(!tls_record_is_start_marker(info))) { + /* we have the first record, get the last record to see + * if this seq number belongs to the list. + */ + last = list_last_entry(&context->records_list, + struct tls_record_info, list); + + if (!between(seq, tls_record_start_seq(info), + last->end_seq)) + return NULL; + } record_sn = context->unacked_record_sn; }