From patchwork Wed May 13 09:44:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 225956 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=-6.9 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,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 A25C1CA90AF for ; Wed, 13 May 2020 09:59:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7324E206B8 for ; Wed, 13 May 2020 09:59:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589363996; bh=SOZ803+YXS9HbFLuIMPYmRKdBHR5d0s6fTcBtxPZYY0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WrfuuKQL0SksUaEdyr4nxaWckQFmnILrdLFry8QwXpQZDHYu4WZH9VjI8iAQVOtXV wAgyBkqCnVMUnSqAlGlSQjMbpwjUm2h34qGqK1ZwVmOT4TN6fENbYuRB/O56YPG8uI /w8ZI8o1NQ1ONJP9PwMNOM+toebLYlaOQR9EPLpg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388124AbgEMJ7z (ORCPT ); Wed, 13 May 2020 05:59:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:54394 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733286AbgEMJws (ORCPT ); Wed, 13 May 2020 05:52:48 -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 4FB1120753; Wed, 13 May 2020 09:52:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589363567; bh=SOZ803+YXS9HbFLuIMPYmRKdBHR5d0s6fTcBtxPZYY0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HWvJLof4Qtar3wQRwzvojZhY5B9E10snMLjYfkbSg9wDY4VDpkURERuMy3NfWE7zA wz76apV/K77ce3JXVXL/gQ/jLQltI4suIHspROgU6g0sMGh9CSSGk63tugd2UrpKtR LoO7UkHT2S6di8D1v7/1roZTiCNwIZ/88JjltO7Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eric Dumazet , Arjun Roy , Soheil Hassas Yeganeh , "David S. Miller" Subject: [PATCH 5.6 037/118] selftests: net: tcp_mmap: clear whole tcp_zerocopy_receive struct Date: Wed, 13 May 2020 11:44:16 +0200 Message-Id: <20200513094420.665827553@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200513094417.618129545@linuxfoundation.org> References: <20200513094417.618129545@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: Eric Dumazet [ Upstream commit bf5525f3a8e3248be5aa5defe5aaadd60e1c1ba1 ] We added fields in tcp_zerocopy_receive structure, so make sure to clear all fields to not pass garbage to the kernel. We were lucky because recent additions added 'out' parameters, still we need to clean our reference implementation, before folks copy/paste it. Fixes: c8856c051454 ("tcp-zerocopy: Return inq along with tcp receive zerocopy.") Fixes: 33946518d493 ("tcp-zerocopy: Return sk_err (if set) along with tcp receive zerocopy.") Signed-off-by: Eric Dumazet Cc: Arjun Roy Cc: Soheil Hassas Yeganeh Acked-by: Soheil Hassas Yeganeh Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- tools/testing/selftests/net/tcp_mmap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/tools/testing/selftests/net/tcp_mmap.c +++ b/tools/testing/selftests/net/tcp_mmap.c @@ -165,9 +165,10 @@ void *child_thread(void *arg) socklen_t zc_len = sizeof(zc); int res; + memset(&zc, 0, sizeof(zc)); zc.address = (__u64)((unsigned long)addr); zc.length = chunk_size; - zc.recv_skip_hint = 0; + res = getsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE, &zc, &zc_len); if (res == -1)