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=-10.0 required=3.0 tests=BAYES_00,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=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 2BF24C433E1 for ; Thu, 30 Jul 2020 08:14:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2B9F2075F for ; Thu, 30 Jul 2020 08:14:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596096879; bh=fl1fBfq7VAkarh5dDzIyCKF13FawR1zCt5nl5UY5jD0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JcdsEc6CYKgSIXteLq8n4+IHIRP++Xotkd3wUdGXT4NpzCKnSNeN3LOtBiS82T7rB 1UwM96deW/uYbIFB3t5/MtUBLPSZ0YtYkfn5VehnsW4rbVA8UG5ZdnMtcK2oUjP5Fw aXpvJe74wi+OE0IbO0K4Oe+eImLJ+DiFwei5NhRc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729425AbgG3IM1 (ORCPT ); Thu, 30 Jul 2020 04:12:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:51680 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730036AbgG3IM0 (ORCPT ); Thu, 30 Jul 2020 04:12:26 -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 2BE502074B; Thu, 30 Jul 2020 08:12:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596096744; bh=fl1fBfq7VAkarh5dDzIyCKF13FawR1zCt5nl5UY5jD0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U+fsnW1p2QT1S8pueDRGXcq3n0vyx8+oVLvacSI8monWqJTE/KsmzYgBOl9rOcRiQ PUYIrzFNQgsfQmhHmeHXyowyRGsh8esOxMni7qW49/VfFxQ3Lnn8fZaoavJd/7n3Fn Y1ac5vNBP29IxAV3sQUz54aJJYIri2e3HoWxQwkE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Howells , "David S. Miller" Subject: [PATCH 4.4 44/54] rxrpc: Fix sendmsg() returning EPIPE due to recvmsg() returning ENODATA Date: Thu, 30 Jul 2020 10:05:23 +0200 Message-Id: <20200730074423.320388565@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200730074421.203879987@linuxfoundation.org> References: <20200730074421.203879987@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Howells [ Upstream commit 639f181f0ee20d3249dbc55f740f0167267180f0 ] rxrpc_sendmsg() returns EPIPE if there's an outstanding error, such as if rxrpc_recvmsg() indicating ENODATA if there's nothing for it to read. Change rxrpc_recvmsg() to return EAGAIN instead if there's nothing to read as this particular error doesn't get stored in ->sk_err by the networking core. Also change rxrpc_sendmsg() so that it doesn't fail with delayed receive errors (there's no way for it to report which call, if any, the error was caused by). Fixes: 17926a79320a ("[AF_RXRPC]: Provide secure RxRPC sockets for use by userspace and kernel both") Signed-off-by: David Howells Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/rxrpc/ar-output.c | 2 +- net/rxrpc/ar-recvmsg.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/net/rxrpc/ar-output.c +++ b/net/rxrpc/ar-output.c @@ -533,7 +533,7 @@ static int rxrpc_send_data(struct rxrpc_ /* this should be in poll */ sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); - if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN)) + if (sk->sk_shutdown & SEND_SHUTDOWN) return -EPIPE; more = msg->msg_flags & MSG_MORE; --- a/net/rxrpc/ar-recvmsg.c +++ b/net/rxrpc/ar-recvmsg.c @@ -78,7 +78,7 @@ int rxrpc_recvmsg(struct socket *sock, s release_sock(&rx->sk); if (continue_call) rxrpc_put_call(continue_call); - return -ENODATA; + return -EAGAIN; } }