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,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 57CEEC433DF for ; Thu, 30 Jul 2020 08:04:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 320452074B for ; Thu, 30 Jul 2020 08:04:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596096291; bh=J0aiOgOPd7YyHG270Ucn4MF+tgtyqZRPTCZ+qXdcNc4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mRD9g2q7ZfWESPqc7wzfQXXIJ23T6EGd5mVxB/+vR776+TB4T8cuWuOznofYvYT0z T2nEftbAOmVnOi4cT3vCBeLzHkO/4NwQ0lIPm0TKdWqKB93h9h53iy9dja8w0ml7WY SwE5xBslmG+WPRVsAM7BxQURlOr3FDXCAKarWFec= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729054AbgG3IEt (ORCPT ); Thu, 30 Jul 2020 04:04:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:41572 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728758AbgG3IEp (ORCPT ); Thu, 30 Jul 2020 04:04:45 -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 5424220672; Thu, 30 Jul 2020 08:04:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596096284; bh=J0aiOgOPd7YyHG270Ucn4MF+tgtyqZRPTCZ+qXdcNc4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jxv+bdAcMAuEMMnfTmTarYiEDeho4dTFbz/NxpK+PGWRoGtLuOys2ozE9T7oH8O/W xoggPX9c0IThyvqS2M0KjMfWZgQneycwi9pd0OaxNLQ+3xE94lQyBA2TWunxrcXg7E jmxOSlpvmi37kUfmShnAvnHq+Q+1j3Cvox3tfwCQ= 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 5.7 11/20] rxrpc: Fix sendmsg() returning EPIPE due to recvmsg() returning ENODATA Date: Thu, 30 Jul 2020 10:04:01 +0200 Message-Id: <20200730074421.071850083@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200730074420.533211699@linuxfoundation.org> References: <20200730074420.533211699@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: 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/recvmsg.c | 2 +- net/rxrpc/sendmsg.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/net/rxrpc/recvmsg.c +++ b/net/rxrpc/recvmsg.c @@ -464,7 +464,7 @@ try_again: list_empty(&rx->recvmsg_q) && rx->sk.sk_state != RXRPC_SERVER_LISTENING) { release_sock(&rx->sk); - return -ENODATA; + return -EAGAIN; } if (list_empty(&rx->recvmsg_q)) { --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -306,7 +306,7 @@ 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;