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=-10.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 642FFC43387 for ; Fri, 11 Jan 2019 15:11:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 331FD20874 for ; Fri, 11 Jan 2019 15:11:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547219472; bh=d4iQL5w7fjhIBI4fBstXh5noOcdITY7486dFvbpVVLg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EU4B2/RmJY7rlx7cCWJs4Ehiby+1GJbA5EoTZitrEZ7XarWBKQ1rtKzXo6OT9zK9h qMyhOXpitqmevfQyTKqVx5jz4LbILYNbU/eq4QNTLduH1Lm0zaz9+vhdpAZcJEEQRS BDqmlLjU6oGfB8U5AXVzEXvOqzruZITHl+ne9q8c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387621AbfAKOQV (ORCPT ); Fri, 11 Jan 2019 09:16:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:60702 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387589AbfAKOQT (ORCPT ); Fri, 11 Jan 2019 09:16:19 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 025FE214D8; Fri, 11 Jan 2019 14:16:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547216178; bh=d4iQL5w7fjhIBI4fBstXh5noOcdITY7486dFvbpVVLg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F4AvLmOQnpX2yrDOiYHyOpZlS9GJnVU5C3r9N1E3h/m4h8uauH5MXjut7oKfrIwUR s0QXUJDTDT/7sq52GRUo7w/qlqELuI63RPMcrFafimIs5XASgshR40KoCC3RGPGLG7 ZDu/znS2rSPf/Povw9gYto/O9FUypK+nHFI4so5M= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Adit Ranadive , Vishnu Dasa , Jorgen Hansen , "David S. Miller" Subject: [PATCH 3.18 17/47] VSOCK: Send reset control packet when socket is partially bound Date: Fri, 11 Jan 2019 15:08:02 +0100 Message-Id: <20190111130958.194121911@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190111130956.170952125@linuxfoundation.org> References: <20190111130956.170952125@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jorgen Hansen [ Upstream commit a915b982d8f5e4295f64b8dd37ce753874867e88 ] If a server side socket is bound to an address, but not in the listening state yet, incoming connection requests should receive a reset control packet in response. However, the function used to send the reset silently drops the reset packet if the sending socket isn't bound to a remote address (as is the case for a bound socket not yet in the listening state). This change fixes this by using the src of the incoming packet as destination for the reset packet in this case. Fixes: d021c344051a ("VSOCK: Introduce VM Sockets") Reviewed-by: Adit Ranadive Reviewed-by: Vishnu Dasa Signed-off-by: Jorgen Hansen Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/vmw_vsock/vmci_transport.c | 67 ++++++++++++++++++++++++++++++----------- 1 file changed, 50 insertions(+), 17 deletions(-) --- a/net/vmw_vsock/vmci_transport.c +++ b/net/vmw_vsock/vmci_transport.c @@ -273,6 +273,31 @@ vmci_transport_send_control_pkt_bh(struc } static int +vmci_transport_alloc_send_control_pkt(struct sockaddr_vm *src, + struct sockaddr_vm *dst, + enum vmci_transport_packet_type type, + u64 size, + u64 mode, + struct vmci_transport_waiting_info *wait, + u16 proto, + struct vmci_handle handle) +{ + struct vmci_transport_packet *pkt; + int err; + + pkt = kmalloc(sizeof(*pkt), GFP_KERNEL); + if (!pkt) + return -ENOMEM; + + err = __vmci_transport_send_control_pkt(pkt, src, dst, type, size, + mode, wait, proto, handle, + true); + kfree(pkt); + + return err; +} + +static int vmci_transport_send_control_pkt(struct sock *sk, enum vmci_transport_packet_type type, u64 size, @@ -281,9 +306,7 @@ vmci_transport_send_control_pkt(struct s u16 proto, struct vmci_handle handle) { - struct vmci_transport_packet *pkt; struct vsock_sock *vsk; - int err; vsk = vsock_sk(sk); @@ -293,17 +316,10 @@ vmci_transport_send_control_pkt(struct s if (!vsock_addr_bound(&vsk->remote_addr)) return -EINVAL; - pkt = kmalloc(sizeof(*pkt), GFP_KERNEL); - if (!pkt) - return -ENOMEM; - - err = __vmci_transport_send_control_pkt(pkt, &vsk->local_addr, - &vsk->remote_addr, type, size, - mode, wait, proto, handle, - true); - kfree(pkt); - - return err; + return vmci_transport_alloc_send_control_pkt(&vsk->local_addr, + &vsk->remote_addr, + type, size, mode, + wait, proto, handle); } static int vmci_transport_send_reset_bh(struct sockaddr_vm *dst, @@ -321,12 +337,29 @@ static int vmci_transport_send_reset_bh( static int vmci_transport_send_reset(struct sock *sk, struct vmci_transport_packet *pkt) { + struct sockaddr_vm *dst_ptr; + struct sockaddr_vm dst; + struct vsock_sock *vsk; + if (pkt->type == VMCI_TRANSPORT_PACKET_TYPE_RST) return 0; - return vmci_transport_send_control_pkt(sk, - VMCI_TRANSPORT_PACKET_TYPE_RST, - 0, 0, NULL, VSOCK_PROTO_INVALID, - VMCI_INVALID_HANDLE); + + vsk = vsock_sk(sk); + + if (!vsock_addr_bound(&vsk->local_addr)) + return -EINVAL; + + if (vsock_addr_bound(&vsk->remote_addr)) { + dst_ptr = &vsk->remote_addr; + } else { + vsock_addr_init(&dst, pkt->dg.src.context, + pkt->src_port); + dst_ptr = &dst; + } + return vmci_transport_alloc_send_control_pkt(&vsk->local_addr, dst_ptr, + VMCI_TRANSPORT_PACKET_TYPE_RST, + 0, 0, NULL, VSOCK_PROTO_INVALID, + VMCI_INVALID_HANDLE); } static int vmci_transport_send_negotiate(struct sock *sk, size_t size)