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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DC4EC7EE23 for ; Sun, 26 Feb 2023 14:52:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230270AbjBZOwH (ORCPT ); Sun, 26 Feb 2023 09:52:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44690 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230241AbjBZOvS (ORCPT ); Sun, 26 Feb 2023 09:51:18 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8FCCA18B2E; Sun, 26 Feb 2023 06:48:59 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 34F0860C4E; Sun, 26 Feb 2023 14:46:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 41DB7C433A4; Sun, 26 Feb 2023 14:46:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1677422797; bh=rfPx/rZIzHLNj3p2KtOMPVy1khbRbqvymM0pSmhRwi0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q2N/aqowUCJckmlZiv7JskN0aPk+JKNkXB1hTZZFqH4Nsp3Yhh6mtAQGpb1KkTpMk NPV6WOO59xCulaIX3KEgk/MSOMOhFDfJ6ptwYD9nJesjGix46cf47Y61r/MRuVS3FL DCveBLs65bexdHC1QTfh0seXDxulY6tMstHsa3giJcwUuuJiuJJP1EYm/GwjUf5pnQ C8DjnY6iQBz3hSZsrkbGzUR085mXhlMbkxnXRRljzhMIKl9L/fEGBTy7DSNy8ifBui ERWOaH6J1iCwUdQ2mCgPh6y5kEZX2fM6F09+LhZXjPtw2j1pUm2Hdzzjo1Ulol+gjO eHbnTXqZPjZsw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Michael Kelley , Haiyang Zhang , Paolo Abeni , Sasha Levin , kys@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 6.2 49/53] hv_netvsc: Check status in SEND_RNDIS_PKT completion message Date: Sun, 26 Feb 2023 09:44:41 -0500 Message-Id: <20230226144446.824580-49-sashal@kernel.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230226144446.824580-1-sashal@kernel.org> References: <20230226144446.824580-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Michael Kelley [ Upstream commit dca5161f9bd052e9e73be90716ffd57e8762c697 ] Completion responses to SEND_RNDIS_PKT messages are currently processed regardless of the status in the response, so that resources associated with the request are freed. While this is appropriate, code bugs that cause sending a malformed message, or errors on the Hyper-V host, go undetected. Fix this by checking the status and outputting a rate-limited message if there is an error. Signed-off-by: Michael Kelley Reviewed-by: Haiyang Zhang Link: https://lore.kernel.org/r/1676264881-48928-1-git-send-email-mikelley@microsoft.com Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/hyperv/netvsc.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 79f4e13620a46..da737d959e81c 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -851,6 +851,7 @@ static void netvsc_send_completion(struct net_device *ndev, u32 msglen = hv_pkt_datalen(desc); struct nvsp_message *pkt_rqst; u64 cmd_rqst; + u32 status; /* First check if this is a VMBUS completion without data payload */ if (!msglen) { @@ -922,6 +923,23 @@ static void netvsc_send_completion(struct net_device *ndev, break; case NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE: + if (msglen < sizeof(struct nvsp_message_header) + + sizeof(struct nvsp_1_message_send_rndis_packet_complete)) { + if (net_ratelimit()) + netdev_err(ndev, "nvsp_rndis_pkt_complete length too small: %u\n", + msglen); + return; + } + + /* If status indicates an error, output a message so we know + * there's a problem. But process the completion anyway so the + * resources are released. + */ + status = nvsp_packet->msg.v1_msg.send_rndis_pkt_complete.status; + if (status != NVSP_STAT_SUCCESS && net_ratelimit()) + netdev_err(ndev, "nvsp_rndis_pkt_complete error status: %x\n", + status); + netvsc_send_tx_complete(ndev, net_device, incoming_channel, desc, budget); break; -- 2.39.0