From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9E83BA48 for ; Tue, 7 Mar 2023 18:28:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15FE1C433A1; Tue, 7 Mar 2023 18:28:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678213692; bh=0UrN5Ya4jNeVaBqvPSKD6LjakYrw8VQiuRe0x97UxME=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X9R+7CNj5sn5T21//MwJ8funO3DXaWTJ2RTEbtTMRmQQcoaWJeKqkBZLWtgKBe3uo IrdR9p+T3aUXu962g321x36xI9Xt4qeIurbUz10fMaVr3yZIw0B1GkPNbGxhpmUOkk LkHU1gP4iSta1TxhMbsjLFk2Dm/Y/4u3aU5deWCk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Michael Kelley , Haiyang Zhang , Paolo Abeni , Sasha Levin Subject: [PATCH 6.1 588/885] hv_netvsc: Check status in SEND_RNDIS_PKT completion message Date: Tue, 7 Mar 2023 17:58:42 +0100 Message-Id: <20230307170027.933276710@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307170001.594919529@linuxfoundation.org> References: <20230307170001.594919529@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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; -- 2.39.2