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Date:   Wed, 4 Nov 2020 13:43:48 -0800
From:   Jakub Kicinski <kuba@kernel.org>
To:     "Andrea Parri (Microsoft)" <parri.andrea@gmail.com>
Cc:     linux-kernel@vger.kernel.org,
        "K . Y . Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Wei Liu <wei.liu@kernel.org>, linux-hyperv@vger.kernel.org,
        Andres Beltran <lkmlabelt@gmail.com>,
        Michael Kelley <mikelley@microsoft.com>,
        Saruhan Karademir <skarade@microsoft.com>,
        Juan Vazquez <juvazq@microsoft.com>,
        "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org
Subject: Re: [PATCH v8 3/3] hv_netvsc: Use vmbus_requestor to generate
 transaction IDs for VMBus hardening
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In-Reply-To: <20201104154027.319432-4-parri.andrea@gmail.com>
References: <20201104154027.319432-1-parri.andrea@gmail.com>
        <20201104154027.319432-4-parri.andrea@gmail.com>
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On Wed,  4 Nov 2020 16:40:27 +0100 Andrea Parri (Microsoft) wrote:
> From: Andres Beltran <lkmlabelt@gmail.com>
> 
> Currently, pointers to guest memory are passed to Hyper-V as
> transaction IDs in netvsc. In the face of errors or malicious
> behavior in Hyper-V, netvsc should not expose or trust the transaction
> IDs returned by Hyper-V to be valid guest memory addresses. Instead,
> use small integers generated by vmbus_requestor as requests
> (transaction) IDs.
> 
> Signed-off-by: Andres Beltran <lkmlabelt@gmail.com>
> Co-developed-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
> Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
> Reviewed-by: Michael Kelley <mikelley@microsoft.com>

I'm assuming this is targeting net-next? If so could you please tag it
as [PATCH net-next vN]?

> @@ -695,10 +695,19 @@ static void netvsc_send_tx_complete(struct net_device *ndev,
>  				    const struct vmpacket_descriptor *desc,
>  				    int budget)
>  {
> -	struct sk_buff *skb = (struct sk_buff *)(unsigned long)desc->trans_id;
> +	struct sk_buff *skb;
>  	struct net_device_context *ndev_ctx = netdev_priv(ndev);

Swap these two lines please to keep the variables declaration lines
longest to shortest.