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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Haiyang Zhang <haiyangz@microsoft.com>,
        "David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.14 015/165] hv_netvsc: Add initialization of tx_table in netvsc_device_add()
Date:   Thu, 24 May 2018 11:37:01 +0200
Message-Id: <20180524093622.599121718@linuxfoundation.org>
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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Haiyang Zhang <haiyangz@microsoft.com>

[ Commit 6b0cbe315868d613123cf387052ccda5f09d49ea upstream. ]

tx_table is part of the private data of kernel net_device. It is only
zero-ed out when allocating net_device.

We may recreate netvsc_device w/o recreating net_device, so the private
netdev data, including tx_table, are not zeroed. It may contain channel
numbers for the older netvsc_device.

This patch adds initialization of tx_table each time we recreate
netvsc_device.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/hyperv/netvsc.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -1252,6 +1252,9 @@ struct netvsc_device *netvsc_device_add(
 	if (!net_device)
 		return ERR_PTR(-ENOMEM);
 
+	for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
+		net_device_ctx->tx_table[i] = 0;
+
 	net_device->ring_size = ring_size;
 
 	/* Because the device uses NAPI, all the interrupt batching and