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Subject[PATCH 4.14 213/496] hv_netvsc: filter multicast/broadcast
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

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

From: Stephen Hemminger <stephen@networkplumber.org>

[ Upstream commit 009f766ca2383d8788acd65c2c36c51bbfb19470 ]

The netvsc driver was always enabling all multicast and broadcast
even if netdevice flag had not enabled it.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/hyperv/rndis_filter.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)

--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -850,15 +850,19 @@ static void rndis_set_multicast(struct w
{
struct rndis_device *rdev
= container_of(w, struct rndis_device, mcast_work);
+ u32 filter = NDIS_PACKET_TYPE_DIRECTED;
+ unsigned int flags = rdev->ndev->flags;

- if (rdev->ndev->flags & IFF_PROMISC)
- rndis_filter_set_packet_filter(rdev,
- NDIS_PACKET_TYPE_PROMISCUOUS);
- else
- rndis_filter_set_packet_filter(rdev,
- NDIS_PACKET_TYPE_BROADCAST |
- NDIS_PACKET_TYPE_ALL_MULTICAST |
- NDIS_PACKET_TYPE_DIRECTED);
+ if (flags & IFF_PROMISC) {
+ filter = NDIS_PACKET_TYPE_PROMISCUOUS;
+ } else {
+ if (flags & IFF_ALLMULTI)
+ flags |= NDIS_PACKET_TYPE_ALL_MULTICAST;
+ if (flags & IFF_BROADCAST)
+ flags |= NDIS_PACKET_TYPE_BROADCAST;
+ }
+
+ rndis_filter_set_packet_filter(rdev, filter);
}

void rndis_filter_update(struct netvsc_device *nvdev)

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