[Qemu-devel] [PATCH] virtio-net: broken RX filtering logic fixed

[Dmitry Fleytman]

From: Dmitry Fleytman <dfley...@redhat.com>

Upon processing of VIRTIO_NET_CTRL_MAC_TABLE_SET command
multicast list overwrites unicast list in mac_table.
This leads to broken logic for both unicast and multicast RX filtering.

Signed-off-by: Dmitry Fleytman <dfley...@redhat.com>
---
 hw/net/virtio-net.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index dd41008..e822ab1 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -656,7 +656,8 @@ static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
     }
 
     if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
-        s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs,
+        s = iov_to_buf(iov, iov_cnt, 0,
+                       &n->mac_table.macs[n->mac_table.in_use * ETH_ALEN],
                        mac_data.entries * ETH_ALEN);
         if (s != mac_data.entries * ETH_ALEN) {
             goto error;
-- 
1.8.3.1