Commit 3a67c9cc authored by KY Srinivasan's avatar KY Srinivasan Committed by David S. Miller

hyperv: Fix a bug in netvsc_send()

After the packet is successfully sent, we should not touch the packet
as it may have been freed. This patch is based on the work done by
Long Li <longli@microsoft.com>.

David, please queue this up for stable.
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reported-by: default avatarSitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 47549650
......@@ -705,6 +705,7 @@ int netvsc_send(struct hv_device *device,
unsigned int section_index = NETVSC_INVALID_INDEX;
u32 msg_size = 0;
struct sk_buff *skb;
u16 q_idx = packet->q_idx;
net_device = get_outbound_net_device(device);
......@@ -769,24 +770,24 @@ int netvsc_send(struct hv_device *device,
if (ret == 0) {
atomic_inc(&net_device->num_outstanding_sends);
atomic_inc(&net_device->queue_sends[packet->q_idx]);
atomic_inc(&net_device->queue_sends[q_idx]);
if (hv_ringbuf_avail_percent(&out_channel->outbound) <
RING_AVAIL_PERCENT_LOWATER) {
netif_tx_stop_queue(netdev_get_tx_queue(
ndev, packet->q_idx));
ndev, q_idx));
if (atomic_read(&net_device->
queue_sends[packet->q_idx]) < 1)
queue_sends[q_idx]) < 1)
netif_tx_wake_queue(netdev_get_tx_queue(
ndev, packet->q_idx));
ndev, q_idx));
}
} else if (ret == -EAGAIN) {
netif_tx_stop_queue(netdev_get_tx_queue(
ndev, packet->q_idx));
if (atomic_read(&net_device->queue_sends[packet->q_idx]) < 1) {
ndev, q_idx));
if (atomic_read(&net_device->queue_sends[q_idx]) < 1) {
netif_tx_wake_queue(netdev_get_tx_queue(
ndev, packet->q_idx));
ndev, q_idx));
ret = -ENOSPC;
}
} else {
......
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