diff options
Diffstat (limited to 'drivers/net/hyperv/netvsc.c')
| -rw-r--r-- | drivers/net/hyperv/netvsc.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 4123d081b1c7..c9910c33e671 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -282,6 +282,8 @@ static int netvsc_init_buf(struct hv_device *device, goto cleanup; } + net_device->recv_buf_size = buf_size; + /* * Establish the gpadl handle for this buffer on this * channel. Note: This call uses the vmbus connection rather @@ -1095,15 +1097,30 @@ static int netvsc_receive(struct net_device *ndev, /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ for (i = 0; i < count; i++) { - void *data = recv_buf - + vmxferpage_packet->ranges[i].byte_offset; + u32 offset = vmxferpage_packet->ranges[i].byte_offset; u32 buflen = vmxferpage_packet->ranges[i].byte_count; + void *data; + int ret; + + if (unlikely(offset + buflen > net_device->recv_buf_size)) { + status = NVSP_STAT_FAIL; + netif_err(net_device_ctx, rx_err, ndev, + "Packet offset:%u + len:%u too big\n", + offset, buflen); + + continue; + } + + data = recv_buf + offset; trace_rndis_recv(ndev, q_idx, data); /* Pass it to the upper layer */ - status = rndis_filter_receive(ndev, net_device, - channel, data, buflen); + ret = rndis_filter_receive(ndev, net_device, + channel, data, buflen); + + if (unlikely(ret != NVSP_STAT_SUCCESS)) + status = NVSP_STAT_FAIL; } enq_receive_complete(ndev, net_device, q_idx, |