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| author | Michael Kelley <mikelley@microsoft.com> | 2023-02-13 08:08:01 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-02-14 15:56:56 +0300 |
| commit | dca5161f9bd052e9e73be90716ffd57e8762c697 (patch) | |
| tree | 448b7aba3dbe561bec1bf55469911a187818146c | |
| parent | 991cbd4f34b1d2d4e4cc41aed6eb4799186c3887 (diff) | |
| download | linux-dca5161f9bd052e9e73be90716ffd57e8762c697.tar.xz | |
hv_netvsc: Check status in SEND_RNDIS_PKT completion message
Completion responses to SEND_RNDIS_PKT messages are currently processed
regardless of the status in the response, so that resources associated
with the request are freed. While this is appropriate, code bugs that
cause sending a malformed message, or errors on the Hyper-V host, go
undetected. Fix this by checking the status and outputting a rate-limited
message if there is an error.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Link: https://lore.kernel.org/r/1676264881-48928-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| -rw-r--r-- | drivers/net/hyperv/netvsc.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 79f4e13620a4..da737d959e81 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -851,6 +851,7 @@ static void netvsc_send_completion(struct net_device *ndev, u32 msglen = hv_pkt_datalen(desc); struct nvsp_message *pkt_rqst; u64 cmd_rqst; + u32 status; /* First check if this is a VMBUS completion without data payload */ if (!msglen) { @@ -922,6 +923,23 @@ static void netvsc_send_completion(struct net_device *ndev, break; case NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE: + if (msglen < sizeof(struct nvsp_message_header) + + sizeof(struct nvsp_1_message_send_rndis_packet_complete)) { + if (net_ratelimit()) + netdev_err(ndev, "nvsp_rndis_pkt_complete length too small: %u\n", + msglen); + return; + } + + /* If status indicates an error, output a message so we know + * there's a problem. But process the completion anyway so the + * resources are released. + */ + status = nvsp_packet->msg.v1_msg.send_rndis_pkt_complete.status; + if (status != NVSP_STAT_SUCCESS && net_ratelimit()) + netdev_err(ndev, "nvsp_rndis_pkt_complete error status: %x\n", + status); + netvsc_send_tx_complete(ndev, net_device, incoming_channel, desc, budget); break; |