diff options
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index a68bce4d0ddb..183a5b07c3ad 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1060,6 +1060,12 @@ void vmbus_on_msg_dpc(unsigned long data) goto msg_handled; } + if (msg->header.payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) { + WARN_ONCE(1, "payload size is too large (%d)\n", + msg->header.payload_size); + goto msg_handled; + } + entry = &channel_message_table[hdr->msgtype]; if (!entry->message_handler) @@ -1071,7 +1077,8 @@ void vmbus_on_msg_dpc(unsigned long data) return; INIT_WORK(&ctx->work, vmbus_onmessage_work); - memcpy(&ctx->msg, msg, sizeof(*msg)); + memcpy(&ctx->msg, msg, sizeof(msg->header) + + msg->header.payload_size); /* * The host can generate a rescind message while we |