diff options
| -rw-r--r-- | Documentation/driver-api/usb/error-codes.rst | 3 | ||||
| -rw-r--r-- | drivers/usb/core/urb.c | 6 |
2 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/driver-api/usb/error-codes.rst b/Documentation/driver-api/usb/error-codes.rst index a3e84bfac776..8f9790c2d6f8 100644 --- a/Documentation/driver-api/usb/error-codes.rst +++ b/Documentation/driver-api/usb/error-codes.rst @@ -61,6 +61,9 @@ USB-specific: (c) requested data transfer length is invalid: negative or too large for the host controller. +``-EBADR`` The wLength value in a control URB's setup packet does + not match the URB's transfer_buffer_length. + ``-ENOSPC`` This request would overcommit the usb bandwidth reserved for periodic transfers (interrupt, isochronous). diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index 279b3921ff8f..30727729a44c 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -410,6 +410,12 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) dev_WARN_ONCE(&dev->dev, (usb_pipeout(urb->pipe) != is_out), "BOGUS control dir, pipe %x doesn't match bRequestType %x\n", urb->pipe, setup->bRequestType); + if (le16_to_cpu(setup->wLength) != urb->transfer_buffer_length) { + dev_dbg(&dev->dev, "BOGUS control len %d doesn't match transfer length %d\n", + le16_to_cpu(setup->wLength), + urb->transfer_buffer_length); + return -EBADR; + } } else { is_out = usb_endpoint_dir_out(&ep->desc); } |