diff options
| -rw-r--r-- | drivers/uio/uio.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 10a029b2415..d2efe823c20 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -381,7 +381,13 @@ static int uio_get_minor(struct uio_device *idev) retval = -ENOMEM; goto exit; } - idev->minor = id & MAX_ID_MASK; + if (id < UIO_MAX_DEVICES) { + idev->minor = id; + } else { + dev_err(idev->dev, "too many uio devices\n"); + retval = -EINVAL; + idr_remove(&uio_idr, id); + } exit: mutex_unlock(&minor_lock); return retval; |