diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-10-04 12:06:00 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-12 12:04:17 +0100 |
| commit | f18e7a068a0a31250cdb251810f8f6224931c3f5 (patch) | |
| tree | 9692a94465954c615370dec9cd82baeb4387a211 /drivers/iio/industrialio-core.c | |
| parent | 9e69c935fad9fd5f0550c51e3bd251cd30033136 (diff) | |
iio: Return -ENODEV for file operations if the device has been unregistered
If the IIO device has been unregistered return -ENODEV for any further file
operations like read() and ioctl(). This avoids userspace being able to grab new
references to the device.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/industrialio-core.c')
| -rw-r--r-- | drivers/iio/industrialio-core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index f939bad31ca..a019a7b424c 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -1040,6 +1040,9 @@ static long iio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) int __user *ip = (int __user *)arg; int fd; + if (!indio_dev->info) + return -ENODEV; + if (cmd == IIO_GET_EVENT_FD_IOCTL) { fd = iio_event_getfd(indio_dev); if (copy_to_user(ip, &fd, sizeof(fd))) |