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| author | Stefan Windfeldt-Prytz <stefan.windfeldt@axis.com> | 2018-02-15 17:02:53 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2018-02-17 19:54:58 +0300 |
| commit | 4cd140bda6494543f1c1b0ccceceaa44b676eef6 (patch) | |
| tree | 4b97fb5a8a0ba74b829bfcab703716d1ad07868e /drivers/iio/industrialio-buffer.c | |
| parent | f027e0b3a774e10302207e91d304bbf99e3a8b36 (diff) | |
| download | linux-4cd140bda6494543f1c1b0ccceceaa44b676eef6.tar.xz | |
iio: buffer: check if a buffer has been set up when poll is called
If no iio buffer has been set up and poll is called return 0.
Without this check there will be a null pointer dereference when
calling poll on a iio driver without an iio buffer.
Cc: stable@vger.kernel.org
Signed-off-by: Stefan Windfeldt-Prytz <stefan.windfeldt@axis.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/industrialio-buffer.c')
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index eda2a0f1658f..c7499c8bd69f 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -175,7 +175,7 @@ unsigned int iio_buffer_poll(struct file *filp, struct iio_dev *indio_dev = filp->private_data; struct iio_buffer *rb = indio_dev->buffer; - if (!indio_dev->info) + if (!indio_dev->info || rb == NULL) return 0; poll_wait(filp, &rb->pollq, wait); |