Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-01 00:21:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

iio: buffer: check if a buffer has been set up when poll is called

Browse Source 
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>
This commit is contained in:
Stefan Windfeldt-Prytz 2018-02-15 15:02:53 +01:00 committed by Jonathan Cameron
parent f027e0b3a7
commit 4cd140bda6
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/iio/industrialio-buffer.c
View File

@ -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);