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| author | Lars-Peter Clausen <lars@metafoo.de> | 2019-02-20 17:11:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-27 09:36:35 +0200 |
| commit | 36971130bb2f815fddae17cfe02ae5fed9b3ff56 (patch) | |
| tree | 34e5aa3076573c11212e6341925ad4c923c8cac5 /drivers/iio | |
| parent | 0e47edde91325efde88e937e1ccc5883c32b5a31 (diff) | |
| download | linux-stable-36971130bb2f815fddae17cfe02ae5fed9b3ff56.tar.gz linux-stable-36971130bb2f815fddae17cfe02ae5fed9b3ff56.tar.bz2 linux-stable-36971130bb2f815fddae17cfe02ae5fed9b3ff56.zip | |
iio: Fix scan mask selection
commit 20ea39ef9f2f911bd01c69519e7d69cfec79fde3 upstream.
The trialmask is expected to have all bits set to 0 after allocation.
Currently kmalloc_array() is used which does not zero the memory and so
random bits are set. This results in random channels being enabled when
they shouldn't. Replace kmalloc_array() with kcalloc() which has the same
interface but zeros the memory.
Note the fix is actually required earlier than the below fixes tag, but
will require a manual backport due to move from kmalloc to kmalloc_array.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Fixes commit 057ac1acdfc4 ("iio: Use kmalloc_array() in iio_scan_mask_set()").
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index cd5bfe39591b..dadd921a4a30 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -320,9 +320,8 @@ static int iio_scan_mask_set(struct iio_dev *indio_dev, const unsigned long *mask; unsigned long *trialmask; - trialmask = kmalloc_array(BITS_TO_LONGS(indio_dev->masklength), - sizeof(*trialmask), - GFP_KERNEL); + trialmask = kcalloc(BITS_TO_LONGS(indio_dev->masklength), + sizeof(*trialmask), GFP_KERNEL); if (trialmask == NULL) return -ENOMEM; if (!indio_dev->masklength) { |