This is a note to let you know that I've just added the patch titled
iio: core: Leave private pointer NULL when no private data supplied
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-core-leave-private-pointer-null-when-no-private-.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 53d08e24206248c2744b3bffb4a359ce95ed3169
Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date: Mon Mar 4 16:04:32 2024 +0200
iio: core: Leave private pointer NULL when no private data supplied
[ Upstream commit f0245ab389330cbc1d187e358a5b890d9f5383db ]
In iio_device_alloc() when size of the private data is 0,
the private pointer is calculated to point behind the valid data.
Leave it NULL when no private data supplied.
Fixes: 6d4ebd565d15 ("iio: core: wrap IIO device into an iio_dev_opaque object")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-by: David Lechner <dlechner@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240304140650.977784-2-andriy.shevchenko@xxxxxxxxxxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 173dc00762a15..cc9f0d41f59b2 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1656,8 +1656,10 @@ struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
return NULL;
indio_dev = &iio_dev_opaque->indio_dev;
- indio_dev->priv = (char *)iio_dev_opaque +
- ALIGN(sizeof(struct iio_dev_opaque), IIO_DMA_MINALIGN);
+
+ if (sizeof_priv)
+ indio_dev->priv = (char *)iio_dev_opaque +
+ ALIGN(sizeof(*iio_dev_opaque), IIO_DMA_MINALIGN);
indio_dev->dev.parent = parent;
indio_dev->dev.type = &iio_device_type;
