kernel_optimize_test/drivers/iio/health
Jonathan Cameron f88ecccac4 iio:health:afe4404 Fix timestamp alignment and prevent data leak.
One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses a 40 byte array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by
moving to a suitable structure in the iio_priv() data with alignment
explicitly requested.  This data is allocated with kzalloc so no
data can leak appart from previous readings.

Fixes: 87aec56e27 ("iio: health: Add driver for the TI AFE4404 heart monitor")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-14 12:32:22 +01:00
..
afe440x.h
afe4403.c iio:health:afe4403 Fix timestamp alignment and prevent data leak. 2020-06-14 12:32:22 +01:00
afe4404.c iio:health:afe4404 Fix timestamp alignment and prevent data leak. 2020-06-14 12:32:22 +01:00
Kconfig
Makefile
max30100.c iio: health: max30100: use generic property handler 2020-04-19 16:56:13 +01:00
max30102.c