98596300e0
[ Upstream commit f88ecccac4be348bbcc6d056bdbc622a8955c04d ]
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:
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|---|---|---|
| .. | ||
| afe440x.h | ||
| afe4403.c | ||
| afe4404.c | ||
| Kconfig | ||
| Makefile | ||
| max30100.c | ||
| max30102.c | ||