Christopher Haster eed1eec5fd Fixed information leaks through reused caches ...

As a shortcut, littlefs never bother to zero any of the buffers is used.
It didn't need to because it would always write out the entirety of the
data it needed.

Unfortunately, this, combined with the extra padding used to align
buffers to the nearest prog size, would lead to uninitialized data
getting written out to disk.

This means unrelated file data could be written to different parts of
storage, or worse, information leaked from the malloc calls could be
written out to disk unnecessarily.

found by rojer

2018-07-10 11:18:46 -05:00

67 KiB

Raw Blame History

View Raw