[PATCH 0/3] vvfat: Fix bugs in writing and reading files

[Amjad Alsharafi]

These patches fix some bugs found when modifying files in vvfat.

First, there was a bug when writing to the second+ cluster of a file, it
will copy the cluster before it instead.

Another issue was modifying the clusters of a file and adding new
clusters, this showed 2 issues:
- If the new cluster is not immediately after the last cluster, it will
  cause issues when reading from this file in the future.
- Generally, the usage of info.file.offset was incorrect, and the
  system would crash on abort() when the file is modified and a new
  cluster was added.