[ros-kernel] Registry issues

[Jason Filby]

One comment: will you be filing this bug in our Bugzilla
installation? :)

--- Eric Kohl <ekohl at rz-online.de> wrote:
> Hi everyone!
> 
> I got a bug report about a corrupted registry a few days ago. I
> analyzed the
> included system hive and found out that a hive file can be damaged
> in
> _very_rare_ cases. That's why I did not report it as a showstopper.
> The main
> cause of the bug is that a key-cell is modified when a subkey is
> added but
> the key-cell's block is not marked dirty if the all the other
> involved
> structures are located in other blocks. This causes a
> dangling-pointer bug
> if the subkey-list-cell (aka hash-cell) grows and moves to a new
> location.
> 
> One major weakness of the NT4-compatible implementation is that two
> structures, value list cells and value data cells, do not have an
> id or
> magic value to verify their identity. My plan is to add the missing
> id
> values and implement a test upon load/import in order to verify the
> integrity of the hive.
> 
> Any comments?
> 
> 
> Eric
> 
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