Question regarding User Space and the Kernel

["Sikandar Khan" <sikandar032@xxxxxxxxx>]

Hi all,

 

I have a small doubt.

 

1) Can the kernel access User Address Space. If yes thats wat i found from net ( but it is poorly written driver if it allows the same)

then why cant the kernel directly copy data from the user . Why do we need copy_to_user and copy_from_user.

Is it because some  protection  mechanisms.

 

-Sikandar.