Hi, Regarding the user memory access, here is my suggestion which should minimize the changes:
- Keep __put_user() and __get_user() as you did. - Remove put_user(), get_user(), copy_from_user() and copy_to_user() - Modify the signal.c code so that it uses __put_user, __get_user and lock/unlock_user. - Modify lock_user() so that it automatically does access_ok() and returns NULL if access_ok() fails. - Test lock_user/lock_user_struct/... return value explicitely at every call. - Fix page_check_range() so that it handles writes to pages containing code by calling page_unprotect when necessary (the current code can fail in this case !). - Suppress no longer needed page_unprotect_range() call in syscall.c. - Suppress or fix tput/tget macros so that they do access_ok(). Regards, Fabrice.
