On Thu, Oct 15, 2020 at 10:01:52AM -0500, Christopher M. Riedl wrote: > Implement raw_copy_from_user_allowed() which assumes that userspace read > access is open. Use this new function to implement raw_copy_from_user(). > Finally, wrap the new function to follow the usual "unsafe_" convention > of taking a label argument. The new raw_copy_from_user_allowed() calls > __copy_tofrom_user() internally, but this is still safe to call in user > access blocks formed with user_*_access_begin()/user_*_access_end() > since asm functions are not instrumented for tracing.
Please also add a fallback unsafe_copy_from_user to linux/uaccess.h so this can be used as a generic API.
