On Thu, Mar 30, 2017 at 07:48:24PM +0100, Al Viro wrote: > BTW, ..._inatomic is a very unfortunate name, IMO - it's *not* safe > to use in atomic contexts as-is, to start with; the caller needs to take > care of pagefault_disable(). If anything, __copy_from_user_nofault() would > probably be better...
Not even that - again, it will happily trigger page faults unless the caller disables those. __copy_from_user_I_know_what_I_am_doing()?
