On Fri, Jul 29, 2016 at 10:50 AM, Dave Hansen <[email protected]> wrote: > On 07/29/2016 10:29 AM, Andy Lutomirski wrote: >>> > In the end, this ensures that threads which do not know how to >>> > manage their own pkey rights can not do damage to data which is >>> > pkey-protected. >> I think you missed the fpu__clear() caller in kernel/fpu/signal.c. >> >> ISTM it might be more comprehensible to change fpu__clear in general >> and then special case things you want to behave differently. > > The code actually already patched the generic fpu__clear(): > > fpu__clear() -> > copy_init_fpstate_to_fpregs() -> > copy_init_pkru_to_fpregs() > > So I think it hit the case you are talking about.
Whoops, missed that. -- Andy Lutomirski AMA Capital Management, LLC
