Not logged in
Log in now
Create an account
Subscribe to LWN
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
(Nearly) full tickless operation in 3.10
This new hardware feature will work in x86-64 kernels (as you'd expect).
Supervisor mode access prevention
Posted Oct 4, 2012 8:43 UTC (Thu) by PaXTeam (subscriber, #24616)
i implemented UDEREF on amd64 as well some years ago, but it's a lot less efficient.
> This new hardware feature will work in x86-64 kernels (as you'd expect).
and unfortunately it'll still provide less security than the by then 7-year-old UDEREF/i386 feature in PaX. so SMAP is a step in the right direction, but Intel could have done better, it'd have cost them nothing to make this feature really powerful for certain kernel self-protection purposes. there's some hope that they'll make it better in the next iteration.
Copyright © 2013, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds