On 11/09/2017 04:53 PM, Andy Lutomirski wrote: >> The KAISER code attempts to "poison" the user portion of the kernel page >> tables. It detects the entries pages that it wants that it wants to >> poison in two ways: >> * Looking for addresses >= PAGE_OFFSET >> * Looking for entries without _PAGE_USER set > What do you mean "poison"? I meant the _PAGE_NX magic that we do in here: https://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-kaiser.git/commit/?h=kaiser-414rc7-20171108&id=c4f7d0819170761f092fcf2327b85b082368e73a to ensure that userspace is unable to run on the kernel PGD. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
