Hi all, I have talked with Juerg about picking up the torch for XPFO [1], and have been playing around with the set for a bit. I've fixed one memory corruption issue since v3, and also tried and failed at integrating hugepages support. The code in patch 3 seems to split up the page and apply the right protections, but somehow the lkdtm test read succeeds and no fault is generated, and I don't understand why. [1]: https://lkml.org/lkml/2016/11/4/245 Thoughts welcome, Tycho Juerg Haefliger (2): mm, x86: Add support for eXclusive Page Frame Ownership (XPFO) lkdtm: Add tests for XPFO Tycho Andersen (1): xpfo: add support for hugepages Documentation/admin-guide/kernel-parameters.txt | 2 + arch/x86/Kconfig | 1 + arch/x86/include/asm/pgtable.h | 22 +++ arch/x86/mm/Makefile | 1 + arch/x86/mm/pageattr.c | 21 +-- arch/x86/mm/xpfo.c | 82 +++++++++ drivers/misc/Makefile | 1 + drivers/misc/lkdtm.h | 3 + drivers/misc/lkdtm_core.c | 1 + drivers/misc/lkdtm_xpfo.c | 105 ++++++++++++ include/linux/highmem.h | 15 +- include/linux/xpfo.h | 38 +++++ mm/Makefile | 1 + mm/page_alloc.c | 2 + mm/page_ext.c | 4 + mm/xpfo.c | 210 ++++++++++++++++++++++++ security/Kconfig | 19 +++ 17 files changed, 508 insertions(+), 20 deletions(-) create mode 100644 arch/x86/mm/xpfo.c create mode 100644 drivers/misc/lkdtm_xpfo.c create mode 100644 include/linux/xpfo.h create mode 100644 mm/xpfo.c -- 2.11.0 -- 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>
