This adds CR0 pinning (for WP), and cleans up the CR4 pin to avoid taking an exception from WARN before fixing up the desired pin. Additionally adds lkdtm test (which depends on the CR4 patch, otherwise I'd send it via Greg's tree).
v2: - include brown-paper-bag fix to lkdtm test in v1 - clean up comments Thanks! -Kees Kees Cook (3): x86/asm: Pin sensitive CR0 bits x86/asm: Avoid taking an exception before cr4 restore lkdtm: Check for SMEP clearing protections arch/x86/include/asm/special_insns.h | 37 ++++++++++++++--- drivers/misc/lkdtm/bugs.c | 61 ++++++++++++++++++++++++++++ drivers/misc/lkdtm/core.c | 1 + drivers/misc/lkdtm/lkdtm.h | 1 + 4 files changed, 95 insertions(+), 5 deletions(-) -- 2.17.1
