Messages in this thread Patch in this message | | | Date | Thu, 30 Sep 2021 11:05:23 -0700 | Subject | [PATCH v4 07/15] lkdtm: Disable UNSET_SMEP with CFI | From | Sami Tolvanen <> |
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Disable the UNSET_SMEP test when CONFIG_CFI_CLANG is enabled as jumping to a call gadget would always trip CFI instead.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Acked-by: Kees Cook <keescook@chromium.org> --- drivers/misc/lkdtm/bugs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/lkdtm/bugs.c b/drivers/misc/lkdtm/bugs.c index 4282b625200f..6e8677852262 100644 --- a/drivers/misc/lkdtm/bugs.c +++ b/drivers/misc/lkdtm/bugs.c @@ -367,7 +367,7 @@ void lkdtm_STACK_GUARD_PAGE_TRAILING(void) void lkdtm_UNSET_SMEP(void) { -#if IS_ENABLED(CONFIG_X86_64) && !IS_ENABLED(CONFIG_UML) +#if IS_ENABLED(CONFIG_X86_64) && !IS_ENABLED(CONFIG_UML) && !IS_ENABLED(CONFIG_CFI_CLANG) #define MOV_CR4_DEPTH 64 void (*direct_write_cr4)(unsigned long val); unsigned char *insn; -- 2.33.0.800.g4c38ced690-goog
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