diff options
| author | Kees Cook <keescook@chromium.org> | 2018-01-03 10:18:01 -0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2018-01-07 01:46:54 +0000 |
| commit | b0b7893b1cde5b0121a7d9a619426a93f3026e27 (patch) | |
| tree | e0eb3adb171a9ff17faa4057e89b4fab1a95d76a | |
| parent | 108ec7a7d73e90db280f14581ccddc6f9c928bff (diff) | |
KPTI: Report when enabled
Make sure dmesg reports when KPTI is enabled.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | arch/x86/mm/kaiser.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/mm/kaiser.c b/arch/x86/mm/kaiser.c index 8565ae286dad..a95acd4c71fa 100644 --- a/arch/x86/mm/kaiser.c +++ b/arch/x86/mm/kaiser.c @@ -13,6 +13,9 @@ #include <linux/ftrace.h> #include <xen/xen.h> +#undef pr_fmt +#define pr_fmt(fmt) "Kernel/User page tables isolation: " fmt + extern struct mm_struct init_mm; #include <asm/kaiser.h> @@ -300,7 +303,7 @@ enable: return; disable: - pr_info("Kernel/User page tables isolation: disabled\n"); + pr_info("disabled\n"); silent_disable: kaiser_enabled = 0; @@ -352,6 +355,8 @@ void __init kaiser_init(void) __PAGE_KERNEL_VVAR); kaiser_add_user_map_early((void *)VSYSCALL_START, PAGE_SIZE, vsyscall_pgprot); + + pr_info("enabled\n"); } /* Add a mapping to the shadow mapping, and synchronize the mappings */ |