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| author | Baoquan He <bhe@redhat.com> | 2016-04-20 13:55:43 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-22 10:00:50 +0200 |
| commit | e8581e3d67788b6b29d055fa42c6cb5b258fee64 (patch) | |
| tree | a8be9eed7cd09d3322b3b237fed09ea3b83dc633 /arch/x86/include/asm/page_64_types.h | |
| parent | 4252db10559fc3d1efc1e43613254fdd220b014b (diff) | |
| download | linux-0-day-e8581e3d67788b6b29d055fa42c6cb5b258fee64.tar.gz linux-0-day-e8581e3d67788b6b29d055fa42c6cb5b258fee64.tar.xz | |
x86/KASLR: Drop CONFIG_RANDOMIZE_BASE_MAX_OFFSET
Currently CONFIG_RANDOMIZE_BASE_MAX_OFFSET is used to limit the maximum
offset for kernel randomization. This limit doesn't need to be a CONFIG
since it is tied completely to KERNEL_IMAGE_SIZE, and will make no sense
once physical and virtual offsets are randomized separately. This patch
removes CONFIG_RANDOMIZE_BASE_MAX_OFFSET and consolidates the Kconfig
help text.
[kees: rewrote changelog, dropped KERNEL_IMAGE_SIZE_DEFAULT, rewrote help]
Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: H.J. Lu <hjl.tools@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1461185746-8017-3-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/page_64_types.h')
| -rw-r--r-- | arch/x86/include/asm/page_64_types.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h index 4928cf0d5af0f..d5c2f8b40faab 100644 --- a/arch/x86/include/asm/page_64_types.h +++ b/arch/x86/include/asm/page_64_types.h @@ -47,12 +47,10 @@ * are fully set up. If kernel ASLR is configured, it can extend the * kernel page table mapping, reducing the size of the modules area. */ -#define KERNEL_IMAGE_SIZE_DEFAULT (512 * 1024 * 1024) -#if defined(CONFIG_RANDOMIZE_BASE) && \ - CONFIG_RANDOMIZE_BASE_MAX_OFFSET > KERNEL_IMAGE_SIZE_DEFAULT -#define KERNEL_IMAGE_SIZE CONFIG_RANDOMIZE_BASE_MAX_OFFSET +#if defined(CONFIG_RANDOMIZE_BASE) +#define KERNEL_IMAGE_SIZE (1024 * 1024 * 1024) #else -#define KERNEL_IMAGE_SIZE KERNEL_IMAGE_SIZE_DEFAULT +#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) #endif #endif /* _ASM_X86_PAGE_64_DEFS_H */ |