Commit-ID: 4a1a8e1b8f9f37bdbba416eb0a5ff3f47d31cb28 Gitweb: http://git.kernel.org/tip/4a1a8e1b8f9f37bdbba416eb0a5ff3f47d31cb28 Author: Borislav Petkov <b...@suse.de> AuthorDate: Wed, 27 Jul 2016 14:09:39 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Wed, 27 Jul 2016 14:59:59 +0200
x86/asm, x86/microcode: Add __PAGE_OFFSET_BASE define on 32-bit ... in order to avoid #ifdeffery in code computing the ASLR randomization offset. Remove that #ifdeffery in the microcode loader. Suggested-by: Kees Cook <keesc...@chromium.org> Signed-off-by: Borislav Petkov <b...@suse.de> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Nicolai Stange <nicsta...@gmail.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Garnier <thgar...@google.com> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/20160727120939.ga18...@nazgul.tnic Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/include/asm/page_32_types.h | 3 ++- arch/x86/kernel/cpu/microcode/intel.c | 2 -- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/asm/page_32_types.h b/arch/x86/include/asm/page_32_types.h index 3a52ee0..3bae496 100644 --- a/arch/x86/include/asm/page_32_types.h +++ b/arch/x86/include/asm/page_32_types.h @@ -13,7 +13,8 @@ * If you want more physical memory than this then see the CONFIG_HIGHMEM4G * and CONFIG_HIGHMEM64G options in the kernel configuration. */ -#define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) +#define __PAGE_OFFSET_BASE _AC(CONFIG_PAGE_OFFSET, UL) +#define __PAGE_OFFSET __PAGE_OFFSET_BASE #define __START_KERNEL_map __PAGE_OFFSET diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c index 0f97ae9..cdc0dea 100644 --- a/arch/x86/kernel/cpu/microcode/intel.c +++ b/arch/x86/kernel/cpu/microcode/intel.c @@ -818,13 +818,11 @@ void load_ucode_intel_ap(void) if (blobs_p->valid) { start = blobs_p->start; -#ifdef CONFIG_RANDOMIZE_MEMORY /* * Pay attention to CONFIG_RANDOMIZE_MEMORY=y as it shuffles * physmem mapping too and there we have the initrd. */ start += PAGE_OFFSET - __PAGE_OFFSET_BASE; -#endif } collect_cpu_info_early(&uci);
