The first 7 patches are cleanup and minor bugfixes on the x86 KASLR code. The last one is a bit of an RFC. The memory regions used for KASLR are stored as 64-bit even on a 32-bit kernel. However there are still a few local variables that are 32-bit, but should be ok as far as I can see because they are assigned values that have been already limited to 32-bit. It does make it a little harder to verify that the code is correct. Since KASLR cannot actually use 64-bit regions for the 32-bit kernel, the patch reduces regions to their below-4G segment when creating them, making the actual variables 32-bit. Alternatively, the few local variables could be upgraded to 64-bit.
v1->v2: - Fix a bug in the bugfix 5/8: overlap.start can be smaller than region.start, so shouldn't subtract before comparing. Arvind Sankar (8): x86/kaslr: Make command line handling safer x86/kaslr: Remove bogus warning and unnecessary goto x86/kaslr: Fix process_efi_entries comment x86/kaslr: Initialize mem_limit to the real maximum address x86/kaslr: Simplify __process_mem_region x86/kaslr: Simplify process_gb_huge_pages x86/kaslr: Clean up slot handling x86/kaslr: Don't use 64-bit mem_vector for 32-bit kernel arch/x86/boot/compressed/acpi.c | 7 +- arch/x86/boot/compressed/kaslr.c | 228 ++++++++++++------------------- arch/x86/boot/compressed/misc.h | 19 ++- 3 files changed, 111 insertions(+), 143 deletions(-) -- 2.26.2
