Hi, This patchset implements kernel address sanitizer for ppc64. Since ppc64 virtual address range is divided into different regions, we can't have one contigous area for the kasan shadow range. Hence we don't support the INLINE kasan instrumentation. With Outline instrumentation, we override the shadow_to_mem and mem_to_shadow callbacks, so that we map only the kernel linear range (ie, region with ID 0xc). For region with ID 0xd and 0xf (vmalloc and vmemmap ) we return the address of the zero page. This works because kasan doesn't track both vmemmap and vmalloc address.
Aneesh Kumar K.V (8): powerpc/mm: Add virt_to_pfn and use this instead of opencoding kasan: MODULE_VADDR is not available on all archs kasan: Rename kasan_enabled to kasan_report_enabled kasan: Don't use kasan shadow pointer in generic functions kasan: Enable arch to hook into kasan callbacks. kasan: Allow arch to overrride kasan shadow offsets powerpc/mm: kasan: Add kasan support for ppc64 powerpc: Disable kasan for kernel/ and mm/ directory -aneesh arch/powerpc/include/asm/kasan.h | 74 ++++++++++++++++++++++++++++++++ arch/powerpc/include/asm/page.h | 5 ++- arch/powerpc/include/asm/pgtable-ppc64.h | 1 + arch/powerpc/include/asm/ppc_asm.h | 10 +++++ arch/powerpc/include/asm/string.h | 13 ++++++ arch/powerpc/kernel/Makefile | 2 + arch/powerpc/kernel/prom_init_check.sh | 2 +- arch/powerpc/kernel/setup_64.c | 3 ++ arch/powerpc/lib/mem_64.S | 6 ++- arch/powerpc/lib/memcpy_64.S | 3 +- arch/powerpc/lib/ppc_ksyms.c | 10 +++++ arch/powerpc/mm/Makefile | 4 ++ arch/powerpc/mm/kasan_init.c | 44 +++++++++++++++++++ arch/powerpc/mm/slb_low.S | 4 ++ arch/powerpc/platforms/Kconfig.cputype | 1 + include/linux/kasan.h | 3 ++ mm/kasan/kasan.c | 9 ++++ mm/kasan/kasan.h | 20 ++++++++- mm/kasan/report.c | 19 ++++---- 19 files changed, 216 insertions(+), 17 deletions(-) create mode 100644 arch/powerpc/include/asm/kasan.h create mode 100644 arch/powerpc/mm/kasan_init.c -- 2.5.0 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
