Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756479AbbHZI0w (ORCPT ); Wed, 26 Aug 2015 04:26:52 -0400 Received: from e28smtp03.in.ibm.com ([122.248.162.3]:49965 "EHLO e28smtp03.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756289AbbHZI0t (ORCPT ); Wed, 26 Aug 2015 04:26:49 -0400 X-Helo: d28dlp02.in.ibm.com X-MailFrom: aneesh.kumar@linux.vnet.ibm.com X-RcptTo: linux-kernel@vger.kernel.org From: "Aneesh Kumar K.V" To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, ryabinin.a.a@gmail.com Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, "Aneesh Kumar K.V" Subject: [PATCH V2 00/10] KASan ppc64 support Date: Wed, 26 Aug 2015 13:56:08 +0530 Message-Id: <1440577578-15813-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.5.0 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15082608-0009-0000-0000-00000749A55A Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3488 Lines: 71 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. Known issues: * Kasan is not yet enabled for arch/powerpc/kvm * kexec hang * outline stack and global support Once we fix the kexec hang, we can look at merging ppc64 patch. IMHO kasan changes can be reviewed/merged earlier Aneesh Kumar K.V (10): 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 kasan: Make INLINE KASan support arch selectable kasan: Update feature support file kasan: Prevent deadlock in kasan reporting powerpc/mm: kasan: Add kasan support for ppc64 .../debug/KASAN/KASAN_INLINE/arch-support.txt | 40 ++++++++++++ .../KASAN/{ => KASAN_OUTLINE}/arch-support.txt | 0 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 | 5 ++ arch/powerpc/kernel/prom_init_check.sh | 2 +- arch/powerpc/kernel/setup_64.c | 3 + arch/powerpc/kvm/Makefile | 1 + 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 | 7 ++ arch/powerpc/mm/kasan_init.c | 44 +++++++++++++ arch/powerpc/mm/slb_low.S | 4 ++ arch/powerpc/platforms/Kconfig.cputype | 1 + arch/x86/Kconfig | 1 + include/linux/kasan.h | 3 + lib/Kconfig.kasan | 2 + mm/kasan/kasan.c | 9 +++ mm/kasan/kasan.h | 20 +++++- mm/kasan/report.c | 29 ++++++--- scripts/Makefile.kasan | 28 ++++---- 25 files changed, 290 insertions(+), 31 deletions(-) create mode 100644 Documentation/features/debug/KASAN/KASAN_INLINE/arch-support.txt rename Documentation/features/debug/KASAN/{ => KASAN_OUTLINE}/arch-support.txt (100%) create mode 100644 arch/powerpc/include/asm/kasan.h create mode 100644 arch/powerpc/mm/kasan_init.c -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/