From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp02.in.ibm.com (e28smtp02.in.ibm.com [122.248.162.2]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 12D851A077B for ; Wed, 26 Aug 2015 18:26:53 +1000 (AEST) Received: from /spool/local by e28smtp02.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 26 Aug 2015 13:56:50 +0530 Received: from d28relay01.in.ibm.com (d28relay01.in.ibm.com [9.184.220.58]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id 70962125805E for ; Wed, 26 Aug 2015 13:56:10 +0530 (IST) Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay01.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t7Q8QejU3604664 for ; Wed, 26 Aug 2015 13:56:41 +0530 Received: from d28av05.in.ibm.com (localhost [127.0.0.1]) by d28av05.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t7Q8QdV4025119 for ; Wed, 26 Aug 2015 13:56:39 +0530 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> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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