Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934053AbcCNKn6 (ORCPT ); Mon, 14 Mar 2016 06:43:58 -0400 Received: from mail-wm0-f51.google.com ([74.125.82.51]:36756 "EHLO mail-wm0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933993AbcCNKnu (ORCPT ); Mon, 14 Mar 2016 06:43:50 -0400 From: Alexander Potapenko To: adech.fo@gmail.com, cl@linux.com, dvyukov@google.com, akpm@linux-foundation.org, ryabinin.a.a@gmail.com, rostedt@goodmis.org, iamjoonsoo.kim@lge.com, js1304@gmail.com, kcc@google.com Cc: kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v7 0/7] SLAB support for KASAN Date: Mon, 14 Mar 2016 11:43:38 +0100 Message-Id: X-Mailer: git-send-email 2.7.0.rc3.207.g0ac5344 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4215 Lines: 97 This patch set implements SLAB support for KASAN Unlike SLUB, SLAB doesn't store allocation/deallocation stacks for heap objects, therefore we reimplement this feature in mm/kasan/stackdepot.c. The intention is to ultimately switch SLUB to use this implementation as well, which will save a lot of memory (right now SLUB bloats each object by 256 bytes to store the allocation/deallocation stacks). Also neither SLUB nor SLAB delay the reuse of freed memory chunks, which is necessary for better detection of use-after-free errors. We introduce memory quarantine (mm/kasan/quarantine.c), which allows delayed reuse of deallocated memory. Alexander Potapenko (7): kasan: Modify kmalloc_large_oob_right(), add kmalloc_pagealloc_oob_right() mm, kasan: SLAB support mm, kasan: Added GFP flags to KASAN API arch, ftrace: For KASAN put hard/soft IRQ entries into separate sections mm, kasan: Stackdepot implementation. Enable stackdepot for SLAB kasan: Test fix: Warn if the UAF could not be detected in kmalloc_uaf2 mm: kasan: Initial memory quarantine implementation --- v2: - merged two patches that touched kmalloc_large_oob_right - moved stackdepot implementation to lib/ - moved IRQ definitions to include/linux/interrupt.h v3: - minor description changes - store deallocation info in the "mm, kasan: SLAB support" patch v4: - fix kbuild error reports v5: - SLAB allocator, stackdepot: adopted suggestions by Andrey Ryabinin - IRQ: fixed kbuild warnings v6: - stackdepot: fixed kbuild warnings, simplified kasan_track, use vmalloc() for depot when possible - quarantine: improved patch description, removed dead code v7: - fix kbuild error reports --- Documentation/kasan.txt | 5 +- arch/arm/include/asm/exception.h | 2 +- arch/arm/kernel/vmlinux.lds.S | 1 + arch/arm64/include/asm/exception.h | 2 +- arch/arm64/kernel/vmlinux.lds.S | 1 + arch/blackfin/kernel/vmlinux.lds.S | 1 + arch/c6x/kernel/vmlinux.lds.S | 1 + arch/metag/kernel/vmlinux.lds.S | 1 + arch/microblaze/kernel/vmlinux.lds.S | 1 + arch/mips/kernel/vmlinux.lds.S | 1 + arch/nios2/kernel/vmlinux.lds.S | 1 + arch/openrisc/kernel/vmlinux.lds.S | 1 + arch/parisc/kernel/vmlinux.lds.S | 1 + arch/powerpc/kernel/vmlinux.lds.S | 1 + arch/s390/kernel/vmlinux.lds.S | 1 + arch/sh/kernel/vmlinux.lds.S | 1 + arch/sparc/kernel/vmlinux.lds.S | 1 + arch/tile/kernel/vmlinux.lds.S | 1 + arch/x86/kernel/Makefile | 1 + arch/x86/kernel/vmlinux.lds.S | 1 + include/asm-generic/vmlinux.lds.h | 12 +- include/linux/ftrace.h | 11 -- include/linux/interrupt.h | 20 +++ include/linux/kasan.h | 63 ++++++-- include/linux/slab.h | 10 +- include/linux/slab_def.h | 14 ++ include/linux/slub_def.h | 11 ++ include/linux/stackdepot.h | 32 ++++ kernel/softirq.c | 2 +- kernel/trace/trace_functions_graph.c | 1 + lib/Kconfig | 4 + lib/Kconfig.kasan | 5 +- lib/Makefile | 3 + lib/stackdepot.c | 301 +++++++++++++++++++++++++++++++++++ lib/test_kasan.c | 59 ++++++- mm/Makefile | 1 + mm/kasan/Makefile | 4 + mm/kasan/kasan.c | 219 +++++++++++++++++++++++-- mm/kasan/kasan.h | 44 +++++ mm/kasan/quarantine.c | 289 +++++++++++++++++++++++++++++++++ mm/kasan/report.c | 63 ++++++-- mm/mempool.c | 23 +-- mm/page_alloc.c | 2 +- mm/slab.c | 53 +++++- mm/slab.h | 4 +- mm/slab_common.c | 8 +- mm/slub.c | 19 +-- 47 files changed, 1211 insertions(+), 92 deletions(-) create mode 100644 include/linux/stackdepot.h create mode 100644 lib/stackdepot.c create mode 100644 mm/kasan/quarantine.c -- 2.7.0.rc3.207.g0ac5344