linux-kernel - [PATCH v4 0/7] SLAB support for KASAN

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Message-Id: <cover.1456504662.git.glider@google.com>
Date:	Fri, 26 Feb 2016 17:48:40 +0100
From:	Alexander Potapenko <glider@...gle.com>
To:	adech.fo@...il.com, cl@...ux.com, dvyukov@...gle.com,
	akpm@...ux-foundation.org, ryabinin.a.a@...il.com,
	rostedt@...dmis.org, iamjoonsoo.kim@....com, js1304@...il.com,
	kcc@...gle.com
Cc:	kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH v4 0/7] SLAB support for KASAN

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
---
 Documentation/kasan.txt              |   5 +-
 arch/arm/kernel/vmlinux.lds.S        |   1 +
 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.kasan                    |   4 +-
 lib/Makefile                         |   7 +
 lib/stackdepot.c                     | 274 +++++++++++++++++++++++++++++++
 lib/test_kasan.c                     |  59 ++++++-
 mm/Makefile                          |   1 +
 mm/kasan/Makefile                    |   4 +
 mm/kasan/kasan.c                     | 221 +++++++++++++++++++++++--
 mm/kasan/kasan.h                     |  45 ++++++
 mm/kasan/quarantine.c                | 306 +++++++++++++++++++++++++++++++++++
 mm/kasan/report.c                    |  71 ++++++--
 mm/mempool.c                         |  23 +--
 mm/page_alloc.c                      |   2 +-
 mm/slab.c                            |  58 ++++++-
 mm/slab.h                            |   2 +
 mm/slab_common.c                     |   8 +-
 mm/slub.c                            |  21 +--
 44 files changed, 1214 insertions(+), 90 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