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
---
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 | 6 +
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 | 69 ++++++--
mm/mempool.c | 23 +--
mm/page_alloc.c | 2 +-
mm/slab.c | 58 ++++++-
mm/slab.h | 4 +
mm/slab_common.c | 8 +-
mm/slub.c | 21 +--
44 files changed, 1212 insertions(+), 88 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
