* [PATCH v4 0/2] KASAN double-free detection
@ 2016-05-29 16:10 Kuthonuzo Luruo
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From: Kuthonuzo Luruo @ 2016-05-29 16:10 UTC (permalink / raw)
To: aryabinin, glider, dvyukov, cl, penberg, rientjes, iamjoonsoo.kim, akpm
Cc: kasan-dev, linux-kernel, ynorov, kuthonuzo.luruo
Submitting v4 for your review/consideration. First patch provides more
reliable double-free detection for KASAN. Second patch provides new
double-free tests for 'test_kasan'.
"Lock break" on out-of-bounds (OOB) write detection in patch v3 suffers
from one fatal flaw: it's not possible to distinguish between when lock bit
is set because a holder exists or because it got flipped by OOB.
Patch v4 (this patch) solves the issue by exploiting header shadow memory
for storing the per-object header lock bit. This makes locking more
resilient even in the presence of OOB writes on header.
v3 link: https://lkml.org/lkml/2016/5/24/577
Patchset is based on linux-next 'next-20160527'.
Kuthonuzo Luruo (2):
mm, kasan: improve double-free detection
kasan: add double-free tests
include/linux/kasan.h | 7 ++-
lib/test_kasan.c | 47 ++++++++++++++++++
mm/kasan/kasan.c | 125 ++++++++++++++++++++++++++++++++++++++-----------
mm/kasan/kasan.h | 24 +++++++++-
mm/kasan/quarantine.c | 4 +-
mm/kasan/report.c | 24 +++++++++-
mm/slab.c | 3 +-
mm/slub.c | 2 +-
8 files changed, 200 insertions(+), 36 deletions(-)
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