Hello Alexander/Andrey/Dmitry/Reviewers, Submitting v3 for your review/consideration. First patch provides more reliable double-free detection for KASAN. Second patch provides new double-free tests for 'test_kasan'.
Major changes from v2: o object lock/unlock simplified to use generic bit spinlock apis instead of custom CAS loop. A 'safety valve' is provided for lock in case an out-of-bounds write flips lock bit. o test_kasan concurrent double-free test simplified to use on_each_cpu_mask() instead of custom threads. v2 link: https://lkml.org/lkml/2016/5/6/210 Patchset is based on linux-next 'next-20160524'. Thanks, Kuthonuzo 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 | 88 ++++++++++++++++++++++++++++++++++--------------- mm/kasan/kasan.h | 44 +++++++++++++++++++++++- mm/kasan/quarantine.c | 2 + mm/kasan/report.c | 28 ++++++++++++++-- mm/slab.c | 3 +- mm/slub.c | 2 +- 8 files changed, 185 insertions(+), 36 deletions(-)
