linux/mm/kfence
Muchun Song 8f0b364973 mm: kfence: fix objcgs vector allocation
If the kfence object is allocated to be used for objects vector, then
this slot of the pool eventually being occupied permanently since the
vector is never freed.  The solutions could be (1) freeing vector when
the kfence object is freed or (2) allocating all vectors statically.

Since the memory consumption of object vectors is low, it is better to
chose (2) to fix the issue and it is also can reduce overhead of vectors
allocating in the future.

Link: https://lkml.kernel.org/r/20220328132843.16624-1-songmuchun@bytedance.com
Fixes: d3fb45f370 ("mm, kfence: insert KFENCE hooks for SLAB")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-04-01 11:46:09 -07:00
..
core.c mm: kfence: fix objcgs vector allocation 2022-04-01 11:46:09 -07:00
kfence_test.c kfence: test: try to avoid test_gfpzero trigger rcu_stall 2022-03-22 15:57:11 -07:00
kfence.h mm: kfence: fix objcgs vector allocation 2022-04-01 11:46:09 -07:00
Makefile mm/kfence: remove unnecessary CONFIG_KFENCE option 2022-03-22 15:57:11 -07:00
report.c Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00