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Muchun Song f6e6ea16d7 UPSTREAM: mm: kfence: fix objcgs vector allocation 
commit 8f0b36497303487d5a32c75789c77859cc2ee895 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 19cbd78fb2)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ia73f33f5053ed1941a8c2485f2027b8e4ed1cd25
 		2022-05-18 13:03:54 +02:00
..
Makefile kfence: add test suite 2021-02-26 09:41:02 -08:00
core.c UPSTREAM: mm: kfence: fix objcgs vector allocation 2022-05-18 13:03:54 +02:00
kfence.h UPSTREAM: mm: kfence: fix objcgs vector allocation 2022-05-18 13:03:54 +02:00
kfence_test.c Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
report.c mm, kfence: support kmem_dump_obj() for KFENCE objects 2022-04-27 14:38:51 +02:00