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authorMuchun Song <songmuchun@bytedance.com>2022-04-01 11:28:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-04-01 11:46:09 -0700
commit8f0b36497303487d5a32c75789c77859cc2ee895 (patch)
tree232415b951aae1b938d87e1739f99117bddf476f /.mailmap
parentadb11e78c5dc5e26774acb05f983da36447f7911 (diff)
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: d3fb45f370d9 ("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>
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