[PATCH v3 0/1] Fix object remain in offline per-cpu quarantine
Kuan-Ying.Lee at mediatek.com
Wed Dec 2 02:53:04 EST 2020
This patch fixes object remain in the offline per-cpu quarantine as
Free objects will get into per-cpu quarantine if enable generic KASAN.
If a cpu is offline and users use kmem_cache_destroy, kernel will detect
objects still remain in the offline per-cpu quarantine and report error.
Register a cpu hotplug function to remove all objects in the offline
per-cpu quarantine when cpu is going offline. Set a per-cpu variable
to indicate this cpu is offline.
Changes since v3:
- Add a barrier to ensure the ordering
- Rename the init function
Changes since v2:
- Thanks for Dmitry suggestion
- Remove unnecessary code
- Put offline variable into cpu_quarantine
- Use single qlist_free_all call instead of iteration over all slabs
- Add bug reporter in commit message
Kuan-Ying Lee (1):
kasan: fix object remain in offline per-cpu quarantine
mm/kasan/quarantine.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
More information about the linux-arm-kernel