From: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
To: Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Nicholas Tang <nicholas.tang@mediatek.com>,
Miles Chen <miles.chen@mediatek.com>
Cc: <kasan-dev@googlegroups.com>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>, <wsd_upstream@mediatek.com>,
Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Subject: [PATCH v3 0/1] Fix object remain in offline per-cpu quarantine
Date: Wed, 2 Dec 2020 15:53:04 +0800 [thread overview]
Message-ID: <1606895585-17382-1-git-send-email-Kuan-Ying.Lee@mediatek.com> (raw)
This patch fixes object remain in the offline per-cpu quarantine as
describe below.
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(+)
--
2.18.0
next reply other threads:[~2020-12-02 7:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-02 7:53 Kuan-Ying Lee [this message]
2020-12-02 7:53 ` [PATCH v3 1/1] kasan: fix object remain in offline per-cpu quarantine Kuan-Ying Lee
2020-12-02 8:26 ` Dmitry Vyukov
2020-12-03 12:46 ` Andrey Konovalov
2020-12-03 20:28 ` Andrew Morton
2020-12-04 2:26 ` Kuan-Ying Lee
2020-12-03 17:10 ` Qian Cai
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