linux-kernel - [PATCH 0/1] Fix objects remain in the offline per-cpu quarantine

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Message-ID: <1605162252-23886-1-git-send-email-Kuan-Ying.Lee@mediatek.com>
Date:   Thu, 12 Nov 2020 14:24:11 +0800
From:   Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>
To:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <kasan-dev@...glegroups.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <wsd_upstream@...iatek.com>,
        <miles.chen@...iatek.com>, <nicholas.tang@...iatek.com>,
        Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>
Subject: [PATCH 0/1] Fix objects remain in the offline per-cpu quarantine

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.

Kuan-Ying Lee (1):
  kasan: fix object remain in offline per-cpu quarantine

 mm/kasan/quarantine.c | 59 +++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 57 insertions(+), 2 deletions(-)

-- 
2.18.0