[PATCH 0/3] bfq: Avoid use-after-free when moving processes between cgroups

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To: <linux-block@xxxxxxxxxxxxxxx>
Subject: [PATCH 0/3] bfq: Avoid use-after-free when moving processes between cgroups
From: Jan Kara <jack@xxxxxxx>
Date: Thu, 23 Dec 2021 18:31:56 +0100
Cc: Jens Axboe <axboe@xxxxxxxxx>, Paolo Valente <paolo.valente@xxxxxxxxxx>, "yukuai (C)" <yukuai3@xxxxxxxxxx>, Jan Kara <jack@xxxxxxx>

Hello,

these three patches fix use-after-free issues in BFQ when processes with merged
queues get moved to different cgroups. The patches have survived some beating
in my test VM but so far I fail to reproduce the original KASAN reports so
testing from people who can reproduce them is most welcome. Thanks!

								Honza

Follow-Ups:
- Re: [PATCH 0/3] bfq: Avoid use-after-free when moving processes between cgroups
  - From: yukuai (C)
- [PATCH 3/3] bfq: Split shared queues on move between cgroups
  - From: Jan Kara
- [PATCH 2/3] bfq: Avoid merging queues with different parents
  - From: Jan Kara
- [PATCH 1/3] bfq: Avoid false marking of bic as stably merged
  - From: Jan Kara

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