linux-kernel - Re: [PATCH for-6.12 0/4] block, bfq: fix corner cases related to bfqq merging

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <2ee05037-fb4f-4697-958b-46f0ae7d9cdd@kernel.dk>
Date: Tue, 3 Sep 2024 09:51:42 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Yu Kuai <yukuai1@...weicloud.com>, jack@...e.cz, tj@...nel.org,
 josef@...icpanda.com, paolo.valente@...more.it, mauro.andreolini@...more.it,
 avanzini.arianna@...il.com
Cc: cgroups@...r.kernel.org, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, yukuai3@...wei.com, yi.zhang@...wei.com,
 yangerkun@...wei.com
Subject: Re: [PATCH for-6.12 0/4] block, bfq: fix corner cases related to bfqq
 merging

On 9/2/24 7:03 AM, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@...wei.com>
> 
> Our syzkaller report a UAF problem(details in patch 1), however it can't
> be reporduced. And this set are some corner cases fix that might be
> related, and they are found by code review.
> 
> Yu Kuai (4):
>   block, bfq: fix possible UAF for bfqq->bic with merge chain
>   block, bfq: choose the last bfqq from merge chain in
>     bfq_setup_cooperator()
>   block, bfq: don't break merge chain in bfq_split_bfqq()
>   block, bfq: use bfq_reassign_last_bfqq() in bfq_bfqq_move()
> 
>  block/bfq-cgroup.c  |  7 +------
>  block/bfq-iosched.c | 17 +++++++++++------
>  block/bfq-iosched.h |  2 ++
>  3 files changed, 14 insertions(+), 12 deletions(-)

BFQ is effectively unmaintained, and has been for quite a while at
this point. I'll apply these, thanks for looking into it, but I think we
should move BFQ to an unmaintained state at this point.

-- 
Jens Axboe