From: Jens Axboe <axboe@kernel.dk>
To: tj@kernel.org, josef@toxicpanda.com, paolo.valente@linaro.org,
yukuai3@huawei.com, jack@suse.cz,
Yu Kuai <yukuai1@huaweicloud.com>
Cc: cgroups@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, yi.zhang@huawei.com,
yangerkun@huawei.com
Subject: Re: [PATCH v2 block-6.2] block, bfq: fix uaf for bfqq in bic_set_bfqq()
Date: Sun, 29 Jan 2023 20:04:15 -0700 [thread overview]
Message-ID: <167504785585.199828.6199773692964530920.b4-ty@kernel.dk> (raw)
In-Reply-To: <20230130014136.591038-1-yukuai1@huaweicloud.com>
On Mon, 30 Jan 2023 09:41:36 +0800, Yu Kuai wrote:
> After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"),
> bic->bfqq will be accessed in bic_set_bfqq(), however, in some context
> bic->bfqq will be freed, and bic_set_bfqq() is called with the freed
> bic->bfqq.
>
> Fix the problem by always freeing bfqq after bic_set_bfqq().
>
> [...]
Applied, thanks!
[1/1] block, bfq: fix uaf for bfqq in bic_set_bfqq()
(no commit info)
Best regards,
--
Jens Axboe
prev parent reply other threads:[~2023-01-30 3:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-30 1:41 [PATCH v2 block-6.2] block, bfq: fix uaf for bfqq in bic_set_bfqq() Yu Kuai
2023-01-30 3:04 ` Jens Axboe [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=167504785585.199828.6199773692964530920.b4-ty@kernel.dk \
--to=axboe@kernel.dk \
--cc=cgroups@vger.kernel.org \
--cc=jack@suse.cz \
--cc=josef@toxicpanda.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=paolo.valente@linaro.org \
--cc=tj@kernel.org \
--cc=yangerkun@huawei.com \
--cc=yi.zhang@huawei.com \
--cc=yukuai1@huaweicloud.com \
--cc=yukuai3@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).