From: Zhang Yi <yi.zhang@huawei.com>
To: yebin <yebin10@huawei.com>, <viro@zeniv.linux.org.uk>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
<linux-fsdevel@vger.kernel.org>, <yeweihua4@huawei.com>
Subject: Re: [QUESTION] Question about 'epoll: do not insert into poll queues until all,sanity checks are done'
Date: Fri, 28 Jan 2022 16:41:25 +0800 [thread overview]
Message-ID: <5e19830c-8653-e575-78db-ddcfc76839cc@huawei.com> (raw)
In-Reply-To: <61F3504C.8060001@huawei.com>
+CC linux-kernel@vger.kernel.org and linux-fsdevel@vger.kernel.org mail list.
On 2022/1/28 10:09, yebin wrote:
> Hi, AL.
> I'm sorry to bother you.
> Now there is a CVE(CVE-2021-39634) which discription is "In fs/eventpoll.c, there is a possible use after free".
> The information disclosed now shows that fix patch is "epoll: do not insert into poll queues until all
> sanity checks are done" which you submitted.
> According to the patch modification, I reverse analyze how to generate use-after-free .After analysis for several days,
> I tried to reproduce it, but I didn't find any use-after-free.
> Do you have any suggestions for the use-after-free described by CVE-2021-39634?
parent reply other threads:[~2022-01-28 8:41 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <61F3504C.8060001@huawei.com>]
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=5e19830c-8653-e575-78db-ddcfc76839cc@huawei.com \
--to=yi.zhang@huawei.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=viro@zeniv.linux.org.uk \
--cc=yebin10@huawei.com \
--cc=yeweihua4@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).