* Re: [QUESTION] Question about 'epoll: do not insert into poll queues until all,sanity checks are done'
[not found] ` <61F3504C.8060001@huawei.com>
@ 2022-01-28 8:41 ` Zhang Yi
0 siblings, 0 replies; only message in thread
From: Zhang Yi @ 2022-01-28 8:41 UTC (permalink / raw)
To: yebin, viro; +Cc: Linux Kernel Mailing List, linux-fsdevel, yeweihua4
+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?
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[not found] ` <61F3504C.8060001@huawei.com>
2022-01-28 8:41 ` [QUESTION] Question about 'epoll: do not insert into poll queues until all,sanity checks are done' Zhang Yi
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