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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?