On Mon, Sep 27, 2021 at 7:44 AM syzbot
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
commit: 5816b3e6 Linux 5.15-rc3
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=41799858eb55f380
dashboard link: https://syzkaller.appspot.com/bug?extid=398e7dc692ddbbb4cfec
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Note: testing is done by a robot and is best-effort only.
Confirm the patch you posted  is the real fix of this bug report.
I tested the patch from Yanfei Xu  in my local workspace, and the
memory leak is still triggered. In addition, I have pushed a patch
request for that patch. The result would prove that patch is not
working for this bug.
BTW, there occur incorrect fix commits on the syzbot dashboard
sometimes. Maybe it should be cleaned in the future.