get_file() unsafe under epoll (was Re: [syzbot] [fs?] [io-uring?] general protection fault in __ep_remove)

[David Laight]

From: Linus Torvalds
> Sent: 06 May 2024 19:18
...
> Which is why I applied the minimal patch for just "refcount over
> vfs_poll()", and am just mentioning my suggestion in the hope that
> some eager beaver would like to see how painful it would do to make
> the bigger surgery...

I wonder if I can work out how it (doesn't) currently work...

	David

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