Re: [PATCH] userfaultfd: avoid the duplicated release for userfaultfd_ctx

[Al Viro]

On Sun, Jul 19, 2020 at 09:58:34PM +0800, Xu, Yanfei wrote:
> ping Al Viro
> 
> Could you please help to review this patch? Thanks a lot.

That's -next, right?  As for the patch itself...  Frankly,
Daniel's patch looks seriously wrong.
	* why has O_CLOEXEC been quietly smuggled in?  It's
a userland ABI change, for fsck sake...
	* the double-put you've spotted
	* the whole out: thing - just make it
	if (IS_ERR(file)) {
		userfaultfd_ctx_put(ctx);
		return PTR_ERR(file);
	}
	and be done with that.