RE: [PATCH] libnvdimm/pmem: Bypass CONFIG_HARDENED_USERCOPY overhead

David Laight
2019-05-17T16:14:09Z

From: Kees Cook
> Sent: 17 May 2019 16:54
...
> > I've changed some of our code to use __get_user() to avoid
> > these stupid overheads.
>
> __get_user() skips even access_ok() checking too, so that doesn't seem
> like a good idea. Did you run access_ok() checks separately? (This
> generally isn't recommended.)

Of course, I'm not THAT stupid :-)

David

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