On Mon, 2017-10-02 at 20:59 +0200, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
[...]
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
>
> commit 814fb7bb7db5433757d76f4c4502c96fc53b0b5e upstream.
>
> [Please apply to 4.4-stable. Note: the backport includes the
> fpstate_init() call in xstateregs_set(), since fix is useless without
> it. It was added by commit 91c3dba7dbc1 ("x86/fpu/xstate: Fix PTRACE
> frames for XSAVES"), but it doesn't make sense to backport that whole
> commit.]
[...]
Why doesn't it make sense to backport that? It seems less important
than this fix, but it fixes a userspace-visible regression.
Ben.
--
Ben Hutchings
Software Developer, Codethink Ltd.