Re: [PATCH] x86: Use __nostackprotect for sme_encrypt_kernel

[Ingo Molnar]

* Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:

> On Sat, Jan 20, 2018 at 08:16:31PM -0800, Linus Torvalds wrote:
> > On Sat, Jan 20, 2018 at 5:49 PM, Gabriel C <nix.or.die@xxxxxxxxx> wrote:
> > >
> > > Added stable to CC since the patch series this patch fixes
> > > is in stable-queue.
> > 
> > Oh, it wasn't clear from the commit message. But I guess the "Fixes:"
> > tag would have caught Greg's eye regardless.
> 
> Ugh, I am _so_ behind in looking at patches that only have a Fixes: tag
> in it and not a "Cc: stable@" tag, due to the recent high-volume of the
> latter.
> 
> But they will end up in a mbox that I need to dig out of eventually, but
> it will take time, so if you know you want a patch in a stable release,
> it's much easier to just use the "Cc: stable@" tag please.

Just to make it easier, please put this upstream fix into -stable:

  91cfc88c66bf: ("x86: Use __nostackprotect for sme_encrypt_kernel")

I believe all the prerequisite upstream commits are in -stable already:

 1303880179e6: x86/mm: Clean up register saving in the __enc_copy() assembly code
 bacf6b499e11: x86/mm: Use a struct to reduce parameters for SME PGD mapping
 2b5d00b6c2cd: x86/mm: Centralize PMD flags in sme_encrypt_kernel()
 cc5f01e28d6c: x86/mm: Prepare sme_encrypt_kernel() for PAGE aligned encryption
 107cd2532181: x86/mm: Encrypt the initrd earlier for BSP microcode update

Thanks,

	Ingo