Re: [PATCH v7 3/6] x86/kexec: Carry forward IMA measurement log on kexec

[Stefan Berger]

On 8/12/22 13:10, Borislav Petkov wrote:
> On Fri, Aug 12, 2022 at 12:43:02PM -0400, Stefan Berger wrote:
> > From: Jonathan McDowell <noodles@xxxxxx>
> >
> > On kexec file load, the Integrity Measurement Architecture (IMA)
> > subsystem may verify the IMA signature of the kernel and initramfs, and
> > measure it. The command line parameters passed to the kernel in the
> > kexec call may also be measured by IMA.
> >
> > A remote attestation service can verify a TPM quote based on the TPM
> > event log, the IMA measurement list and the TPM PCR data. This can
> > be achieved only if the IMA measurement log is carried over from the
> > current kernel to the next kernel across the kexec call.
> >
> > PowerPC and ARM64 both achieve this using device tree with a
> > "linux,ima-kexec-buffer" node. x86 platforms generally don't make use of
> > device tree, so use the setup_data mechanism to pass the IMA buffer to
> > the new kernel.
> >
> > Signed-off-by: Jonathan McDowell <noodles@xxxxxx>
> > Signed-off-by: Borislav Petkov <bp@xxxxxxx>
> > Reviewed-by: Mimi Zohar <zohar@xxxxxxxxxxxxx> # IMA function definitions
> > Link: https://lore.kernel.org/r/YmKyvlF3my1yWTvK@noodles-fedora-PC23Y6EG
>
> Is there any particular reason to keep sending a patch which is already
> upstream?

Yes, so this series can be tested by krobot. I only based this series on 
5.19 so far, so if it's upstreamed since then it will go missing next 
time when I base  it on 5.20-rc1 or so.