Messages in this thread | | | From | Nageswara R Sastry <> | Subject | Re: [PATCH v6 3/6] x86/kexec: Carry forward IMA measurement log on kexec | Date | Wed, 20 Jul 2022 13:44:50 +0000 |
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________________________________________ > From: Stefan Berger <stefanb@linux.ibm.com> > Sent: 07 July 2022 10:50 PM > To: kexec@lists.infradead.org; devicetree@vger.kernel.org; linux-integrity@vger.kernel.org; linux-kernel@vger.kernel.org; linuxppc-dev@lists.ozlabs.org > Cc: nayna@linux.ibm.com; Nageswara R Sastry; mpe@ellerman.id.au; Jonathan McDowell; Borislav Petkov; Mimi Zohar > Subject: [PATCH v6 3/6] x86/kexec: Carry forward IMA measurement log on kexec
> From: Jonathan McDowell <noodles@fb.com>
> 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@fb.com> > Signed-off-by: Borislav Petkov <bp@suse.de> > Reviewed-by: Mimi Zohar <zohar@linux.ibm.com> # IMA function definitions > Link: https://lore.kernel.org/r/YmKyvlF3my1yWTvK@noodles-fedora-PC23Y6EG > --- Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
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