Re: [PATCH v2 2/6] powerpc/kexec_file: Add KEXEC_SIG support.

[Nayna]

On 12/9/21 04:21, Michal Suchánek wrote:
> Hello,
Hi,
> On Wed, Dec 08, 2021 at 08:51:47PM -0500, Nayna wrote:
> > On 11/25/21 13:02, Michal Suchanek wrote:
> > > Copy the code from s390x
> > >
> > > Signed-off-by: Michal Suchanek<msuchanek@xxxxxxx>
> > > ---
> > >    arch/powerpc/Kconfig        | 11 +++++++++++
> > >    arch/powerpc/kexec/elf_64.c | 36 ++++++++++++++++++++++++++++++++++++
> > >    2 files changed, 47 insertions(+)
> > >
> > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> > > index ac0c515552fd..ecc1227a77f1 100644
> > > --- a/arch/powerpc/Kconfig
> > > +++ b/arch/powerpc/Kconfig
> > > @@ -561,6 +561,17 @@ config KEXEC_FILE
> > >    config ARCH_HAS_KEXEC_PURGATORY
> > >    	def_bool KEXEC_FILE
> > >
> > > +config KEXEC_SIG
> > > +	bool "Verify kernel signature during kexec_file_load() syscall"
> > > +	depends on KEXEC_FILE && MODULE_SIG_FORMAT
> > After manually applying the patch, the build is failing with the following
> > error:
> >
> > build failed with error "arch/powerpc/kexec/elf_64.o: In function
> > `elf64_verify_sig':
> > /root/kernel/linus/linux/arch/powerpc/kexec/elf_64.c:160: undefined
> > reference to `verify_appended_signature'"
> This patch does not add call to verify_appended_signature.
>
> Maybe you applied the following patch as well?

Yes, I tried build after applying all the patches.

Thanks & Regards,

    - Nayna