Re: [PATCH v2 2/6] powerpc/kexec_file: Add KEXEC_SIG support.
From: Nayna <hidden>
Date: 2021-12-09 20:22:06
On 11/25/21 13:02, Michal Suchanek wrote:
quoted hunk ↗ jump to hunk
Copy the code from s390x Signed-off-by: Michal Suchanek<redacted> --- 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'" I see it happened because I didn't have MODULE_SIG enabled. Enabling MODULE_SIG fixes it. I wonder why not to add "depends on MODULE_SIG" rather than on MODULE_SIG_FORMAT. Thanks & Regards, - Nayna