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