[PATCH v5 0/6] KEXEC_SIG with appended signature

Michal Suchanek
2022-01-11T11:37:58Z

Hello,

This is a refresh of the KEXEC_SIG series.

This adds KEXEC_SIG support on powerpc and deduplicates the code dealing
with appended signatures in the kernel.

powerpc supports IMA_KEXEC but that's an exception rather than the norm.
On the other hand, KEXEC_SIG is portable across platforms.

For distributions to have uniform security features across platforms one
option should be used on all platforms.

Thanks

Michal

Previous revision: https://lore.kernel.org/linuxppc-dev/cover.1637862358.git.msuchanek@suse.de/
Patched kernel tree: https://github.com/hramrach/kernel/tree/kexec_sig

Michal Suchanek (6):
s390/kexec_file: Don't opencode appended signature check.
powerpc/kexec_file: Add KEXEC_SIG support.
kexec_file: Don't opencode appended signature verification.
module: strip the signature marker in the verification function.
module: Use key_being_used_for for log messages in
verify_appended_signature
module: Move duplicate mod_check_sig users code to mod_parse_sig

arch/powerpc/Kconfig | 16 +++++++
arch/powerpc/kexec/elf_64.c | 12 +++++
arch/s390/Kconfig | 2 +-
arch/s390/kernel/machine_kexec_file.c | 41 +----------------
crypto/asymmetric_keys/asymmetric_type.c | 1 +
include/linux/module_signature.h | 4 +-
include/linux/verification.h | 5 ++
kernel/module-internal.h | 2 -
kernel/module.c | 12 ++---
kernel/module_signature.c | 58 +++++++++++++++++++++++-
kernel/module_signing.c | 34 ++++++--------
security/integrity/ima/ima_modsig.c | 22 ++-------
12 files changed, 119 insertions(+), 90 deletions(-)

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2.31.1