Re: [PATCH v5 0/6] KEXEC_SIG with appended signature

On Wed, Feb 09, 2022 at 03:46:05PM +1100, Michael Ellerman wrote:

Luis Chamberlain [off-list ref] writes:

quoted

On Tue, Jan 11, 2022 at 12:37:42PM +0100, Michal Suchanek wrote:

quoted

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/ (local)
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

What tree should this go through? I'd prefer if over through modules
tree as it can give a chance for Aaron Tomlin to work with this for his
code refactoring of kernel/module*.c to kernel/module/

Yeah that's fine by me, the arch changes are pretty minimal and unlikely
to conflict much.

Ok sounds good thanks.

  Luis