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

Michael Ellerman
2022-02-09T05:18:35Z

Luis Chamberlain <mcgrof@kernel.org> writes:
> On Tue, Jan 11, 2022 at 12:37:42PM +0100, Michal Suchanek wrote:
>> 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
>
> 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.

cheers