Updated version with Petr's feedback. It looks a bit different and
better now (I would say). Not that it should be considered before we
decide what to do with late module patching, but I finished it before
the discussion started and someone could be interested.
v1: http://lore.kernel.org/r/[email protected]
Tested on x86_64, ppc64le and s390x. Cross-compiled on arm64 to verify
that nothing is broken.
[1] 20180602161151.apuhs2dygsexmcg2@treble
[2] [email protected]
[3] [email protected]
Miroslav Benes (3):
livepatch: Clear relocation targets on a module removal
livepatch: Unify functions for writing and clearing object relocations
livepatch: Clean up klp_update_object_relocations() return paths
arch/powerpc/kernel/module_64.c | 45 +++++++++++++++++++++++++
arch/s390/kernel/module.c | 8 +++++
arch/x86/kernel/module.c | 43 ++++++++++++++++++++++++
include/linux/moduleloader.h | 7 ++++
kernel/livepatch/core.c | 58 ++++++++++++++++++++++++---------
5 files changed, 146 insertions(+), 15 deletions(-)
--
2.23.0
On Thu, 5 Sep 2019, Miroslav Benes wrote:
> Updated version with Petr's feedback. It looks a bit different and
> better now (I would say). Not that it should be considered before we
> decide what to do with late module patching, but I finished it before
> the discussion started and someone could be interested.
>
> v1: http://lore.kernel.org/r/[email protected]
>
> Tested on x86_64, ppc64le and s390x. Cross-compiled on arm64 to verify
> that nothing is broken.
>
> [1] 20180602161151.apuhs2dygsexmcg2@treble
> [2] [email protected]
> [3] [email protected]
>
> Miroslav Benes (3):
> livepatch: Clear relocation targets on a module removal
> livepatch: Unify functions for writing and clearing object relocations
> livepatch: Clean up klp_update_object_relocations() return paths
>
> arch/powerpc/kernel/module_64.c | 45 +++++++++++++++++++++++++
> arch/s390/kernel/module.c | 8 +++++
> arch/x86/kernel/module.c | 43 ++++++++++++++++++++++++
> include/linux/moduleloader.h | 7 ++++
> kernel/livepatch/core.c | 58 ++++++++++++++++++++++++---------
> 5 files changed, 146 insertions(+), 15 deletions(-)
Ping.
If I remember correctly, we decided to have this as a temporary solution
before better late module patching is implemented. Feedback is welcome.
I'll then resend with arch maintainters CCed.
Thanks
Miroslav