[PATCH v2 0/2] arm64: modules: Reject loading of malformed modules

Adrian Barnaś
2025-09-22T13:04:53Z

Hi all,

Here is version two of the patches I previously posted here:

v1: https://lore.kernel.org/all/20250919122321.946462-1-abarnas@google.com/

Changes:
* Renamed the parameter `is_module` to `skip_dry_run` in scs_patch()
* Moved comments to module_finalize() and improve justification
* Instead of rejecting all modules with callback, reject those with cb
pointing outside core kernel text
* Replace -EPERM to -ENOEXEC when rejecting modules with incorrect cb
* Fix missing return in apply_alternatives_module() placeholder

Best regards
Adrian

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Dylan Hatch <dylanbhatch@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>

Adrian Barnaś (2):
arch: arm64: Fail module loading if dynamic SCS patching fails
arch: arm64: Reject modules with internal alternative callbacks

arch/arm64/include/asm/alternative.h | 7 +++++--
arch/arm64/include/asm/scs.h | 2 +-
arch/arm64/kernel/alternative.c | 19 ++++++++++++-------
arch/arm64/kernel/module.c | 21 +++++++++++++++++----
arch/arm64/kernel/pi/map_kernel.c | 2 +-
arch/arm64/kernel/pi/patch-scs.c | 10 ++++++----
arch/arm64/kernel/pi/pi.h | 2 +-
7 files changed, 43 insertions(+), 20 deletions(-)

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2.51.0.534.gc79095c0ca-goog