arm64: page-align sections for DEBUG_RODATA

A kernel built with DEBUG_RO_DATA && !CONFIG_DEBUG_ALIGN_RODATA doesn't
have .text aligned to a page boundary, though fixup_executable works at
page-granularity thanks to its use of create_mapping. If .text is not
page-aligned, the first page it exists in may be marked non-executable,
leading to failures when an attempt is made to execute code in said
page.

This patch upgrades ALIGN_DEBUG_RO and ALIGN_DEBUG_RO_MIN to force page
alignment for DEBUG_RO_DATA && !CONFIG_DEBUG_ALIGN_RODATA kernels,
ensuring that all sections with specific RWX permission requirements are
mapped with the correct permissions.

Signed-off-by: Mark Rutland <[email protected]>
Reported-by: Jeremy Linton <[email protected]>
Reviewed-by: Laura Abbott <[email protected]>
Acked-by: Ard Biesheuvel <[email protected]>
Cc: Suzuki Poulose <[email protected]>
Cc: Will Deacon <[email protected]>
Fixes: da141706aea52c1a ("arm64: add better page protections to arm64")
Cc: <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>

0 files changed, 0 insertions, 0 deletions