bus: fsl-mc: Annotate fsl_mc_io.portal_virt_addr with __counted_by_ptr

The GCC and Clang compilers provide the __counted_by_ptr attribute,
which is used by KASAN and compiler bounds-checking to detect
out-of-bounds accesses to pointer fields.

In "struct fsl_mc_io", the "portal_virt_addr" pointer points to the MC
command portal virtual address. The size of this allocated portal in
bytes is tracked by the "portal_size" field within the same structure.

Annotate the "portal_virt_addr" pointer field with
"__counted_by_ptr(portal_size)" to enable compiler bounds-checking and
harden against potential out-of-bounds accesses.

Cc: codemender-patching+linux@google.com
Assisted-by: LLM
Signed-off-by: Bill Wendling <morbo@google.com>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20260922223538.2287676-1-morbo@google.com
Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>

0 files changed, 0 insertions, 0 deletions