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mlxsw: spectrum_span: Annotate struct mlxsw_sp_span with __counted_by

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Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

As found with Coccinelle[1], add __counted_by for struct mlxsw_sp_span.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Petr Machata <petrm@nvidia.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/20230929180746.3005922-5-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kees Cook 2023-09-29 11:07:44 -07:00 committed by Jakub Kicinski
parent 4d3a42ec5c
commit 18cee9da32
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
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@ -31,7 +31,7 @@ struct mlxsw_sp_span {
refcount_t policer_id_base_ref_count;
atomic_t active_entries_count;
int entries_count;
struct mlxsw_sp_span_entry entries[];
struct mlxsw_sp_span_entry entries[] __counted_by(entries_count);
};
struct mlxsw_sp_span_analyzed_port {