Commit c63da7d6 authored by Kees Cook's avatar Kees Cook Committed by Jakub Kicinski

mlxsw: core: Annotate struct mlxsw_env with __counted_by

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_env.

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

Cc: Petr Machata <petrm@nvidia.com>
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Reviewed-by: default avatarIdo Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/20230929180746.3005922-2-keescook@chromium.orgSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 0b7ed818
......@@ -34,7 +34,7 @@ struct mlxsw_env {
u8 num_of_slots; /* Including the main board. */
u8 max_eeprom_len; /* Maximum module EEPROM transaction length. */
struct mutex line_cards_lock; /* Protects line cards. */
struct mlxsw_env_line_card *line_cards[];
struct mlxsw_env_line_card *line_cards[] __counted_by(num_of_slots);
};
static bool __mlxsw_env_linecard_is_active(struct mlxsw_env *mlxsw_env,
......
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