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mlxsw: Annotate struct mlxsw_linecards 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_linecards.

[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/20230929180746.3005922-1-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kees Cook 2023-09-29 11:07:40 -07:00 committed by Jakub Kicinski
parent 6d6e40ec48
commit 0b7ed81833
1 changed files with 1 additions and 1 deletions
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drivers/net/ethernet/mellanox/mlxsw/core.h
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@ -624,7 +624,7 @@ struct mlxsw_linecards {
struct mlxsw_linecard_types_info *types_info;
struct list_head event_ops_list;
struct mutex event_ops_list_lock; /* Locks accesses to event ops list */
struct mlxsw_linecard linecards[];
struct mlxsw_linecard linecards[] __counted_by(count);
};
static inline struct mlxsw_linecard *