From 0b7ed8183375751ec018dd912643a85191cc2e27 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 29 Sep 2023 11:07:40 -0700 Subject: [PATCH] mlxsw: Annotate struct mlxsw_linecards 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_linecards. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Petr Machata Signed-off-by: Kees Cook Reviewed-by: Ido Schimmel Link: https://lore.kernel.org/r/20230929180746.3005922-1-keescook@chromium.org Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/mellanox/mlxsw/core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h index e5474d3e34db..c6bc5819ce43 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core.h +++ b/drivers/net/ethernet/mellanox/mlxsw/core.h @@ -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 *