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Message-ID: <20231113230051.58229-5-saeed@kernel.org> Date: Mon, 13 Nov 2023 15:00:41 -0800 From: Saeed Mahameed <saeed@...nel.org> To: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com> Cc: Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org, Tariq Toukan <tariqt@...dia.com>, Kees Cook <keescook@...omium.org>, Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org, Justin Stitt <justinstitt@...gle.com>, "Gustavo A . R . Silva" <gustavoars@...nel.org>, Leon Romanovsky <leonro@...dia.com> Subject: [net-next 04/14] net/mlx5: Annotate struct mlx5_fc_bulk with __counted_by From: Kees Cook <keescook@...omium.org> 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 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 mlx5_fc_bulk. Cc: Saeed Mahameed <saeedm@...dia.com> Cc: Leon Romanovsky <leon@...nel.org> Cc: "David S. Miller" <davem@...emloft.net> Cc: Eric Dumazet <edumazet@...gle.com> Cc: Jakub Kicinski <kuba@...nel.org> Cc: Paolo Abeni <pabeni@...hat.com> Cc: netdev@...r.kernel.org Cc: linux-rdma@...r.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <keescook@...omium.org> Reviewed-by: Justin Stitt <justinstitt@...gle.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org> Reviewed-by: Leon Romanovsky <leonro@...dia.com> Signed-off-by: Saeed Mahameed <saeedm@...dia.com> --- drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c index 17fe30a4c06c..0c26d707eed2 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c @@ -539,7 +539,7 @@ struct mlx5_fc_bulk { u32 base_id; int bulk_len; unsigned long *bitmask; - struct mlx5_fc fcs[]; + struct mlx5_fc fcs[] __counted_by(bulk_len); }; static void mlx5_fc_init(struct mlx5_fc *counter, struct mlx5_fc_bulk *bulk, -- 2.41.0
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