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Message-Id: <20230111053045.413133-14-saeed@kernel.org>
Date: Tue, 10 Jan 2023 21:30:43 -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>,
"Gustavo A. R. Silva" <gustavoars@...nel.org>,
linux-rdma@...r.kernel.org, Jiri Pirko <jiri@...dia.com>
Subject: [net-next 13/15] net/mlx5e: Replace 0-length array with flexible array
From: Kees Cook <keescook@...omium.org>
Zero-length arrays are deprecated[1]. Replace struct mlx5e_rx_wqe_cyc's
"data" 0-length array with a flexible array. Detected with GCC 13,
using -fstrict-flex-arrays=3:
drivers/net/ethernet/mellanox/mlx5/core/en_main.c: In function 'mlx5e_alloc_rq':
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:827:42: warning: array subscript f is outside array bounds of 'struct mlx5_wqe_data_seg[0]' [-Warray-bounds=]
827 | wqe->data[f].byte_count = 0;
| ~~~~~~~~~^~~
In file included from drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.h:11,
from drivers/net/ethernet/mellanox/mlx5/core/eswitch.h:48,
from drivers/net/ethernet/mellanox/mlx5/core/en_main.c:42:
drivers/net/ethernet/mellanox/mlx5/core/en.h:250:39: note: while referencing 'data'
250 | struct mlx5_wqe_data_seg data[0];
| ^~~~
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays
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: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: netdev@...r.kernel.org
Cc: linux-rdma@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org>
Reviewed-by: Jiri Pirko <jiri@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 7cbd71f0b8ae..82573ac722d1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -247,7 +247,7 @@ struct mlx5e_rx_wqe_ll {
};
struct mlx5e_rx_wqe_cyc {
- struct mlx5_wqe_data_seg data[0];
+ DECLARE_FLEX_ARRAY(struct mlx5_wqe_data_seg, data);
};
struct mlx5e_umr_wqe {
--
2.39.0
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