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net/mlx5: Use struct_size() helper in kvzalloc()

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Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows that,
in the worse scenario, could lead to heap overflows.

Link: https://github.com/KSPP/linux/issues/160
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Gustavo A. R. Silva 2021-09-28 17:11:57 -05:00 committed by Saeed Mahameed
parent 806bf340e1
commit ab9ace3415
1 changed files with 1 additions and 2 deletions
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3
drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
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@ -497,8 +497,7 @@ static struct mlx5_fc_bulk *mlx5_fc_bulk_create(struct mlx5_core_dev *dev)
alloc_bitmask = MLX5_CAP_GEN(dev, flow_counter_bulk_alloc);
bulk_len = alloc_bitmask > 0 ? MLX5_FC_BULK_NUM_FCS(alloc_bitmask) : 1;
bulk = kvzalloc(sizeof(*bulk) + bulk_len * sizeof(struct mlx5_fc),
GFP_KERNEL);
bulk = kvzalloc(struct_size(bulk, fcs, bulk_len), GFP_KERNEL);
if (!bulk)
goto err_alloc_bulk;