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net/mlx5e: fix a double-free in arfs_create_groups

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When `in` allocated by kvzalloc fails, arfs_create_groups will free
ft->g and return an error. However, arfs_create_table, the only caller of
arfs_create_groups, will hold this error and call to
mlx5e_destroy_flow_table, in which the ft->g will be freed again.

Fixes: 1cabe6b096 ("net/mlx5e: Create aRFS flow tables")
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Zhipeng Lu 2024-01-17 15:17:36 +08:00 committed by Saeed Mahameed
parent 315a597f9b
commit 3c6d518924
1 changed files with 15 additions and 11 deletions
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26
drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
View file

@ -254,11 +254,13 @@ static int arfs_create_groups(struct mlx5e_flow_table *ft,
ft->g = kcalloc(MLX5E_ARFS_NUM_GROUPS,
sizeof(*ft->g), GFP_KERNEL);
in = kvzalloc(inlen, GFP_KERNEL);
if (!in || !ft->g) {
kfree(ft->g);
kvfree(in);
if (!ft->g)
return -ENOMEM;
in = kvzalloc(inlen, GFP_KERNEL);
if (!in) {
err = -ENOMEM;
goto err_free_g;
}
mc = MLX5_ADDR_OF(create_flow_group_in, in, match_criteria);
@ -278,7 +280,7 @@ static int arfs_create_groups(struct mlx5e_flow_table *ft,
break;
default:
err = -EINVAL;
goto out;
goto err_free_in;
}
switch (type) {
@ -300,7 +302,7 @@ static int arfs_create_groups(struct mlx5e_flow_table *ft,
break;
default:
err = -EINVAL;
goto out;
goto err_free_in;
}
MLX5_SET_CFG(in, match_criteria_enable, MLX5_MATCH_OUTER_HEADERS);
@ -309,7 +311,7 @@ static int arfs_create_groups(struct mlx5e_flow_table *ft,
MLX5_SET_CFG(in, end_flow_index, ix - 1);
ft->g[ft->num_groups] = mlx5_create_flow_group(ft->t, in);
if (IS_ERR(ft->g[ft->num_groups]))
goto err;
goto err_clean_group;
ft->num_groups++;
memset(in, 0, inlen);
@ -318,18 +320,20 @@ static int arfs_create_groups(struct mlx5e_flow_table *ft,
MLX5_SET_CFG(in, end_flow_index, ix - 1);
ft->g[ft->num_groups] = mlx5_create_flow_group(ft->t, in);
if (IS_ERR(ft->g[ft->num_groups]))
goto err;
goto err_clean_group;
ft->num_groups++;
kvfree(in);
return 0;
err:
err_clean_group:
err = PTR_ERR(ft->g[ft->num_groups]);
ft->g[ft->num_groups] = NULL;
out:
err_free_in:
kvfree(in);
err_free_g:
kfree(ft->g);
ft->g = NULL;
return err;
}