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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2020-09-25 19:49:13 +0300 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@nvidia.com> | 2020-10-01 07:26:31 +0300 |
| commit | ff7ea04ad579c1f5f5aed73d2d5dc13314d25c75 (patch) | |
| tree | 61e2957826d78530fe8e8aa6963c1ed79b02f46a /drivers | |
| parent | 7b2b16ee54cc08e268ddae59152cc99ec8275e1c (diff) | |
| download | linux-ff7ea04ad579c1f5f5aed73d2d5dc13314d25c75.tar.xz | |
net/mlx5e: Fix potential null pointer dereference
Calls to kzalloc() and kvzalloc() should be null-checked
in order to avoid any potential failures. In this case,
a potential null pointer dereference.
Fix this by adding null checks for _parse_attr_ and _flow_
right after allocation.
Addresses-Coverity-ID: 1497154 ("Dereference before null check")
Fixes: c620b772152b ("net/mlx5: Refactor tc flow attributes structure")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c index 186dc2961000..a0c356987e1a 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -4536,20 +4536,22 @@ mlx5e_alloc_flow(struct mlx5e_priv *priv, int attr_size, struct mlx5e_tc_flow_parse_attr *parse_attr; struct mlx5_flow_attr *attr; struct mlx5e_tc_flow *flow; - int out_index, err; + int err = -ENOMEM; + int out_index; flow = kzalloc(sizeof(*flow), GFP_KERNEL); parse_attr = kvzalloc(sizeof(*parse_attr), GFP_KERNEL); + if (!parse_attr || !flow) + goto err_free; flow->flags = flow_flags; flow->cookie = f->cookie; flow->priv = priv; attr = mlx5_alloc_flow_attr(get_flow_name_space(flow)); - if (!parse_attr || !flow || !attr) { - err = -ENOMEM; + if (!attr) goto err_free; - } + flow->attr = attr; for (out_index = 0; out_index < MLX5_MAX_FLOW_FWD_VPORTS; out_index++) |