On Tue, Feb 18, 2025 at 06:02:00PM +0800, Haoxiang Li wrote:
> Add check for the return value of get_macsec_device() in
> mlx5r_del_gid_macsec_operations() to prevent null pointer
> dereference.
>
> Fixes: 58dbd6428a68 ("RDMA/mlx5: Handles RoCE MACsec steering rules addition and deletion")
> Cc: stable@xxxxxxxxxxxxxxx
Definitely not.
> Signed-off-by: Haoxiang Li <haoxiang_li2024@xxxxxxx>
> ---
> drivers/infiniband/hw/mlx5/macsec.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/infiniband/hw/mlx5/macsec.c b/drivers/infiniband/hw/mlx5/macsec.c
> index 3c56eb5eddf3..623b0a58f721 100644
> --- a/drivers/infiniband/hw/mlx5/macsec.c
> +++ b/drivers/infiniband/hw/mlx5/macsec.c
> @@ -354,6 +354,11 @@ void mlx5r_del_gid_macsec_operations(const struct ib_gid_attr *attr)
> }
> }
> macsec_device = get_macsec_device(ndev, &dev->macsec.macsec_devices_list);
At this stage macsec_device is valid.
> + if (!macsec_device) {
> + dev_put(ndev);
> + mutex_unlock(&dev->macsec.lock);
> + return;
> + }
> mlx5_macsec_del_roce_rule(attr->index, dev->mdev->macsec_fs,
> &macsec_device->tx_rules_list, &macsec_device->rx_rules_list);
> mlx5_macsec_del_roce_gid(macsec_device, attr->index);
> --
> 2.25.1
>
