net/mlx5e: Skip restore TC rules for vport rep without loaded flag

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Skip restore TC rules for vport rep without loaded flag During driver unload, unregister_netdev is called after unloading vport rep. So, the mlx5e_rep_priv is already freed while trying to get rpriv->netdev, or walk rpriv->tc_ht, which results in use-after-free. So add the checking to make sure access the data of vport rep which is still loaded.

References

• https://git.kernel.org/stable/c/3e45dd1622a2c1a83c11bf42fdd8c1810123d6c0
• https://git.kernel.org/stable/c/47c78d3fc26e38ab805613a0f592dc8a820c7c64
• https://git.kernel.org/stable/c/5a03b368562a7ff5f5f1f63b5adf8309cbdbd5be