net: usb: asix_devices: add phy_mask for ax88772 mdio bus

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: asix_devices: add phy_mask for ax88772 mdio bus Without setting phy_mask for ax88772 mdio bus, current driver may create at most 32 mdio phy devices with phy address range from 0x00 ~ 0x1f. DLink DUB-E100 H/W Ver B1 is such a device. However, only one main phy device will bind to net phy driver. This is creating issue during system suspend/resume since phy_polling_mode() in phy_state_machine() will directly deference member of phydev->drv for non-main phy devices. Then NULL pointer dereference issue will occur. Due to only external phy or internal phy is necessary, add phy_mask for ax88772 mdio bus to workarnoud the issue.

References

• https://git.kernel.org/stable/c/75947d3200de98a9ded9ad8972e02f1a177097fe
• https://git.kernel.org/stable/c/59ed6fbdb1bc03316e09493ffde7066f031c7524
• https://git.kernel.org/stable/c/ccef5ee4adf56472aa26bdd1f821a6d0cd06089a
• https://git.kernel.org/stable/c/ee2cd40b0bb46056949a2319084a729d95389386
• https://git.kernel.org/stable/c/a754ab53993b1585132e871c5d811167ad3c52ff
• https://git.kernel.org/stable/c/ad1f8313aeec0115f9978bd2d002ef4a8d96c773
• https://git.kernel.org/stable/c/4faff70959d51078f9ee8372f8cff0d7045e4114