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Change History

In the Linux kernel, the following vulnerability has been resolved:

net: phy: micrel: always set shared->phydev for LAN8814

Currently, during the LAN8814 PTP probe shared->phydev is only set if PTP
clock gets actually set, otherwise the function will return before setting
it.

This is an issue as shared->phydev is unconditionally being used when IRQ
is being handled, especially in lan8814_gpio_process_cap and since it was
not set it will cause a NULL pointer exception and crash the kernel.

So, simply always set shared->phydev to avoid the NULL pointer exception.

https://git.kernel.org/stable/c/399d10934740ae8cdaa4e3245f7c5f6c332da844

https://git.kernel.org/stable/c/b093b06826b836c2824858669db080c190c04715

https://git.kernel.org/stable/c/da1ef8e9eb5d4a12bec32d11636e521e7d529b9e