net: fec: Better handle pm_runtime_get() failing in .remove()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net: fec: Better handle pm_runtime_get() failing in .remove() In the (unlikely) event that pm_runtime_get() (disguised as pm_runtime_resume_and_get()) fails, the remove callback returned an error early. The problem with this is that the driver core ignores the error value and continues removing the device. This results in a resource leak. Worse the devm allocated resources are freed and so if a callback of the driver is called later the register mapping is already gone which probably results in a crash.

References

• https://git.kernel.org/stable/c/d52a0cca591e899d4e5c8ab19e067b4c6b7d104f
• https://git.kernel.org/stable/c/be85912c36ddca3e8b2eef1b5392cd8db6bdb730
• https://git.kernel.org/stable/c/b22b514209ff8c4287abb853399890ab97e1b5ca
• https://git.kernel.org/stable/c/83996d317b1deddc85006376082e8886f55aa709
• https://git.kernel.org/stable/c/c1bc2870f14e526a01897e14c747a0a0ca125231
• https://git.kernel.org/stable/c/9407454a9b18bbeff216e8ecde87ffb2171e9ccf
• https://git.kernel.org/stable/c/e02d8d5b1602689b98d9b91550a11b9b57baedbe
• https://git.kernel.org/stable/c/f816b9829b19394d318e01953aa3b2721bca040d