usb: musb: sunxi: Fix accessing an released usb phy

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: usb: musb: sunxi: Fix accessing an released usb phy Commit 6ed05c68cbca ("usb: musb: sunxi: Explicitly release USB PHY on exit") will cause that usb phy @glue->xceiv is accessed after released. 1) register platform driver @sunxi_musb_driver // get the usb phy @glue->xceiv sunxi_musb_probe() -> devm_usb_get_phy(). 2) register and unregister platform driver @musb_driver musb_probe() -> sunxi_musb_init() use the phy here //the phy is released here musb_remove() -> sunxi_musb_exit() -> devm_usb_put_phy() 3) register @musb_driver again musb_probe() -> sunxi_musb_init() use the phy here but the phy has been released at 2). ... Fixed by reverting the commit, namely, removing devm_usb_put_phy() from sunxi_musb_exit().

References

• https://git.kernel.org/stable/c/721ddad945596220c123eb6f7126729fe277ee4f
• https://git.kernel.org/stable/c/4aa77d5ea9944468e16c3eed15e858fd5de44de1
• https://git.kernel.org/stable/c/6e2848d1c8c0139161e69ac0a94133e90e9988e8
• https://git.kernel.org/stable/c/63559ba8077cbadae1c92a65b73ea522bf377dd9
• https://git.kernel.org/stable/c/ccd811c304d2ee56189bfbc49302cb3c44361893
• https://git.kernel.org/stable/c/8a30da5aa9609663b3e05bcc91a916537f66a4cd
• https://git.kernel.org/stable/c/b08baa75b989cf779cbfa0969681f8ba2dc46569
• https://git.kernel.org/stable/c/498dbd9aea205db9da674994b74c7bf8e18448bd