CVE-2021-47205

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> clk: sunxi-ng: Unregister clocks/resets when unbinding<br /> <br /> Currently, unbinding a CCU driver unmaps the device&amp;#39;s MMIO region, while<br /> leaving its clocks/resets and their providers registered. This can cause<br /> a page fault later when some clock operation tries to perform MMIO. Fix<br /> this by separating the CCU initialization from the memory allocation,<br /> and then using a devres callback to unregister the clocks and resets.<br /> <br /> This also fixes a memory leak of the `struct ccu_reset`, and uses the<br /> correct owner (the specific platform driver) for the clocks and resets.<br /> <br /> Early OF clock providers are never unregistered, and limited error<br /> handling is possible, so they are mostly unchanged. The error reporting<br /> is made more consistent by moving the message inside of_sunxi_ccu_probe.