CVE-2025-68376 coresight: ETR: Fix ETR buffer use-after-free issue

In the Linux kernel, the following vulnerability has been resolved: coresight: ETR: Fix ETR buffer use-after-free issue When ETR is enabled as CSMODESYSFS, if the buffer size is changed and enabled again, currently sysfsbuf will point to the newly allocated memorybufnew and free the old...