tracing: Fix memory leak in tracingreadpipe()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.80 by commit 2c21ee020ce43d744ecd7f3e9bddfcaafef270ce, it was introduced in version v5.12 by commit efbbdaa22bb78761bff8dfdde027ad04bedd47ce. For more details please see the references link.