tracing: Fix wild-memory-access in registersynthevent()
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 v5.10.156 by commit 315b149f08229a233d47532eb5da1707b28f764c, it was introduced in version v4.17 by commit 4b147936fa509650beaf638b331573c23ba4d609. For more details please see the references link.