tracing/histograms: Fix memory leak problem
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 v4.19.253 by commit eb622d5580b9e2ff694f62da6410618bd73853cb, it was introduced in version v4.19.149 by commit 240dd5118a9e0454f280ffeae63f22bd14735733. For more details please see the references link.