tracing/hist: Fix out-of-bound write on 'action_data.var_ref_idx'
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 v6.0.18 by commit b4efdc219fb8cfa066c7042e636ab8ad6d7e7494, it was introduced in version v5.6 by commit d380dcde9a07ca5de4805dee11f58a98ec0ad6ff. For more details please see the references link.