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 v5.10.163 by commit 0cb31bd88361edb96cfc622648717ba348f0f4dc, it was introduced in version v5.6 by commit d380dcde9a07ca5de4805dee11f58a98ec0ad6ff. For more details please see the references link.