Re: [PATCH] tracing: hist: free the var ref when its initialization fails

Sashiko wrote:

- [High] Pre-existing memory leak in `__destroy_hist_field()` for variable
references (`VAR_REF` fields) reused three or more times within a histogram
trigger.

That is the bug fixed by the patch linked in this one's notes:

  https://lore.kernel.org/linux-trace-kernel/20260906124025.3550596-1-donggeunyoo.kernel@gmail.com/ (local)

It removes the reference count so __destroy_hist_field() frees
unconditionally, and the three-reference case no longer leaks. The two
patches are independent and apply in either order.