There is a new pull request by tanpsi against master on the void-packages repository

https://github.com/tanpsi/void-packages util-linux-su
https://github.com/void-linux/void-packages/pull/50686

util-linux: backport fix for su(1)
<!-- Uncomment relevant sections and delete options which are not applicable -->

#### Testing the changes
- I tested the changes in this PR: **YES**

<!--
#### New package
- This new package conforms to the [package requirements](https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#package-requirements): **YES**|**NO**
-->

<!-- Note: If the build is likely to take more than 2 hours, please add ci skip tag as described in
https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#continuous-integration
and test at least one native build and, if supported, at least one cross build.
Ignore this section if this PR is not skipping CI.
-->
#### Local build testing
- I built this PR locally for my native architecture, (x86_64-glibc)
<br>

This is a backport for the [upstream fix](https://github.com/util-linux/util-linux/commit/4b2e6f5071a4c5beebbd9668d24dc05defc096d7). It was suggested by @classabbyamp at #50538

A patch file from https://github.com/void-linux/void-packages/pull/50686.patch is attached