jerpelea opened a new pull request, #19158:
URL: https://github.com/apache/nuttx/pull/19158
## Summary
Adds tg_suid and tg_sgid fields to task_group_s to complete the POSIX
three-field identity model (real, effective, saved-set). Updates
group_inherit_identity() to propagate the new fields from parent to child task
group on task creation.
Fixes setuid(), setgid(), seteuid(), and setegid() to implement correct
POSIX privilege transition logic:
Root (euid==0): may set any value; all three IDs updated by setuid/setgid
Non-root: may only set effective ID to real or saved value; else EPERM
## Impact
RELEASE
## Testing
CI
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