Refactor `cred_security_struct`, `find_task_by_vpid` and `strncpy_from_user_nofault`.#3299

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shadichy wants to merge 5 commits intotiann:mainfrom

shadichy:refactor

Commits on Mar 15, 2026

kernel: using scoped wrapper for `cred_security_struct`
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kernel: syscall_hook_manager: Use `pid_task(find_vpid(pid), PIDTYPE_PID)` in place of `find_task_by_vpid`
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Commits on Mar 16, 2026

kernel: Introduce __strncpy_from_user_nofault
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Commits on Mar 19, 2026

kernel: refactor `ksu_wrapper_setlease`
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Commits on Mar 20, 2026

kernel: pkg_observer: backport macro lower to 5.15 LTS
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