The splice()
and vmsplice()
system calls are meant to improve performance for certain data-movement
tasks by minimizing (or avoiding altogether) system calls and the copying
of data.  They also have a long history of security problems.  The recent
flood of LLM-discovered vulnerabilities has drawn attention, once again, to
splice() and vmsplice(); as a result, they may end up
being removed altogether.

https://lwn.net/Articles/1075838/
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