On Fri, Apr 16, 2021 at 08:32:20PM -0700, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <a...@kernel.org>
> 
> Add bpf_sys_close() helper to be used by the syscall/loader program to close
> intermediate FDs and other cleanup.

Conditional NAK.  In a lot of contexts close_fd() is very much unsafe.
In particular, anything that might call it between fdget() and fdput()
is Right Fucking Out(tm).

In which contexts can that thing be executed?

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