bpf: Add bpf_sys_close() helper.

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Add bpf_sys_close() helper to be used by the syscall/loader program to close
intermediate FDs and other cleanup.
Note this helper must never be allowed inside fdget/fdput bracketing.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210514003623.28033-11-alexei.starovoitov@gmail.com

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Alexei Starovoitov 2021-05-13 17:36:12 -07:00 • committed by Daniel Borkmann

parent 3d78417b60

commit 3abea08924

3 changed files with 33 additions and 0 deletions

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7

include/uapi/linux/bpf.h

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19

kernel/bpf/syscall.c

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7

tools/include/uapi/linux/bpf.h

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