Re: [PATCH bpf-next 11/15] bpf: Add bpf_sys_close() helper.
From: Al Viro <viro@zeniv.linux.org.uk>
Date: 2021-04-17 03:42:29
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bpf
On Fri, Apr 16, 2021 at 08:32:20PM -0700, Alexei Starovoitov wrote:
From: Alexei Starovoitov <ast@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?