Messages in this thread | | | From | Toke Høiland-Jørgensen <> | Subject | Re: [PATCH bpf-next] samples/bpf: check detach prog exist or not in xdp_fwd | Date | Mon, 09 May 2022 11:46:20 +0200 |
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Zhengchao Shao <shaozhengchao@huawei.com> writes:
> Before detach the prog, we should check detach prog exist or not.
If we're adding such a check we should also check that it's the *right* program. I.e., query the ID for the program name and check that it matches what the program attached, then obtain an fd and pass that as XDP_EXPECTED_FD on detach to make sure it wasn't swapped out in the meantime...
-Toke
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