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selftests/hid: add test for attaching multiple time the same struct_ops

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Turns out that we would en up in a bad state if we attempt to attach
twice the same HID-BPF struct_ops, so have a test for it.

Link: https://patch.msgid.link/20240723-fix-6-11-bpf-v1-4-b9d770346784@kernel.org
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
This commit is contained in:
Benjamin Tissoires 2024-07-23 18:21:54 +02:00
parent acd34cfc48
commit facdbdfe0e
1 changed files with 18 additions and 0 deletions
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18
tools/testing/selftests/hid/hid_bpf.c
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@ -694,6 +694,24 @@ TEST_F(hid_bpf, subprog_raw_event)
ASSERT_EQ(buf[2], 52);
}
/*
* Attach hid_first_event to the given uhid device,
* attempt at re-attaching it, we should not lock and
* return an invalid struct bpf_link
*/
TEST_F(hid_bpf, multiple_attach)
{
const struct test_program progs[] = {
{ .name = "hid_first_event" },
};
struct bpf_link *link;
LOAD_PROGRAMS(progs);
link = bpf_map__attach_struct_ops(self->skel->maps.first_event);
ASSERT_NULL(link) TH_LOG("unexpected return value when re-attaching the struct_ops");
}
/*
* Ensures that we can attach/detach programs
*/