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bpf: bpf_prog_array_copy() should return -ENOENT if exclude_prog not found

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This makes is it possible for bpf prog detach to return -ENOENT.

Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Sean Young
2018-05-27 12:24:08 +01:00
committed by Daniel Borkmann
parent 9ce64f192d
commit 170a7e3ea0
2 changed files with 11 additions and 2 deletions
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2
kernel/trace/bpf_trace.c
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@ -1006,6 +1006,8 @@ void perf_event_detach_bpf_prog(struct perf_event *event)
old_array = event->tp_event->prog_array;
ret = bpf_prog_array_copy(old_array, event->prog, NULL, &new_array);
if (ret == -ENOENT)
goto unlock;
if (ret < 0) {
bpf_prog_array_delete_safe(old_array, event->prog);
} else {