A potential scenario, when an error is returned after add_uprobe_event_legacy() in perf_event_uprobe_open_legacy(), or bpf_program__attach_perf_event_opts() in bpf_program__attach_uprobe_opts() returns an error, the uprobe_event that was previously created is not cleaned. At the same time, the legacy kprobe_event also have similar problems. With these patches, whenever an error is returned, it ensures that the created kprobe_event/uprobe_event is cleaned. V1 -> v3: - add detail commits - call remove_kprobe_event_legacy() on failed bpf_program__attach_perf_event_opts() v3 -> v4: - cleanup the legacy kprobe_event on failed add/attach_event Chuang Wang (3): libbpf: cleanup the legacy kprobe_event on failed add/attach_event() libbpf: fix wrong variable used in perf_event_uprobe_open_legacy() libbpf: cleanup the legacy uprobe_event on failed add/attach_event() tools/lib/bpf/libbpf.c | 37 +++++++++++++++++++++++++++++-------- 1 file changed, 29 insertions(+), 8 deletions(-) -- 2.34.1
