libbpf: Use probe_name for legacy kprobe

Fix a bug in commit 46ed5fc33db9, which wrongly used the
func_name instead of probe_name to register legacy kprobe.

Fixes: 46ed5fc33db9 ("libbpf: Refactor and simplify legacy kprobe code")
Co-developed-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Qiang Wang <wangqiang.wq.frank@bytedance.com>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Tested-by: Hengqi Chen <hengqi.chen@gmail.com>
Reviewed-by: Hengqi Chen <hengqi.chen@gmail.com>
Link: https://lore.kernel.org/bpf/20211227130713.66933-1-wangqiang.wq.frank@bytedance.com

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 1d02ba7f11b44e51f6ef287ec7addaef4da40bca..26e49e6aa5b1579323fa110e10a638826c348241 100644 (file)
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -10017,7 +10017,7 @@ bpf_program__attach_kprobe_opts(const struct bpf_program *prog,
                gen_kprobe_legacy_event_name(probe_name, sizeof(probe_name),
                                             func_name, offset);
 
-               legacy_probe = strdup(func_name);
+               legacy_probe = strdup(probe_name);
                if (!legacy_probe)
                        return libbpf_err_ptr(-ENOMEM);