[PATCH v2 1/6] tracing/eprobe: Fix to release eprobe when failed to add dyn_event

[Masami Hiramatsu (Google)]

From: Masami Hiramatsu (Google) <mhira...@kernel.org>

Fix eprobe event to unregister event call and release eprobe when it fails
to add dynamic event correctly.

Fixes: 7491e2c44278 ("tracing: Add a probe that attaches to trace events")
Signed-off-by: Masami Hiramatsu (Google) <mhira...@kernel.org>
---
 kernel/trace/trace_eprobe.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c
index ebda68ee9abf..be8be0c1aaf0 100644
--- a/kernel/trace/trace_eprobe.c
+++ b/kernel/trace/trace_eprobe.c
@@ -963,6 +963,11 @@ static int __trace_eprobe_create(int argc, const char 
*argv[])
                goto error;
        }
        ret = dyn_event_add(&ep->devent, &ep->tp.event->call);
+       if (ret < 0) {
+               trace_probe_unregister_event_call(&ep->tp);
+               mutex_unlock(&event_mutex);
+               goto error;
+       }
        mutex_unlock(&event_mutex);
        return ret;
 parse_error: