tracing/kprobes: unregister_trace_probe needs to be called under mutex

[sfrench/cifs-2.6.git] / kernel / trace / trace_kprobe.c

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 1b79d1c15726b03f6a0abfe55b340c7cd9860767..8b27c9849b427905ea9a5ef83864a88526afe405 100644 (file)
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -925,14 +925,17 @@ static int create_trace_probe(int argc, char **argv)
                        pr_info("Delete command needs an event name.\n");
                        return -EINVAL;
                }
+               mutex_lock(&probe_lock);
                tp = find_probe_event(event, group);
                if (!tp) {
+                       mutex_unlock(&probe_lock);
                        pr_info("Event %s/%s doesn't exist.\n", group, event);
                        return -ENOENT;
                }
                /* delete an event */
                unregister_trace_probe(tp);
                free_trace_probe(tp);
+               mutex_unlock(&probe_lock);
                return 0;
        }