[PATCH] tracing/kprobe: Release kprobe print_fmt properly

[Jiri Olsa]

We don't release tk->tp.call.print_fmt when destroying
local uprobe. Also there's missing print_fmt kfree in
create_local_trace_kprobe error path.

Fixes: e12f03d7031a ("perf/core: Implement the 'perf_kprobe' PMU")
Signed-off-by: Jiri Olsa <jo...@kernel.org>
---
 kernel/trace/trace_kprobe.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index daa81571b22a..21f718472942 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1480,8 +1480,10 @@ create_local_trace_kprobe(char *func, void *addr, 
unsigned long offs,
        }
 
        ret = __register_trace_kprobe(tk);
-       if (ret < 0)
+       if (ret < 0) {
+               kfree(tk->tp.call.print_fmt);
                goto error;
+       }
 
        return &tk->tp.call;
 error:
@@ -1501,6 +1503,8 @@ void destroy_local_trace_kprobe(struct trace_event_call 
*event_call)
        }
 
        __unregister_trace_kprobe(tk);
+
+       kfree(tk->tp.call.print_fmt);
        free_trace_kprobe(tk);
 }
 #endif /* CONFIG_PERF_EVENTS */
-- 
2.17.1