From: Oleg Nesterov <oleg@redhat.com>
Date: Fri, 11 Jul 2014 19:06:38 +0000 (+0200)
Subject: tracing: instance_rmdir() leaks ftrace_event_file->filter
X-Git-Tag: submit/tizen/20160422.055611~1^2~99^2~18^2~805
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=86fb4c8cc75ef7c1c9805bedf01b6a57d3d624aa;p=sdk%2Femulator%2Femulator-kernel.git

tracing: instance_rmdir() leaks ftrace_event_file->filter

commit 2448e3493cb3874baa90725c87869455ebf11cd2 upstream.

instance_rmdir() path destroys the event files but forgets to free
file->filter. Change remove_event_file_dir() to free_event_filter().

Link: http://lkml.kernel.org/p/20140711190638.GA19517@redhat.com

Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: "zhangwei(Jovi)" <jovi.zhangwei@huawei.com>
Fixes: f6a84bdc75b5 "tracing: Introduce remove_event_file_dir()"
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 7b16d40bd64d..e4c4efc4ba0d 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -439,6 +439,7 @@ static void remove_event_file_dir(struct ftrace_event_file *file)
 
 	list_del(&file->list);
 	remove_subsystem(file->system);
+	free_event_filter(file->filter);
 	kmem_cache_free(file_cachep, file);
 }