[tip:tracing/urgent] tracing/filters: free filter_string in destroy_preds()

[tip-bot for Li Zefan <lizf@cn.fujitsu.com>]

Commit-ID:  57be88878e7aa38750384704d811485a607bbda4
Gitweb:     http://git.kernel.org/tip/57be88878e7aa38750384704d811485a607bbda4
Author:     Li Zefan <lizf@cn.fujitsu.com>
AuthorDate: Tue, 16 Jun 2009 16:39:12 +0800
Committer:  Steven Rostedt <rostedt@goodmis.org>
CommitDate: Tue, 16 Jun 2009 16:25:35 -0400

tracing/filters: free filter_string in destroy_preds()

filter->filter_string is not freed when unloading a module:

 # insmod trace-events-sample.ko
 # echo "bar < 100" > /mnt/tracing/events/sample/foo_bar/filter
 # rmmod trace-events-sample.ko

[ Impact: fix memory leak when unloading module ]

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4A375A30.9060802@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>


---
 kernel/trace/trace_events_filter.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index b24ab0e..d9f01c1 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -381,6 +381,7 @@ void destroy_preds(struct ftrace_event_call *call)
 			filter_free_pred(filter->preds[i]);
 	}
 	kfree(filter->preds);
+	kfree(filter->filter_string);
 	kfree(filter);
 	call->filter = NULL;
 }