Linus,
Oleg Nesterov fixed a memory leak that happens if a user creates
a tracing instance, sets up a filter in an event, and then removes
that instance. The filter allocates memory that is never freed
when the instance is destroyed.
Please pull the latest trace-fixes-v3.16-rc5 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
trace-fixes-v3.16-rc5
Tag SHA1: 669ea50dfcff14f49119e15133c0b0eb32d1999a
Head SHA1: 2448e3493cb3874baa90725c87869455ebf11cd2
Oleg Nesterov (1):
tracing: instance_rmdir() leaks ftrace_event_file->filter
----
kernel/trace/trace_events.c | 1 +
1 file changed, 1 insertion(+)
---------------------------
commit 2448e3493cb3874baa90725c87869455ebf11cd2
Author: Oleg Nesterov <[email protected]>
Date: Fri Jul 11 21:06:38 2014 +0200
tracing: instance_rmdir() leaks ftrace_event_file->filter
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/[email protected]
Cc: Masami Hiramatsu <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Srikar Dronamraju <[email protected]>
Cc: Tom Zanussi <[email protected]>
Cc: "zhangwei(Jovi)" <[email protected]>
Cc: [email protected] # 3.11+
Fixes: f6a84bdc75b5 "tracing: Introduce remove_event_file_dir()"
Signed-off-by: Oleg Nesterov <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index f99e0b3bca8c..2de53628689f 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -470,6 +470,7 @@ 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);
}
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