linux-kernel - [PATCH 4/4] tools lib traceevent: Fix memory leak in pretty

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Date:	Wed, 23 Apr 2014 13:31:22 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	stable@...r.kernel.org.#.3.14+, Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 4/4] tools lib traceevent: Fix memory leak in pretty_print()

From: Steven Rostedt <rostedt@...dmis.org>

Commit 12e55569a244 "tools lib traceevent: Use helper trace-seq in print
functions like kernel does" added a extra trace_seq helper to process
string arguments like the kernel does it. But the difference between the
kernel and the userspace library is that the kernel's trace_seq structure
has a static allocated buffer. The userspace one has a dynamically
allocated one. It requires a trace_seq_destroy(), otherwise it produces
a nasty memory leak.

Cc: stable@...r.kernel.org # 3.14+
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
Link: http://lkml.kernel.org/r/20140422192330.6bb09bf8@gandalf.local.home
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
---
 tools/lib/traceevent/event-parse.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index baec7d8..b83184f 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -4344,6 +4344,7 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
 					      format, len_arg, arg);
 				trace_seq_terminate(&p);
 				trace_seq_puts(s, p.buffer);
+				trace_seq_destroy(&p);
 				arg = arg->next;
 				break;
 			default:
-- 
1.8.3.1

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