linux-kernel - [patch] latency_hist: fix small memory leak

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Date:	Mon, 22 Feb 2010 16:27:43 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	rt-users <linux-rt-users@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Carsten Emde <ce@...g.ch>,
	Clark Williams <williams@...hat.com>,
	Frank Rowand <frank.rowand@...sony.com>,
	Robin Gareus <robin@...eus.org>,
	Gregory Haskins <ghaskins@...ell.com>,
	Philippe Reynes <philippe.reynes@...smpp.fr>,
	Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>,
	Will Schmidt <will_schmidt@...t.ibm.com>,
	Darren Hart <dvhltc@...ibm.com>, Jan Blunck <jblunck@...e.de>,
	Sven-Thorsten Dietrich <sdietrich@...ell.com>,
	Jon Masters <jcm@...hat.com>,
	Mark Knecht <markknecht@...il.com>,
	John Kacur <jkacur@...hat.com>,
	Nick Piggin <nickpiggin@...oo.com.au>
Subject: [patch] latency_hist: fix small memory leak

index_ptr needs to be freed on the error path.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/kernel/trace/latency_hist.c b/kernel/trace/latency_hist.c
index b3b5ea2..8edc70c 100644
--- a/kernel/trace/latency_hist.c
+++ b/kernel/trace/latency_hist.c
@@ -204,8 +204,10 @@ static void *l_start(struct seq_file *m, loff_t *pos)
 			   , my_hist->beyond_hist_bound_samples
 			   , MAX_ENTRY_NUM, "samples");
 	}
-	if (index >= MAX_ENTRY_NUM)
+	if (index >= MAX_ENTRY_NUM) {
+		kfree(index_ptr);
 		return NULL;
+	}
 
 	*index_ptr = index;
 	return index_ptr;
--
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