linux-kernel - [065/118] fs/fscache/stats.c: fix memory leak

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Date:	Fri, 10 May 2013 14:39:41 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Anurup m" <anurup.m@...wei.com>,
	"David Howells" <dhowells@...hat.com>,
	"Sanil kumar" <sanil.kumar@...wei.com>,
	"shyju pv" <shyju.pv@...wei.com>,
	"Nataraj m" <nataraj.m@...wei.com>, "Li Zefan" <lizefan@...wei.com>
Subject: [065/118] fs/fscache/stats.c: fix memory leak

3.2.45-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Anurup m <anurup.m@...wei.com>

commit ec686c9239b4d472052a271c505d04dae84214cc upstream.

There is a kernel memory leak observed when the proc file
/proc/fs/fscache/stats is read.

The reason is that in fscache_stats_open, single_open is called and the
respective release function is not called during release.  Hence fix
with correct release function - single_release().

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=57101

Signed-off-by: Anurup m <anurup.m@...wei.com>
Cc: shyju pv <shyju.pv@...wei.com>
Cc: Sanil kumar <sanil.kumar@...wei.com>
Cc: Nataraj m <nataraj.m@...wei.com>
Cc: Li Zefan <lizefan@...wei.com>
Cc: David Howells <dhowells@...hat.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 fs/fscache/stats.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/fscache/stats.c
+++ b/fs/fscache/stats.c
@@ -276,5 +276,5 @@ const struct file_operations fscache_sta
 	.open		= fscache_stats_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release        = single_release,
 };

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