linux-kernel - [PATCH 4.9 08/31] orangefs: fix memory leak of string new on exit path

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Message-Id: <20170416080222.235079692@linuxfoundation.org>
Date:   Sun, 16 Apr 2017 10:03:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Colin Ian King <colin.king@...onical.com>,
        Mike Marshall <hubcap@...ibond.com>,
        Martin Brandenburg <martin@...ibond.com>
Subject: [PATCH 4.9 08/31] orangefs: fix memory leak of string new on exit path

4.9-stable review patch.  If anyone has any objections, please let me know.

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

From: Colin Ian King <colin.king@...onical.com>

commit 4defb5f912a0ba60e07e91a4b62634814cd99b7f upstream.

allocates string 'new' is not free'd on the exit path when
cdm_element_count <= 0. Fix this by kfree'ing it.

Fixes CoverityScan CID#1375923 "Resource Leak"

Signed-off-by: Colin Ian King <colin.king@...onical.com>
Signed-off-by: Mike Marshall <hubcap@...ibond.com>
Signed-off-by: Martin Brandenburg <martin@...ibond.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/orangefs/orangefs-debugfs.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/orangefs/orangefs-debugfs.c
+++ b/fs/orangefs/orangefs-debugfs.c
@@ -671,8 +671,10 @@ int orangefs_prepare_debugfs_help_string
 		 */
 		cdm_element_count =
 			orangefs_prepare_cdm_array(client_debug_array_string);
-		if (cdm_element_count <= 0)
+		if (cdm_element_count <= 0) {
+			kfree(new);
 			goto out;
+		}
 
 		for (i = 0; i < cdm_element_count; i++) {
 			strlcat(new, "\t", string_size);