[PATCH 4.19 07/97] ecryptfs: fix a memory leak bug in ecryptfs_init_messaging()

Greg Kroah-Hartman
2020-02-27T14:03:25Z

From: Wenwen Wang <wenwen@cs.uga.edu>

commit b4a81b87a4cfe2bb26a4a943b748d96a43ef20e8 upstream.

In ecryptfs_init_messaging(), if the allocation for 'ecryptfs_msg_ctx_arr'
fails, the previously allocated 'ecryptfs_daemon_hash' is not deallocated,
leading to a memory leak bug. To fix this issue, free
'ecryptfs_daemon_hash' before returning the error.

Cc: stable@vger.kernel.org
Fixes: 88b4a07e6610 ("[PATCH] eCryptfs: Public key transport mechanism")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/ecryptfs/messaging.c | 1 +
1 file changed, 1 insertion(+)

--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -392,6 +392,7 @@ int __init ecryptfs_init_messaging(void)
* ecryptfs_message_buf_len),
GFP_KERNEL);
if (!ecryptfs_msg_ctx_arr) {
+ kfree(ecryptfs_daemon_hash);
rc = -ENOMEM;
goto out;
}