ecryptfs: Fix memory leakage in keystore.c

commit 3edc8376c06133e3386265a824869cad03a4efd4 upstream.

In 'decrypt_pki_encrypted_session_key' function:

Initializes 'payload' pointer and releases it on exit.

Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Rui Xiang <rui.xiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 2333203a120b3b853f71ef011a0755a3be04fd6a..d28fc348afe7831fdfb47b4b7c53ab4f28255fc6 100644 (file)
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1149,7 +1149,7 @@ decrypt_pki_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
        struct ecryptfs_msg_ctx *msg_ctx;
        struct ecryptfs_message *msg = NULL;
        char *auth_tok_sig;
-       char *payload;
+       char *payload = NULL;
        size_t payload_len;
        int rc;
 
@@ -1204,6 +1204,7 @@ decrypt_pki_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
 out:
        if (msg)
                kfree(msg);
+       kfree(payload);
        return rc;
 }