Cleanup missing frees on some ioctls

commit 24df1483 upstream.

Cleanup some missing mem frees on some cifs ioctls, and
clarify others to make more obvious that no data is returned.
Signed-off-by: Steve French <smfrench@gmail.com>
Acked-by: Sachin Prabhu <sprabhu@redhat.com>
[bwh: Backported to 3.16:
 - Drop changes to smb2_duplicate_extents(), smb3_set_integrity()
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

fs/cifs/smb2ops.c

@@ -228,7 +228,7 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 			le64_to_cpu(out_buf->LinkSpeed));
 	} else
 		cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
-
+	kfree(out_buf);
 	return rc;
 }
 #endif /* STATS2 */
@@ -640,6 +640,7 @@ smb2_clone_range(const unsigned int xid,
 
 cchunk_out:
 	kfree(pcchunk);
+	kfree(retbuf);
 	return rc;
 }