netsched: fix NULL deref in fifoset_limit()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.14.251 by commit 26af64d71b6277841285fa40e3f7164a378dfda9, it was introduced in version v2.6.27 by commit fb0305ce1b03f6ff17f84f2c63daccecb45f2805. For more details please see the references link.