tty: ttybuffer: Fix the softlockup issue in flushto_ldisc
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 v4.9.291 by commit b1ffc16ec05ae40d82b6e373322d62e9d6b54fbc. For more details please see the references link.