[PATCH 4.9 20/61] tty: Dont call panic() at tty_ldisc_init()

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Tetsuo Handa commit 903f9db10f18f735e62ba447147b6c434b6af003 upstream. syzbot is reporting kernel panic [1] triggered by memory allocation failure at

[PATCH 4.9 20/61] tty: Dont call panic() at tty_ldisc_init()

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Tetsuo Handa commit 903f9db10f18f735e62ba447147b6c434b6af003 upstream. syzbot is reporting kernel panic [1] triggered by memory allocation failure at tty_ldisc_get() from tty_ldisc_init(). But