linux-kernel - Re: kernel panic: n_tty: init

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Date:   Tue, 7 Nov 2017 17:18:35 +0000
From:   Alan Cox <gnomes@...rguk.ukuu.org.uk>
To:     Eric Biggers <ebiggers3@...il.com>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        syzbot 
        <bot+57840b4d2cc5c46981d5b9e07c9b7b06d5bcf064@...kaller.appspotmail.com>,
        jslaby@...e.com, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: kernel panic: n_tty: init_tty

> It's not just running at boot though.  It's also being hit by the fuzzer at
> runtime, via ptmx_open().

Then modify the routine to try N_NULL as a follow up (see
tty_ldisc_restore). N_NULL will never fail.

Alan