linux-kernel - Re: tty crash in tty_ldisc_receive

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Message-ID: <1491527002.4166.148.camel@kernel.crashing.org>
Date:   Fri, 07 Apr 2017 11:03:22 +1000
From:   Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:     Rob Herring <robh@...nel.org>, Michael Neuling <mikey@...ling.org>
Cc:     Al Viro <viro@...iv.linux.org.uk>, johan Hovold <johan@...nel.org>,
        Peter Hurley <peter@...leysoftware.com>,
        Wang YanQing <udknight@...il.com>,
        Alexander Popov <alex.popov@...ux.com>,
        Mikulas Patocka <mpatocka@...hat.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: tty crash in tty_ldisc_receive_buf()

On Thu, 2017-04-06 at 08:28 -0500, Rob Herring wrote:
> 
> Can you try this one [1].
> 
> Rob
> 
> [1] https://lkml.org/lkml/2017/3/23/569

Unless I missed something, that patch doesn't change barriers or
locking, so I don't see how it could fix anything ...

Mind you we haven't quite figured out exactly what's happening here.

Cheers,
Ben.