linux-kernel - Re: [PATCH 0/6] virtio-console: spec compliance fixes

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Date:   Tue, 24 Apr 2018 21:41:29 +0300
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Amit Shah <amit@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        virtualization@...ts.linux-foundation.org, stable@...r.kernel.org,
        Tiwei Bie <tiwei.bie@...el.com>,
        Jason Wang <jasowang@...hat.com>
Subject: Re: [PATCH 0/6] virtio-console: spec compliance fixes

On Fri, Apr 20, 2018 at 09:17:59PM +0300, Michael S. Tsirkin wrote:
> Turns out virtio console tries to take a buffer out of an active vq.
> Works by sheer luck, and is explicitly forbidden by spec.  And while
> going over it I saw that error handling is also broken -
> failure is easy to trigger if I force allocations to fail.
> 
> Lightly tested.

Amit - any feedback before I push these patches?

> Michael S. Tsirkin (6):
>   virtio_console: don't tie bufs to a vq
>   virtio: add ability to iterate over vqs
>   virtio_console: free buffers after reset
>   virtio_console: drop custom control queue cleanup
>   virtio_console: move removal code
>   virtio_console: reset on out of memory
> 
>  drivers/char/virtio_console.c | 155 ++++++++++++++++++++----------------------
>  include/linux/virtio.h        |   3 +
>  2 files changed, 75 insertions(+), 83 deletions(-)
> 
> -- 
> MST
>