linux-kernel - Re: [PATCH 13/18] virtiofs: Do not access virtqueue in request submission path

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Message-ID: <20190906115241.GU5900@stefanha-x1.localdomain>
Date:   Fri, 6 Sep 2019 12:52:41 +0100
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     Vivek Goyal <vgoyal@...hat.com>
Cc:     linux-fsdevel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, miklos@...redi.hu,
        linux-kernel@...r.kernel.org, virtio-fs@...hat.com,
        dgilbert@...hat.com, mst@...hat.com
Subject: Re: [PATCH 13/18] virtiofs: Do not access virtqueue in request
 submission path

On Thu, Sep 05, 2019 at 03:48:54PM -0400, Vivek Goyal wrote:
> In request submission path it is possible that virtqueue is already gone
> due to driver->remove(). So do not access it in dev_dbg(). Use pr_debug()
> instead.
> 
> If virtuqueue is gone, this will result in NULL pointer deference.
> 
> Signed-off-by: Vivek Goyal <vgoyal@...hat.com>
> ---
>  fs/fuse/virtio_fs.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@...hat.com>

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