linux-kernel - Re: [PATCH 4.4 38/49] xen-netfront: Improve error handling during initialization

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Message-ID: <20171209170458.GD27604@kroah.com>
Date:   Sat, 9 Dec 2017 18:04:58 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Ben Hutchings <ben.hutchings@...ethink.co.uk>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Ross Lagerwall <ross.lagerwall@...rix.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: Re: [PATCH 4.4 38/49] xen-netfront: Improve error handling during
 initialization

On Fri, Dec 08, 2017 at 05:10:49AM +0000, Ben Hutchings wrote:
> On Thu, 2017-12-07 at 14:07 +0100, Greg Kroah-Hartman wrote:
> > 4.4-stable review patch.  If anyone has any objections, please let me
> > know.
> > 
> > ------------------
> > 
> > From: Ross Lagerwall <ross.lagerwall@...rix.com>
> > 
> > 
> > [ Upstream commit e2e004acc7cbe3c531e752a270a74e95cde3ea48 ]
> [...]
> > @@ -1950,9 +1942,10 @@ abort_transaction_no_dev_fatal:
> >  	xenbus_transaction_end(xbt, 1);
> >   destroy_ring:
> >  	xennet_disconnect_backend(info);
> > -	kfree(info->queues);
> > -	info->queues = NULL;
> > +	xennet_destroy_queues(info);
> >   out:
> > +	unregister_netdev(info->netdev);
> > +	xennet_free_netdev(info->netdev);
> >  	return err;
> >  }
> 
> This last bit of cleanup looks wrong.  It was subsequently changed
> upstream by:
> 
> 86b5672b1adb xen-netfront: avoid crashing on resume after a failure in talk_to_netback()

Good catch, but it's d86b5672b1ad ("xen-netfront: avoid crashing on
resume after a failure in talk_to_netback()")

:)

thanks,

greg k-h