linux-kernel - Re: [PATCH v2] net: hso: do not call unregister if not registered

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20201004071433.GA212114@kroah.com>
Date:   Sun, 4 Oct 2020 09:14:33 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     David Miller <davem@...emloft.net>, tuba@....ufl.edu
Cc:     netdev@...r.kernel.org, kuba@...nel.org, oneukum@...e.com,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v2] net: hso: do not call unregister if not registered

On Sat, Oct 03, 2020 at 05:00:42PM -0700, David Miller wrote:
> From: Greg KH <gregkh@...uxfoundation.org>
> Date: Fri, 2 Oct 2020 13:43:23 +0200
> 
> > @@ -2366,7 +2366,8 @@ static void hso_free_net_device(struct hso_device *hso_dev, bool bailout)
> >  
> >  	remove_net_device(hso_net->parent);
> >  
> > -	if (hso_net->net)
> > +	if (hso_net->net &&
> > +	    hso_net->net->reg_state == NETREG_REGISTERED)
> >  		unregister_netdev(hso_net->net);
> >  
> >  	/* start freeing */
> 
> I really want to get out of the habit of drivers testing the internal
> netdev registration state to make decisions.
> 
> Instead, please track this internally.  You know if you registered the
> device or not, therefore use that to control whether you try to
> unregister it or not.

Fair enough.  Tuba, do you want to fix this up in this way, or do you
recommend that someone else do it?

thanks,

greg k-h