netdev - Re: [EXT] Re: [net PATCH 5/9] octeontx2-pf: mcs: Fix NULL pointer dereferences

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Date:   Tue, 25 Apr 2023 08:51:40 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Subbaraya Sundeep Bhatta <sbhatta@...vell.com>,
        Geethasowjanya Akula <gakula@...vell.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "richardcochran@...il.com" <richardcochran@...il.com>,
        Sunil Kovvuri Goutham <sgoutham@...vell.com>,
        Hariprasad Kelam <hkelam@...vell.com>
Subject: Re: [EXT] Re: [net PATCH 5/9] octeontx2-pf: mcs: Fix NULL pointer
 dereferences

On Mon, 24 Apr 2023 10:29:02 +0000 Subbaraya Sundeep Bhatta wrote:
> >How did you get call to .mdo_del_secy if you didn't add any secy?
> >
> >Thanks
> >  
> It is because of the order of teardown in otx2_remove:
>         cn10k_mcs_free(pf);
>         unregister_netdev(netdev);
> 
> cn10k_mcs_free free the resources and makes cfg as NULL.
> Later unregister_netdev calls mdo_del_secy and finds cfg as NULL.
> Thanks for the review I will change the order and submit next version.

Leon, ack? Looks like the patches got "changes requested" but I see 
no other complaint.