linux-kernel - Re: [PATCH v5 2/3] net: add kcov handle to skb extensions

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Message-ID: <20201201084339.6d4efa5a@kicinski-fedora-pc1c0hjn.DHCP.thefacebook.com>
Date:   Tue, 1 Dec 2020 08:43:39 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Ido Schimmel <idosch@...sch.org>
Cc:     Aleksandr Nogikh <aleksandrnogikh@...il.com>, fw@...len.de,
        davem@...emloft.net, johannes@...solutions.net,
        edumazet@...gle.com, andreyknvl@...gle.com, dvyukov@...gle.com,
        elver@...gle.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
        willemdebruijn.kernel@...il.com,
        Aleksandr Nogikh <nogikh@...gle.com>,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH v5 2/3] net: add kcov handle to skb extensions

On Tue, 1 Dec 2020 09:35:29 +0200 Ido Schimmel wrote:
> > Looking at the patch from Marco to move back to a field now I'm
> > wondering how you run into this, Ido :D
> > 
> > AFAIU the extension is only added if process as a KCOV handle.
> > 
> > Are you using KCOV?  
> 
> Hi Jakub,
> 
> Yes. We have an internal syzkaller instance where this is enabled. See
> "syz-executor.0" in the trace below.

I see, thanks! The world makes sense again :)