linux-kernel - Re: [PATCH] net: tun: set tun->dev->addr

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Date:   Tue, 6 Apr 2021 18:38:54 +0100
From:   Phillip Potter <phil@...lpotter.co.uk>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH] net: tun: set tun->dev->addr_len during TUNSETLINK
 processing

On Tue, Apr 06, 2021 at 07:26:29PM +0200, Eric Dumazet wrote:
> 
> 
> On 4/5/21 1:35 PM, Phillip Potter wrote:
> > When changing type with TUNSETLINK ioctl command, set tun->dev->addr_len
> > to match the appropriate type, using new tun_get_addr_len utility function
> > which returns appropriate address length for given type. Fixes a
> > KMSAN-found uninit-value bug reported by syzbot at:
> > https://syzkaller.appspot.com/bug?id=0766d38c656abeace60621896d705743aeefed51
> > 
> > Reported-by: syzbot+001516d86dbe88862cec@...kaller.appspotmail.com
> > Signed-off-by: Phillip Potter <phil@...lpotter.co.uk>
> > ---
> 
> Please give credits to people who helped.
> 
> You could have :
> 
> Suggested-by: Eric Dumazet <edumazet@...gle.com>
> 
> Or
> Diagnosed-by: Eric Dumazet <edumazet@...gle.com>
> 
> Or at least CCed me :/
> 

Dear Eric,

Please accept my apology for this oversight. It certainly wasn't
intentional on my part, and entirely down to inexperience. I will send
the patch again with Diagnosed-by.

Regards,
Phil