netdev - Re: [PATCH net] llc: make sure applications use ARPHRD

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Message-Id: <20200628.214218.1545115469096968495.davem@davemloft.net>
Date:   Sun, 28 Jun 2020 21:42:18 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net] llc: make sure applications use ARPHRD_ETHER

From: Eric Dumazet <edumazet@...gle.com>
Date: Sat, 27 Jun 2020 13:31:50 -0700

> syzbot was to trigger a bug by tricking AF_LLC with
> non sensible addr->sllc_arphrd
> 
> It seems clear LLC requires an Ethernet device.
> 
> Back in commit abf9d537fea2 ("llc: add support for SO_BINDTODEVICE")
> Octavian Purdila added possibility for application to use a zero
> value for sllc_arphrd, convert it to ARPHRD_ETHER to not cause
> regressions on existing applications.
 ...
> Fixes: abf9d537fea2 ("llc: add support for SO_BINDTODEVICE")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied and queued up for -stable, thanks Eric.