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Date:   Sun, 28 Jun 2020 21:42:18 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH net] llc: make sure applications use ARPHRD_ETHER

From: Eric Dumazet <>
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 <>

Applied and queued up for -stable, thanks Eric.

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