From: Andrew Lunn <andrew@xxxxxxx>
Date: Tue, 17 Apr 2018 23:59:33 +0200
> [ Upstream commit fc5f33768cca7144f8d793205b229d46740d183b ]
>
> The Marvell switches under some conditions will pass a frame to the
> host with the port being the CPU port. Such frames are invalid, and
> should be dropped. Not dropping them can result in a crash when
> incrementing the receive statistics for an invalid port.
>
> This has been reworked for 4.14, which does not have the central
> dsa_master_find_slave() function, so each tag driver needs to check.
>
> Reported-by: Chris Healy <cphealy@xxxxxxxxx>
> Fixes: 91da11f870f0 ("net: Distributed Switch Architecture protocol support")
> Signed-off-by: Andrew Lunn <andrew@xxxxxxx>
> Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable folks, please queue up this backport for 4.14 stable.
Thanks!