netdev - Re: mv88e6060: NULL dereference in dsa_slave

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Message-ID: <20220819175153.d6p7atcmusuyzqvp@skbuf>
Date:   Fri, 19 Aug 2022 20:52:13 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Sergei Antonov <saproj@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: mv88e6060: NULL dereference in dsa_slave_changeupper()

On Fri, Aug 19, 2022 at 06:11:46PM +0300, Sergei Antonov wrote:
> Hello!
> I am using the current netdev/net.git kernel. My DSA is mv88e6060
> (CONFIG_NET_DSA_MV88E6060).
> These two commands cause a crash:
> ~ # brctl addbr mybridge
> ~ # brctl addif mybridge lan2

Thanks for the report. Just to not leave this thread hanging, I've sent:
https://lore.kernel.org/netdev/20220819173925.3581871-1-vladimir.oltean@nxp.com/

FWIW, these days we use:
ip link add br0 type bridge
ip link set lan2 master br0

this is why normally it doesn't crash, extack is a netlink feature,
which brctl doesn't use. But we should keep ioctls working too, though.