netdev - Re: [PATCH net] net: lapbether: use netdev_lockdep_set

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Message-ID: <CANn89iJEYkroSipgVERCS575m17qEYGbpFgHw4OSinyc-8znUg@mail.gmail.com>
Date: Sun, 9 Mar 2025 10:42:33 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: Simon Horman <horms@...nel.org>, Stanislav Fomichev <sdf@...ichev.me>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com, syzbot+377b71db585c9c705f8e@...kaller.appspotmail.com
Subject: Re: [PATCH net] net: lapbether: use netdev_lockdep_set_classes() helper

On Sun, Mar 9, 2025 at 10:39 AM Eric Dumazet <edumazet@...gle.com> wrote:
>
> drivers/net/wan/lapbether.c uses stacked devices.
> Like similar drivers, it must use netdev_lockdep_set_classes()
> to avoid LOCKDEP splats.
>
> This is similar to commit 9bfc9d65a1dc ("hamradio:
> use netdev_lockdep_set_classes() helper")
>
> Fixes: 7e4d784f5810 ("net: hold netdev instance lock during rtnetlink operations")
> Reported-by: syzbot+377b71db585c9c705f8e@...kaller.appspotmail.com
> Closes: https://lore.kernel.org/netdev/67cd611c.050a0220.14db68.0073.GAE@google.com/T/#u
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---

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