netdev - Re: [PATCH net] bonding: update nest level on unlink

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Message-Id: <20190110.135057.272040438746970907.davem@davemloft.net>
Date:   Thu, 10 Jan 2019 13:50:57 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     willemdebruijn.kernel@...il.com
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, j.vosburgh@...il.com,
        vfalico@...il.com, andy@...yhouse.net, willemb@...gle.com,
        syzkaller@...glegroups.com
Subject: Re: [PATCH net] bonding: update nest level on unlink

From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Date: Tue,  8 Jan 2019 12:32:42 -0500

> From: Willem de Bruijn <willemb@...gle.com>
> 
> A network device stack with multiple layers of bonding devices can
> trigger a false positive lockdep warning. Adding lockdep nest levels
> fixes this. Update the level on both enslave and unlink, to avoid the
> following series of events ..
 ...
> Fixes: 7e2556e40026 ("bonding: avoid lockdep confusion in bond_get_stats()")
> Reported-by: syzbot <syzkaller@...glegroups.com>
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>

Applied, and queued up for -stable.