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Date: Tue, 02 Feb 2016 06:06:40 -0800
From: Eric Dumazet <eric.dumazet@...il.com>
To: subashab@...eaurora.org
Cc: Netdev <netdev@...r.kernel.org>,
Eric Dumazet <edumazet@...gle.com>, Erik Kline <ek@...gle.com>,
Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: Re: [PATCH v2] ipv6: addrconf: Fix recursive spin lock call
On Tue, 2016-02-02 at 02:11 +0000, subashab@...eaurora.org wrote:
> A rcu stall with the following backtrace was seen on a system with
> forwarding, optimistic_dad and use_optimistic set. To reproduce,
> set these flags and allow ipv6 autoconf.
>
> This occurs because the device write_lock is acquired while already
> holding the read_lock. Back trace below -
Acked-by: Eric Dumazet <edumazet@...gle.com>
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