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From: David Miller <davem@davemloft.net>
Subject: Re: Crash due to mutex genl_lock called from RCU context
Date: Tue, 29 Nov 2016 19:49:00 -0500 (EST)
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From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 28 Nov 2016 19:22:12 +0800

> netlink: Call cb->done from a worker thread
> 
> The cb->done interface expects to be called in process context.
> This was broken by the netlink RCU conversion.  This patch fixes
> it by adding a worker struct to make the cb->done call where
> necessary.
> 
> Fixes: 21e4902aea80 ("netlink: Lockless lookup with RCU grace...")
> Reported-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Applied and queued up for -stable, thanks Herbert.