netdev - Re: Crash due to mutex genl_lock called from RCU context

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Message-ID: <CAM_iQpWE2ZZLyT6wi7WVUOWs_m=CSEtH0magKgt8JafZLBf0ig@mail.gmail.com>
Date:   Mon, 28 Nov 2016 20:33:55 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>,
        Thomas Graf <tgraf@...g.ch>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: Crash due to mutex genl_lock called from RCU context

On Mon, Nov 28, 2016 at 3:22 AM, Herbert Xu <herbert@...dor.apana.org.au> wrote:
> 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@...eaurora.org>
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>


Looks good,

Acked-by: Cong Wang <xiyou.wangcong@...il.com>

Thanks!