netdev - Re: [PATCH net] tipc: call tipc_lxc_xmit without holding node_read

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Message-Id: <167041021637.1929.7865050600369880856.git-patchwork-notify@kernel.org>
Date:   Wed, 07 Dec 2022 10:50:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Xin Long <lucien.xin@...il.com>
Cc:     netdev@...r.kernel.org, tipc-discussion@...ts.sourceforge.net,
        davem@...emloft.net, kuba@...nel.org, edumazet@...gle.com,
        pabeni@...hat.com, jmaloy@...hat.com, ying.xue@...driver.com,
        shuali@...hat.com, hoang.h.le@...tech.com.au
Subject: Re: [PATCH net] tipc: call tipc_lxc_xmit without holding node_read_lock

Hello:

This patch was applied to netdev/net.git (master)
by Paolo Abeni <pabeni@...hat.com>:

On Sat,  3 Dec 2022 18:37:21 -0500 you wrote:
> When sending packets between nodes in netns, it calls tipc_lxc_xmit() for
> peer node to receive the packets where tipc_sk_mcast_rcv()/tipc_sk_rcv()
> might be called, and it's pretty much like in tipc_rcv().
> 
> Currently the local 'node rw lock' is held during calling tipc_lxc_xmit()
> to protect the peer_net not being freed by another thread. However, when
> receiving these packets, tipc_node_add_conn() might be called where the
> peer 'node rw lock' is acquired. Then a dead lock warning is triggered by
> lockdep detector, although it is not a real dead lock:
> 
> [...]

Here is the summary with links:
  - [net] tipc: call tipc_lxc_xmit without holding node_read_lock
    https://git.kernel.org/netdev/net/c/88956177db17

You are awesome, thank you!
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