linux-kernel - Re: [PATCH net v5] net: ax25: Fix deadlock caused by skb_recv_datagram in ax25

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Message-Id: <165529561325.20387.9560588021294882995.git-patchwork-notify@kernel.org>
Date:   Wed, 15 Jun 2022 12:20:13 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Duoming Zhou <duoming@....edu.cn>
Cc:     linux-hams@...r.kernel.org, pabeni@...hat.com, jreuter@...na.de,
        ralf@...ux-mips.org, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, thomas@...erried.de
Subject: Re: [PATCH net v5] net: ax25: Fix deadlock caused by skb_recv_datagram in
 ax25_recvmsg

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@...emloft.net>:

On Tue, 14 Jun 2022 17:25:57 +0800 you wrote:
> The skb_recv_datagram() in ax25_recvmsg() will hold lock_sock
> and block until it receives a packet from the remote. If the client
> doesn`t connect to server and calls read() directly, it will not
> receive any packets forever. As a result, the deadlock will happen.
> 
> The fail log caused by deadlock is shown below:
> 
> [...]

Here is the summary with links:
  - [net,v5] net: ax25: Fix deadlock caused by skb_recv_datagram in ax25_recvmsg
    https://git.kernel.org/netdev/net/c/219b51a6f040

You are awesome, thank you!
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