netdev - Re: [PATCH net] sfc: Don't invoke xdp_do

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Message-Id: 
 <172799583176.2017964.8627494683961349191.git-patchwork-notify@kernel.org>
Date: Thu, 03 Oct 2024 22:50:31 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: netdev@...r.kernel.org, linux-net-drivers@....com, bpf@...r.kernel.org,
 davem@...emloft.net, toke@...hat.com, ast@...nel.org, daniel@...earbox.net,
 ecree.xilinx@...il.com, edumazet@...gle.com, kuba@...nel.org,
 hawk@...nel.org, john.fastabend@...il.com, habetsm.xilinx@...il.com,
 pabeni@...hat.com, tglx@...utronix.de, mon@...ormed.ru
Subject: Re: [PATCH net] sfc: Don't invoke xdp_do_flush() from netpoll.

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Wed, 2 Oct 2024 14:58:37 +0200 you wrote:
> Yury reported a crash in the sfc driver originated from
> netpoll_send_udp(). The netconsole sends a message and then netpoll
> invokes the driver's NAPI function with a budget of zero. It is
> dedicated to allow driver to free TX resources, that it may have used
> while sending the packet.
> 
> In the netpoll case the driver invokes xdp_do_flush() unconditionally,
> leading to crash because bpf_net_context was never assigned.
> 
> [...]

Here is the summary with links:
  - [net] sfc: Don't invoke xdp_do_flush() from netpoll.
    https://git.kernel.org/netdev/net/c/55e802468e1d

You are awesome, thank you!
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