linux-kernel - Re: [PATCH V2 net] hv_netvsc: Fix race condition between netvsc_probe and netvsc

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Date: Thu, 01 Feb 2024 16:40:26 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>
Cc: kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
 decui@...rosoft.com, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, longli@...rosoft.com,
 yury.norov@...il.com, leon@...nel.org, cai.huoqing@...ux.dev,
 ssengar@...ux.microsoft.com, vkuznets@...hat.com, tglx@...utronix.de,
 linux-hyperv@...r.kernel.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
 schakrabarti@...rosoft.com, stable@...r.kernel.org
Subject: Re: [PATCH V2 net] hv_netvsc: Fix race condition between netvsc_probe and
 netvsc_remove

Hello:

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

On Tue, 30 Jan 2024 23:35:51 -0800 you wrote:
> In commit ac5047671758 ("hv_netvsc: Disable NAPI before closing the
> VMBus channel"), napi_disable was getting called for all channels,
> including all subchannels without confirming if they are enabled or not.
> 
> This caused hv_netvsc getting hung at napi_disable, when netvsc_probe()
> has finished running but nvdev->subchan_work has not started yet.
> netvsc_subchan_work() -> rndis_set_subchannel() has not created the
> sub-channels and because of that netvsc_sc_open() is not running.
> netvsc_remove() calls cancel_work_sync(&nvdev->subchan_work), for which
> netvsc_subchan_work did not run.
> 
> [...]

Here is the summary with links:
  - [V2,net] hv_netvsc: Fix race condition between netvsc_probe and netvsc_remove
    https://git.kernel.org/netdev/net/c/e0526ec5360a

You are awesome, thank you!
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