linux-kernel - Re: [PATCH net v2] NFC: nci: fix sleep in atomic context bugs caused by nci_skb

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Date:   Wed, 18 May 2022 01:10:11 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Duoming Zhou <duoming@....edu.cn>
Cc:     linux-kernel@...r.kernel.org, kuba@...nel.org,
        krzysztof.kozlowski@...aro.org, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, gregkh@...uxfoundation.org,
        alexander.deucher@....com, broonie@...nel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH net v2] NFC: nci: fix sleep in atomic context bugs caused by
 nci_skb_alloc

Hello:

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

On Tue, 17 May 2022 09:25:30 +0800 you wrote:
> There are sleep in atomic context bugs when the request to secure
> element of st-nci is timeout. The root cause is that nci_skb_alloc
> with GFP_KERNEL parameter is called in st_nci_se_wt_timeout which is
> a timer handler. The call paths that could trigger bugs are shown below:
> 
>     (interrupt context 1)
> st_nci_se_wt_timeout
>   nci_hci_send_event
>     nci_hci_send_data
>       nci_skb_alloc(..., GFP_KERNEL) //may sleep
> 
> [...]

Here is the summary with links:
  - [net,v2] NFC: nci: fix sleep in atomic context bugs caused by nci_skb_alloc
    https://git.kernel.org/netdev/net/c/23dd4581350d

You are awesome, thank you!
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