netdev - Re: [PATCH v3 net] cnic: Fix use-after-free bugs in cnic_delete

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Message-Id: 
 <175820761326.2450229.3063488196557086048.git-patchwork-notify@kernel.org>
Date: Thu, 18 Sep 2025 15:00:13 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Duoming Zhou <duoming@....edu.cn>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, pabeni@...hat.com,
 kuba@...nel.org, edumazet@...gle.com, davem@...emloft.net,
 andrew+netdev@...n.ch
Subject: Re: [PATCH v3 net] cnic: Fix use-after-free bugs in cnic_delete_task

Hello:

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

On Wed, 17 Sep 2025 13:46:02 +0800 you wrote:
> The original code uses cancel_delayed_work() in cnic_cm_stop_bnx2x_hw(),
> which does not guarantee that the delayed work item 'delete_task' has
> fully completed if it was already running. Additionally, the delayed work
> item is cyclic, the flush_workqueue() in cnic_cm_stop_bnx2x_hw() only
> blocks and waits for work items that were already queued to the
> workqueue prior to its invocation. Any work items submitted after
> flush_workqueue() is called are not included in the set of tasks that the
> flush operation awaits. This means that after the cyclic work items have
> finished executing, a delayed work item may still exist in the workqueue.
> This leads to use-after-free scenarios where the cnic_dev is deallocated
> by cnic_free_dev(), while delete_task remains active and attempt to
> dereference cnic_dev in cnic_delete_task().
> 
> [...]

Here is the summary with links:
  - [v3,net] cnic: Fix use-after-free bugs in cnic_delete_task
    https://git.kernel.org/netdev/net/c/cfa7d9b1e3a8

You are awesome, thank you!
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