netdev - Re: [PATCH net] net/xen-netback: prevent UAF in xenvif_flush

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Message-Id: 
 <172489083974.1473828.6183768950292270791.git-patchwork-notify@kernel.org>
Date: Thu, 29 Aug 2024 00:20:39 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Jeongjun Park <aha310510@...il.com>
Cc: wei.liu@...nel.org, paul@....org, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 madhuparnabhowmik04@...il.com, xen-devel@...ts.xenproject.org,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net/xen-netback: prevent UAF in xenvif_flush_hash()

Hello:

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

On Fri, 23 Aug 2024 03:11:09 +0900 you wrote:
> During the list_for_each_entry_rcu iteration call of xenvif_flush_hash,
> kfree_rcu does not exist inside the rcu read critical section, so if
> kfree_rcu is called when the rcu grace period ends during the iteration,
> UAF occurs when accessing head->next after the entry becomes free.
> 
> Therefore, to solve this, you need to change it to list_for_each_entry_safe.
> 
> [...]

Here is the summary with links:
  - [net] net/xen-netback: prevent UAF in xenvif_flush_hash()
    https://git.kernel.org/netdev/net-next/c/0fa5e94a1811

You are awesome, thank you!
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