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From: patchwork-bot+netdevbpf@kernel.org
To: Lee Jones <lee@kernel.org>
Cc: jchapman@katalix.com, davem@davemloft.net, edumazet@google.com,
	kuba@kernel.org, pabeni@redhat.com, horms@kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/1] l2tp: pppol2tp: hold reference to session in pppol2tp_ioctl()
Date: Tue, 02 Jun 2026 02:50:12 +0000	[thread overview]
Message-ID: <178036861290.217677.5272140952130981669.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260527133630.2120612-1-lee@kernel.org>

Hello:

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

On Wed, 27 May 2026 13:36:29 +0000 you wrote:
> pppol2tp_ioctl() read sock->sk->sk_user_data directly without any
> locks or reference counting.  If a controllable sleep was induced during
> copy_from_user() (e.g. via a userfaultfd page fault sleep), a concurrent
> socket close could trigger pppol2tp_session_close() asynchronously.  This
> frees the l2tp_session structure via the l2tp_session_del_work workqueue.
> Upon resuming, the ioctl thread dereferences the stale session pointer,
> resulting in a Use-After-Free (UAF).
> 
> [...]

Here is the summary with links:
  - [v2,1/1] l2tp: pppol2tp: hold reference to session in pppol2tp_ioctl()
    https://git.kernel.org/netdev/net/c/a213a8950414

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html



      parent reply	other threads:[~2026-06-02  2:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-27 13:36 Lee Jones
2026-05-27 13:46 ` Lee Jones
2026-06-02  2:50 ` patchwork-bot+netdevbpf [this message]

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