Re: [PATCH net v4] mptcp: do not use Fast Open on MP_JOIN subflows

From: patchwork-bot+netdevbpf

Date: Wed Nov 04 2026 - 10:06:14 EST


Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@xxxxxxxxxx>:

On Fri, 30 Oct 2026 23:03:51 +0100 you wrote:
> From: Yilin Zhang <yilinzhang@xxxxxxxxxxx>
>
> tcp_fastopen_create_child() hands the SYN packet itself to
> subflow_syn_recv_sock(). For an MP_JOIN request this takes the
> fatal fallback: the cloned child is destroyed and handed back with
> drop_req flagged, but tcp_fastopen_create_child() does not check
> the flag and queues it, so accept() can expose the freed child.
>
> [...]

Here is the summary with links:
- [net,v4] mptcp: do not use Fast Open on MP_JOIN subflows
https://git.kernel.org/netdev/net/c/6d2cf411aba2

You are awesome, thank you!
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