Backport to 6.6 and 6.1

Backport to 6.6 and 6.1

[Eric Dumazet]

Hi team

Would you be kind enough to backport the following patch to 6.6 and 6.1 ?

For some reason we missed that the issue was serious, no Fixes: tag at
that time :/

It applies cleanly.

commit 795a7dfbc3d95e4c7c09569f319f026f8c7f5a9c
Author: Menglong Dong <menglong8.dong@gmail.com>
Date:   Fri Jan 26 12:05:19 2024 +0800

    net: tcp: accept old ack during closing

Thanks a lot !

Related : packetdrill test sent to net-next today:

https://lore.kernel.org/netdev/20260313115429.3365751-1-edumazet@google.com/T/#u

Re: Backport to 6.6 and 6.1

[Greg KH]

On Fri, Mar 13, 2026 at 01:34:27PM +0100, Eric Dumazet wrote:
> Hi team
> 
> Would you be kind enough to backport the following patch to 6.6 and 6.1 ?
> 
> For some reason we missed that the issue was serious, no Fixes: tag at
> that time :/
> 
> It applies cleanly.
> 
> commit 795a7dfbc3d95e4c7c09569f319f026f8c7f5a9c
> Author: Menglong Dong <menglong8.dong@gmail.com>
> Date:   Fri Jan 26 12:05:19 2024 +0800
> 
>     net: tcp: accept old ack during closing
> 
> Thanks a lot !
> 
> Related : packetdrill test sent to net-next today:
> 
> https://lore.kernel.org/netdev/20260313115429.3365751-1-edumazet@google.com/T/#u
> 

Now queued up,t hanks.

greg k-h