Please queue up f4dca95fc0f6 for 6.9 et.al.

[Holger Hoffstätte <holger@xxxxxxxxxxxxxxxxxxxxxx>]

Just ${Subject} since it's a fix for a potential security footgun/DOS, whereever
commit 378979e94e95 ("tcp: remove 64 KByte limit for initial tp->rcv_wnd value")
has been queued up.

Thanks!
Holger