From: Florian Westphal <f...@strlen.de>
Date: Wed, 26 Aug 2020 01:31:05 +0200
> After subflow lock is dropped, more wmem might have been made available.
>
> This fixes a deadlock in mptcp_connect.sh 'mmap' mode: wmem is exhausted.
> But as the mptcp socket holds on to already-acked data (for retransmit)
> no wakeup will occur.
>
> Using 'goto restart' calls mptcp_clean_una(sk) which will free pages
> that have been acked completely in the mean time.
>
> Fixes: fb529e62d3f3 ("mptcp: break and restart in case mptcp sndbuf is full")
> Signed-off-by: Florian Westphal <f...@strlen.de>
Applied and queued up for -stable, thanks.
