netdev - Re: [PATCH net] tcp: refine memory limit test in tcp

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Date:   Fri, 21 Jun 2019 21:00:13 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com, cpaasch@...le.com
Subject: Re: [PATCH net] tcp: refine memory limit test in tcp_fragment()

From: Eric Dumazet <edumazet@...gle.com>
Date: Fri, 21 Jun 2019 06:09:55 -0700

> tcp_fragment() might be called for skbs in the write queue.
> 
> Memory limits might have been exceeded because tcp_sendmsg() only
> checks limits at full skb (64KB) boundaries.
> 
> Therefore, we need to make sure tcp_fragment() wont punish applications
> that might have setup very low SO_SNDBUF values.
> 
> Fixes: f070ef2ac667 ("tcp: tcp_fragment() should apply sane memory limits")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Reported-by: Christoph Paasch <cpaasch@...le.com>

Applied and queued up for -stable.