netdev - Re: [PATCH] fix tcp fin memory accounting

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Message-ID: <5538F821.6070503@akamai.com>
Date:	Thu, 23 Apr 2015 08:48:17 -0500
From:	Josh Hunt <johunt@...mai.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	edumazet@...gle.com
Subject: Re: [PATCH] fix tcp fin memory accounting

On 04/21/2015 07:09 PM, Eric Dumazet wrote:
>
> Note that this patch adds a deadlock possibility in some stress
> situations.
>
> If a process owning some tcp socket dies, and tcp_mem[2] is already hit,
> all sk_stream_alloc_skb() can return NULL and we loop in tcp_send_fin(),
> making no progress because we can not free any tcp memory.

Ugh. Thanks for fixing this Eric!

Josh
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