netdev - Re: net/ipv4: divide error in __tcp_select

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Message-Id: <20170831.122543.754410467437404852.davem@davemloft.net>
Date:   Thu, 31 Aug 2017 12:25:43 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     ncardwell@...gle.com
Cc:     idaifish@...il.com, kuznet@....inr.ac.ru, netdev@...r.kernel.org,
        syzkaller@...glegroups.com, weiwan@...gle.com, edumazet@...gle.com
Subject: Re: net/ipv4: divide error in __tcp_select_window

From: Neal Cardwell <ncardwell@...gle.com>
Date: Thu, 31 Aug 2017 07:11:28 -0400

> Thanks for the report. I believe this tcp_recvmsg  => tcp_cleanup_rbuf
>  => __tcp_select_window divide-by-zero issue was fixed in May by Wei,
> in:
> 
>  499350a5a6e7 tcp: initialize rcv_mss to TCP_MIN_MSS instead of 0
>  https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=499350a5a6e7
> 
> Looks like we should probably mark this as a -stable candidate, so
> that it will eventually make it to 4.4.y, 4.9.y, 4.12.y users, etc. (I
> don't see the commit in those stable branches.)

Ok, queued up for -stable, thanks.