From: David Miller <davem@davemloft.net>
To: eric.dumazet@gmail.com
Cc: netdev@vger.kernel.org, dvyukov@google.com
Subject: Re: [PATCH net] tcp: fix 0 divide in __tcp_select_window()
Date: Wed, 01 Feb 2017 12:56:08 -0500 (EST) [thread overview]
Message-ID: <20170201.125608.445685471651002821.davem@davemloft.net> (raw)
In-Reply-To: <1485966833.6360.149.camel@edumazet-glaptop3.roam.corp.google.com>
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 01 Feb 2017 08:33:53 -0800
> From: Eric Dumazet <edumazet@google.com>
>
> syszkaller fuzzer was able to trigger a divide by zero, when
> TCP window scaling is not enabled.
>
> SO_RCVBUF can be used not only to increase sk_rcvbuf, also
> to decrease it below current receive buffers utilization.
>
> If mss is negative or 0, just return a zero TCP window.
>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
> Reported-by: Dmitry Vyukov <dvyukov@google.com>
> ---
> No Fixes: tag, this is a day-0 bug.
Applied and queued up for -stable, thanks Eric.
prev parent reply other threads:[~2017-02-01 17:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-01 16:33 [PATCH net] tcp: fix 0 divide in __tcp_select_window() Eric Dumazet
2017-02-01 16:41 ` Neal Cardwell
2017-02-01 17:56 ` David Miller [this message]
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