From: David Miller <davem@davemloft.net>
To: jesse.brandeburg@intel.com
Cc: eric.dumazet@gmail.com, therbert@google.com,
netdev@vger.kernel.org, alexander.h.duyck@intel.com
Subject: Re: Bug in computing data_len in tcp_sendmsg?
Date: Thu, 01 Dec 2011 13:04:03 -0500 (EST) [thread overview]
Message-ID: <20111201.130403.1392783813860983313.davem@davemloft.net> (raw)
In-Reply-To: <20111201092950.00006ce8@unknown>
From: Jesse Brandeburg <jesse.brandeburg@intel.com>
Date: Thu, 1 Dec 2011 09:29:50 -0800
> Tom, thanks very much for finding this subtle bug! I bet that this
> commit (which I had missed) broke a lot of other drivers in
> very subtle ways due to changing a long standing behavior.
I call bullshit on this.
It's always been possible, any entity between the TCP stack and your
driver can pull data from the segmented pages into the linear data
area.
F.e. netfilter, packet scheduler actions, you name it.
This code sequence has always been buggy.
next prev parent reply other threads:[~2011-12-01 18:04 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-01 1:48 Bug in computing data_len in tcp_sendmsg? Tom Herbert
2011-12-01 3:42 ` Eric Dumazet
2011-12-01 4:06 ` Tom Herbert
2011-12-01 4:16 ` David Miller
2011-12-01 4:17 ` Eric Dumazet
2011-12-01 5:09 ` Tom Herbert
2011-12-01 9:15 ` Eric Dumazet
2011-12-01 17:29 ` Jesse Brandeburg
2011-12-01 18:04 ` David Miller [this message]
2011-12-01 20:37 ` Eric Dumazet
2011-12-01 22:18 ` Vijay Subramanian
2011-12-01 22:30 ` Eric Dumazet
2011-12-02 6:18 ` Vijay Subramanian
2011-12-02 11:59 ` Eric Dumazet
2011-12-02 15:44 ` Eric Dumazet
2011-12-02 16:05 ` Eric Dumazet
2011-12-02 18:13 ` David Miller
2011-12-02 18:36 ` Eric Dumazet
2011-12-02 18:40 ` David Miller
2011-12-02 20:22 ` Eric Dumazet
2011-12-02 20:24 ` David Miller
2011-12-02 20:45 ` Eric Dumazet
2011-12-02 20:48 ` Eric Dumazet
2011-12-02 21:30 ` David Miller
2011-12-03 15:09 ` Eric Dumazet
2011-12-04 7:39 ` [PATCH] tcp: take care of misalignments Eric Dumazet
2011-12-04 18:21 ` David Miller
2011-12-04 18:51 ` Eric Dumazet
2011-12-05 23:45 ` David Miller
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