netdev - [PATCHv2-net-3.8 0/3] fix kernel crash with macvtap on top of LRO

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Message-ID: <cover.1360236441.git.mst@redhat.com>
Date:	Thu, 7 Feb 2013 15:12:56 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Eilon Greenstein <eilong@...adcom.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Carolyn Wyborny <carolyn.wyborny@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	Greg Rose <gregory.v.rose@...el.com>,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>,
	Alex Duyck <alexander.h.duyck@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	Tushar Dave <tushar.n.dave@...el.com>,
	Jitendra Kalsaria <jitendra.kalsaria@...gic.com>,
	Sony Chacko <sony.chacko@...gic.com>, linux-driver@...gic.com,
	John Fastabend <john.r.fastabend@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jacob Keller <jacob.e.keller@...el.com>,
	linux-kernel@...r.kernel.org, e1000-devel@...ts.sourceforge.net,
	bhutchings@...arflare.com, eric.dumazet@...il.com
Subject: [PATCHv2-net-3.8 0/3] fix kernel crash with macvtap on top of LRO

At the moment, macvtap crashes are observed if macvtap is attached
to an interface with LRO enabled.
The crash in question is BUG() in macvtap_skb_to_vnet_hdr.
This happens because several drivers set gso_size but not gso_type
in incoming skbs.
This didn't use to be the case: with intel cards on 3.2 and older
kernels, with qlogic - on 3.4 and older kernels, so it's a regression if
not a recent one.
The following patches fix this for qlogic, broadcom and intel drivers.

I tested that the patch fixes the crash for ixgbe but
don't have qlogic/broadcom hardware to test.
I also only tested TCPv4.

Please review, and consider for 3.8.

Changes from v1:
	- added missing htons as suggested by Eric
	- backported the relevant bits from
	  cbf1de72324a8105ddcc3d9ce9acbc613faea17e for bnx2x

Michael S. Tsirkin (3):
  ixgbe: fix gso type
  qlcnic: set gso_type
  bnx2x: set gso_type

 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c | 12 +++++-------
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c   |  8 ++++++--
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c  |  7 ++++++-
 3 files changed, 17 insertions(+), 10 deletions(-)

-- 
MST
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