[PATCHv2 net 0/3] Prevent extreme TSO parameters from stalling TX queues

[Ben Hutchings <bhutchings@solarflare.com>]

The following changes fix a potential DoS by peers or local users on
network interfaces using the sfc driver (and possibly others) with TSO
enabled (as it is by default).

Please apply patches 1 and 2 to the net tree and your stable update
queue.  I'm not sure whether patch 3 is really important.

Ben.

Ben Hutchings (3):
  net: Allow driver to limit number of GSO segments per skb
  sfc: Fix maximum number of TSO segments and minimum TX queue size
  tcp: Apply device TSO segment limit earlier

 drivers/net/ethernet/sfc/efx.c     |    6 ++++++
 drivers/net/ethernet/sfc/efx.h     |   14 ++++++++++----
 drivers/net/ethernet/sfc/ethtool.c |   16 +++++++++++-----
 drivers/net/ethernet/sfc/tx.c      |   19 +++++++++++++++++++
 include/linux/netdevice.h          |    2 ++
 include/net/sock.h                 |    2 ++
 net/core/dev.c                     |    4 ++++
 net/core/sock.c                    |    1 +
 net/ipv4/tcp.c                     |    4 +++-
 net/ipv4/tcp_cong.c                |    3 ++-
 net/ipv4/tcp_output.c              |   21 ++++++++++++---------
 11 files changed, 72 insertions(+), 20 deletions(-)

-- 
1.7.7.6


-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.