TCP Cubic keeps a metric that estimates the amount of delayed
acknowledgements to use in adjusting the window. If an abnormally
large number of packets are acknowledged at once, then the update
could wrap and reach zero. This kind of ACK could only
happen when there was a large window and huge number of
ACK's were lost.

This patch limits the value of delayed ack ratio. The choice of 32
is just a conservative value since normally it should be range of
1 to 4 packets.
Signed-off-by: NStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The USB protocol this driver implements appears to require 2 bytes of
padding in front of each received packet.  This used to be equal to
the value of NET_IP_ALIGN on x86, so the driver abused that constant
and mostly worked, but this is no longer the case.  The driver also
mixed up the URB and packet lengths, resulting in 2 bytes of junk at
the end of the skb.

Introduce a private constant for the 2 bytes of padding; fix this
confusion and check for the under-length case.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Using the vmxnet3 driver produces a lockdep warning because
vmxnet3_set_mc(), which is called with mc->mca_lock held, takes
adapter->cmd_lock.  However, there are a couple of places where
adapter->cmd_lock is taken with softirqs enabled, lockdep warns that a
softirq that tries to take mc->mca_lock could happen while
adapter->cmd_lock is held, leading to an AB-BA deadlock.

I'm not sure if this is a real potential deadlock or not, but the
simplest and best fix seems to be simply to make sure we take cmd_lock
with spin_lock_irqsave() everywhere -- the places with plain spin_lock
just look like oversights.

The full enormous lockdep warning is:

 =========================================================
 [ INFO: possible irq lock inversion dependency detected ]
 2.6.39-rc6+ #1
 ---------------------------------------------------------
 ifconfig/567 just changed the state of lock:
  (&(&mc->mca_lock)->rlock){+.-...}, at: [<ffffffff81531e9f>] mld_ifc_timer_expire+0xff/0x280
 but this lock took another, SOFTIRQ-unsafe lock in the past:
  (&(&adapter->cmd_lock)->rlock){+.+...}

 and interrupts could create inverse lock ordering between them.

 other info that might help us debug this:
 4 locks held by ifconfig/567:
  #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8147d547>] rtnl_lock+0x17/0x20
  #1:  ((inetaddr_chain).rwsem){.+.+.+}, at: [<ffffffff810896cf>] __blocking_notifier_call_chain+0x5f/0xb0
  #2:  (&idev->mc_ifc_timer){+.-...}, at: [<ffffffff8106f21b>] run_timer_softirq+0xeb/0x3f0
  #3:  (&ndev->lock){++.-..}, at: [<ffffffff81531dd2>] mld_ifc_timer_expire+0x32/0x280

 the shortest dependencies between 2nd lock and 1st lock:
   -> (&(&adapter->cmd_lock)->rlock){+.+...} ops: 11 {
      HARDIRQ-ON-W at:
                                            [<ffffffff8109ad86>] __lock_acquire+0x7f6/0x1e10
                                            [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                            [<ffffffff81571156>] _raw_spin_lock+0x36/0x70
                                            [<ffffffffa000d212>] vmxnet3_alloc_intr_resources+0x22/0x230 [vmxnet3]
                                            [<ffffffffa0014031>] vmxnet3_probe_device+0x5f6/0x15c5 [vmxnet3]
                                            [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                            [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                            [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                            [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                            [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                            [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                            [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                            [<ffffffff813745b6>] driver_register+0x76/0x140
                                            [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                            [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                            [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                            [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                            [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
      SOFTIRQ-ON-W at:
                                            [<ffffffff8109adb7>] __lock_acquire+0x827/0x1e10
                                            [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                            [<ffffffff81571156>] _raw_spin_lock+0x36/0x70
                                            [<ffffffffa000d212>] vmxnet3_alloc_intr_resources+0x22/0x230 [vmxnet3]
                                            [<ffffffffa0014031>] vmxnet3_probe_device+0x5f6/0x15c5 [vmxnet3]
                                            [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                            [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                            [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                            [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                            [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                            [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                            [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                            [<ffffffff813745b6>] driver_register+0x76/0x140
                                            [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                            [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                            [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                            [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                            [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
      INITIAL USE at:
                                           [<ffffffff8109a9e9>] __lock_acquire+0x459/0x1e10
                                           [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                           [<ffffffff81571156>] _raw_spin_lock+0x36/0x70
                                           [<ffffffffa000d212>] vmxnet3_alloc_intr_resources+0x22/0x230 [vmxnet3]
                                           [<ffffffffa0014031>] vmxnet3_probe_device+0x5f6/0x15c5 [vmxnet3]
                                           [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                           [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                           [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                           [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                           [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                           [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                           [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                           [<ffffffff813745b6>] driver_register+0x76/0x140
                                           [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                           [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                           [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                           [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                           [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
    }
    ... key      at: [<ffffffffa0017590>] __key.42516+0x0/0xffffffffffffda70 [vmxnet3]
    ... acquired at:
    [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
    [<ffffffff81571bb5>] _raw_spin_lock_irqsave+0x55/0xa0
    [<ffffffffa000de27>] vmxnet3_set_mc+0x97/0x1a0 [vmxnet3]
    [<ffffffff8146ffa0>] __dev_set_rx_mode+0x40/0xb0
    [<ffffffff81470040>] dev_set_rx_mode+0x30/0x50
    [<ffffffff81470127>] __dev_open+0xc7/0x100
    [<ffffffff814703c1>] __dev_change_flags+0xa1/0x180
    [<ffffffff81470568>] dev_change_flags+0x28/0x70
    [<ffffffff814da960>] devinet_ioctl+0x730/0x800
    [<ffffffff814db508>] inet_ioctl+0x88/0xa0
    [<ffffffff814541f0>] sock_do_ioctl+0x30/0x70
    [<ffffffff814542a9>] sock_ioctl+0x79/0x2f0
    [<ffffffff81188798>] do_vfs_ioctl+0x98/0x570
    [<ffffffff81188d01>] sys_ioctl+0x91/0xa0
    [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b

  -> (_xmit_ETHER){+.....} ops: 6 {
     HARDIRQ-ON-W at:
                                          [<ffffffff8109ad86>] __lock_acquire+0x7f6/0x1e10
                                          [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                          [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                          [<ffffffff81475618>] __dev_mc_add+0x38/0x90
                                          [<ffffffff814756a0>] dev_mc_add+0x10/0x20
                                          [<ffffffff81532c9e>] igmp6_group_added+0x10e/0x1b0
                                          [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
                                          [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
                                          [<ffffffff81519f27>] addrconf_notify+0x2f7/0xb10
                                          [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
                                          [<ffffffff81089586>] raw_notifier_call_chain+0x16/0x20
                                          [<ffffffff814689b7>] call_netdevice_notifiers+0x37/0x70
                                          [<ffffffff8146a944>] register_netdevice+0x244/0x2d0
                                          [<ffffffff8146aa0f>] register_netdev+0x3f/0x60
                                          [<ffffffffa001419b>] vmxnet3_probe_device+0x760/0x15c5 [vmxnet3]
                                          [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                          [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                          [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                          [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                          [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                          [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                          [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                          [<ffffffff813745b6>] driver_register+0x76/0x140
                                          [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                          [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                          [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                          [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                          [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
     INITIAL USE at:
                                         [<ffffffff8109a9e9>] __lock_acquire+0x459/0x1e10
                                         [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                         [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                         [<ffffffff81475618>] __dev_mc_add+0x38/0x90
                                         [<ffffffff814756a0>] dev_mc_add+0x10/0x20
                                         [<ffffffff81532c9e>] igmp6_group_added+0x10e/0x1b0
                                         [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
                                         [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
                                         [<ffffffff81519f27>] addrconf_notify+0x2f7/0xb10
                                         [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
                                         [<ffffffff81089586>] raw_notifier_call_chain+0x16/0x20
                                         [<ffffffff814689b7>] call_netdevice_notifiers+0x37/0x70
                                         [<ffffffff8146a944>] register_netdevice+0x244/0x2d0
                                         [<ffffffff8146aa0f>] register_netdev+0x3f/0x60
                                         [<ffffffffa001419b>] vmxnet3_probe_device+0x760/0x15c5 [vmxnet3]
                                         [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                         [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                         [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                         [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                         [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                         [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                         [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                         [<ffffffff813745b6>] driver_register+0x76/0x140
                                         [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                         [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                         [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                         [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                         [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
   }
   ... key      at: [<ffffffff827fd868>] netdev_addr_lock_key+0x8/0x1e0
   ... acquired at:
    [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
    [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
    [<ffffffff81475618>] __dev_mc_add+0x38/0x90
    [<ffffffff814756a0>] dev_mc_add+0x10/0x20
    [<ffffffff81532c9e>] igmp6_group_added+0x10e/0x1b0
    [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
    [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
    [<ffffffff81519f27>] addrconf_notify+0x2f7/0xb10
    [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
    [<ffffffff81089586>] raw_notifier_call_chain+0x16/0x20
    [<ffffffff814689b7>] call_netdevice_notifiers+0x37/0x70
    [<ffffffff8146a944>] register_netdevice+0x244/0x2d0
    [<ffffffff8146aa0f>] register_netdev+0x3f/0x60
    [<ffffffffa001419b>] vmxnet3_probe_device+0x760/0x15c5 [vmxnet3]
    [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
    [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
    [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
    [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
    [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
    [<ffffffff81373a2e>] driver_attach+0x1e/0x20
    [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
    [<ffffffff813745b6>] driver_register+0x76/0x140
    [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
    [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
    [<ffffffff81002165>] do_one_initcall+0x45/0x190
    [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
    [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b

 -> (&(&mc->mca_lock)->rlock){+.-...} ops: 6 {
    HARDIRQ-ON-W at:
                                        [<ffffffff8109ad86>] __lock_acquire+0x7f6/0x1e10
                                        [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                        [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                        [<ffffffff81532bd5>] igmp6_group_added+0x45/0x1b0
                                        [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
                                        [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
                                        [<ffffffff81ce0d16>] addrconf_init+0x4e/0x183
                                        [<ffffffff81ce0ba1>] inet6_init+0x191/0x2a6
                                        [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                        [<ffffffff81ca4d3f>] kernel_init+0xe3/0x168
                                        [<ffffffff8157b2e4>] kernel_thread_helper+0x4/0x10
    IN-SOFTIRQ-W at:
                                        [<ffffffff8109ad5e>] __lock_acquire+0x7ce/0x1e10
                                        [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                        [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                        [<ffffffff81531e9f>] mld_ifc_timer_expire+0xff/0x280
                                        [<ffffffff8106f2a9>] run_timer_softirq+0x179/0x3f0
                                        [<ffffffff810666d0>] __do_softirq+0xc0/0x210
                                        [<ffffffff8157b3dc>] call_softirq+0x1c/0x30
                                        [<ffffffff8100d42d>] do_softirq+0xad/0xe0
                                        [<ffffffff81066afe>] irq_exit+0x9e/0xb0
                                        [<ffffffff8157bd40>] smp_apic_timer_interrupt+0x70/0x9b
                                        [<ffffffff8157ab93>] apic_timer_interrupt+0x13/0x20
                                        [<ffffffff8149d857>] rt_do_flush+0x87/0x2a0
                                        [<ffffffff814a16b6>] rt_cache_flush+0x46/0x60
                                        [<ffffffff814e36e0>] fib_disable_ip+0x40/0x60
                                        [<ffffffff814e5447>] fib_inetaddr_event+0xd7/0xe0
                                        [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
                                        [<ffffffff810896e8>] __blocking_notifier_call_chain+0x78/0xb0
                                        [<ffffffff81089736>] blocking_notifier_call_chain+0x16/0x20
                                        [<ffffffff814d8021>] __inet_del_ifa+0xf1/0x2e0
                                        [<ffffffff814d8223>] inet_del_ifa+0x13/0x20
                                        [<ffffffff814da731>] devinet_ioctl+0x501/0x800
                                        [<ffffffff814db508>] inet_ioctl+0x88/0xa0
                                        [<ffffffff814541f0>] sock_do_ioctl+0x30/0x70
                                        [<ffffffff814542a9>] sock_ioctl+0x79/0x2f0
                                        [<ffffffff81188798>] do_vfs_ioctl+0x98/0x570
                                        [<ffffffff81188d01>] sys_ioctl+0x91/0xa0
                                        [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
    INITIAL USE at:
                                       [<ffffffff8109a9e9>] __lock_acquire+0x459/0x1e10
                                       [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                       [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                       [<ffffffff81532bd5>] igmp6_group_added+0x45/0x1b0
                                       [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
                                       [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
                                       [<ffffffff81ce0d16>] addrconf_init+0x4e/0x183
                                       [<ffffffff81ce0ba1>] inet6_init+0x191/0x2a6
                                       [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                       [<ffffffff81ca4d3f>] kernel_init+0xe3/0x168
                                       [<ffffffff8157b2e4>] kernel_thread_helper+0x4/0x10
  }
  ... key      at: [<ffffffff82801be2>] __key.40877+0x0/0x8
  ... acquired at:
    [<ffffffff810997bc>] check_usage_forwards+0x9c/0x110
    [<ffffffff8109a32c>] mark_lock+0x19c/0x400
    [<ffffffff8109ad5e>] __lock_acquire+0x7ce/0x1e10
    [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
    [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
    [<ffffffff81531e9f>] mld_ifc_timer_expire+0xff/0x280
    [<ffffffff8106f2a9>] run_timer_softirq+0x179/0x3f0
    [<ffffffff810666d0>] __do_softirq+0xc0/0x210
    [<ffffffff8157b3dc>] call_softirq+0x1c/0x30
    [<ffffffff8100d42d>] do_softirq+0xad/0xe0
    [<ffffffff81066afe>] irq_exit+0x9e/0xb0
    [<ffffffff8157bd40>] smp_apic_timer_interrupt+0x70/0x9b
    [<ffffffff8157ab93>] apic_timer_interrupt+0x13/0x20
    [<ffffffff8149d857>] rt_do_flush+0x87/0x2a0
    [<ffffffff814a16b6>] rt_cache_flush+0x46/0x60
    [<ffffffff814e36e0>] fib_disable_ip+0x40/0x60
    [<ffffffff814e5447>] fib_inetaddr_event+0xd7/0xe0
    [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
    [<ffffffff810896e8>] __blocking_notifier_call_chain+0x78/0xb0
    [<ffffffff81089736>] blocking_notifier_call_chain+0x16/0x20
    [<ffffffff814d8021>] __inet_del_ifa+0xf1/0x2e0
    [<ffffffff814d8223>] inet_del_ifa+0x13/0x20
    [<ffffffff814da731>] devinet_ioctl+0x501/0x800
    [<ffffffff814db508>] inet_ioctl+0x88/0xa0
    [<ffffffff814541f0>] sock_do_ioctl+0x30/0x70
    [<ffffffff814542a9>] sock_ioctl+0x79/0x2f0
    [<ffffffff81188798>] do_vfs_ioctl+0x98/0x570
    [<ffffffff81188d01>] sys_ioctl+0x91/0xa0
    [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b

 stack backtrace:
 Pid: 567, comm: ifconfig Not tainted 2.6.39-rc6+ #1
 Call Trace:
  <IRQ>  [<ffffffff810996f6>] print_irq_inversion_bug+0x146/0x170
  [<ffffffff81099720>] ? print_irq_inversion_bug+0x170/0x170
  [<ffffffff810997bc>] check_usage_forwards+0x9c/0x110
  [<ffffffff8109a32c>] mark_lock+0x19c/0x400
  [<ffffffff8109ad5e>] __lock_acquire+0x7ce/0x1e10
  [<ffffffff8109a383>] ? mark_lock+0x1f3/0x400
  [<ffffffff8109b497>] ? __lock_acquire+0xf07/0x1e10
  [<ffffffff81012255>] ? native_sched_clock+0x15/0x70
  [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
  [<ffffffff81531e9f>] ? mld_ifc_timer_expire+0xff/0x280
  [<ffffffff8109759d>] ? lock_release_holdtime+0x3d/0x1a0
  [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
  [<ffffffff81531e9f>] ? mld_ifc_timer_expire+0xff/0x280
  [<ffffffff8157170b>] ? _raw_spin_unlock+0x2b/0x40
  [<ffffffff81531e9f>] mld_ifc_timer_expire+0xff/0x280
  [<ffffffff8106f2a9>] run_timer_softirq+0x179/0x3f0
  [<ffffffff8106f21b>] ? run_timer_softirq+0xeb/0x3f0
  [<ffffffff810122b9>] ? sched_clock+0x9/0x10
  [<ffffffff81531da0>] ? mld_gq_timer_expire+0x30/0x30
  [<ffffffff810666d0>] __do_softirq+0xc0/0x210
  [<ffffffff8109455f>] ? tick_program_event+0x1f/0x30
  [<ffffffff8157b3dc>] call_softirq+0x1c/0x30
  [<ffffffff8100d42d>] do_softirq+0xad/0xe0
  [<ffffffff81066afe>] irq_exit+0x9e/0xb0
  [<ffffffff8157bd40>] smp_apic_timer_interrupt+0x70/0x9b
  [<ffffffff8157ab93>] apic_timer_interrupt+0x13/0x20
  <EOI>  [<ffffffff81571f14>] ? retint_restore_args+0x13/0x13
  [<ffffffff810974a7>] ? lock_is_held+0x17/0xd0
  [<ffffffff8149d857>] rt_do_flush+0x87/0x2a0
  [<ffffffff814a16b6>] rt_cache_flush+0x46/0x60
  [<ffffffff814e36e0>] fib_disable_ip+0x40/0x60
  [<ffffffff814e5447>] fib_inetaddr_event+0xd7/0xe0
  [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
  [<ffffffff810896e8>] __blocking_notifier_call_chain+0x78/0xb0
  [<ffffffff81089736>] blocking_notifier_call_chain+0x16/0x20
  [<ffffffff814d8021>] __inet_del_ifa+0xf1/0x2e0
  [<ffffffff814d8223>] inet_del_ifa+0x13/0x20
  [<ffffffff814da731>] devinet_ioctl+0x501/0x800
  [<ffffffff8108a3af>] ? local_clock+0x6f/0x80
  [<ffffffff81575898>] ? do_page_fault+0x268/0x560
  [<ffffffff814db508>] inet_ioctl+0x88/0xa0
  [<ffffffff814541f0>] sock_do_ioctl+0x30/0x70
  [<ffffffff814542a9>] sock_ioctl+0x79/0x2f0
  [<ffffffff810dfe87>] ? __call_rcu+0xa7/0x190
  [<ffffffff81188798>] do_vfs_ioctl+0x98/0x570
  [<ffffffff8117737e>] ? fget_light+0x33e/0x430
  [<ffffffff81571ef9>] ? retint_swapgs+0x13/0x1b
  [<ffffffff81188d01>] sys_ioctl+0x91/0xa0
  [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
Signed-off-by: NRoland Dreier <roland@purestorage.com>
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NScott J. Goldman <scottjg@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A length of zero (after subtracting two for the type and len fields) for
the DCCPO_{CHANGE,CONFIRM}_{L,R} options will cause an underflow due to
the subtraction.  The subsequent code may read past the end of the
options value buffer when parsing.  I'm unsure of what the consequences
of this might be, but it's probably not good.
Signed-off-by: NDan Rosenberg <drosenberg@vsecurity.com>
Cc: stable@kernel.org
Acked-by: NGerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

RTR frames do have a valid data length code on CAN.
The driver for SJA1000 did not handle that situation properly.
Signed-off-by: NKurt Van Dijck <kurt.van.dijck@eia.be>
Acked-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch makes use of the EVENT_DEV_OPEN flag introduced recently to
fix one out of memory issue, which can be reproduced on omap3/4 based
pandaboard/beagle XM easily with steps below:

	- enable runtime pm
	echo auto > /sys/devices/platform/usbhs-omap.0/ehci-omap.0/usb1/1-1/1-1.1/power/control

	- ifconfig eth0 up

	- then out of memroy happened, see [1] for kernel message.

Follows my analysis:
	- 'ifconfig eth0 up' brings eth0 out of suspend, and usbnet_resume
	is called to schedule dev->bh, then rx urbs are submited to prepare for
	recieving data;

	- some usbnet devices will produce garbage rx packets flood if
	info->reset is not called in usbnet_open.

	- so there is no enough chances for usbnet_bh to handle and release
	recieved skb buffers since many rx interrupts consumes cpu, so out of memory
	for atomic allocation in rx_submit happened.

This patch fixes the issue by simply not allowing schedule of usbnet_bh until device
is opened.

[1], dmesg
[  234.712005] smsc95xx 1-1.1:1.0: rpm_resume flags 0x4
[  234.712066] usb 1-1.1: rpm_resume flags 0x0
[  234.712066] usb 1-1: rpm_resume flags 0x0
[  234.712097] usb usb1: rpm_resume flags 0x0
[  234.712127] usb usb1: usb auto-resume
[  234.712158] ehci-omap ehci-omap.0: resume root hub
[  234.754028] hub 1-0:1.0: hub_resume
[  234.754821] hub 1-0:1.0: port 1: status 0507 change 0000
[  234.756011] hub 1-0:1.0: state 7 ports 3 chg 0000 evt 0000
[  234.756042] hub 1-0:1.0: rpm_resume flags 0x4
[  234.756072] usb usb1: rpm_resume flags 0x0
[  234.756164] usb usb1: rpm_resume returns 1
[  234.756195] hub 1-0:1.0: rpm_resume returns 0
[  234.756195] hub 1-0:1.0: rpm_suspend flags 0x4
[  234.756225] hub 1-0:1.0: rpm_suspend returns 0
[  234.756256] usb usb1: rpm_resume returns 0
[  234.757141] usb 1-1: usb auto-resume
[  234.793151] ehci-omap ehci-omap.0: GetStatus port:1 status 001005 0  ACK POWER sig=se0 PE CONNECT
[  234.816558] usb 1-1: finish resume
[  234.817871] hub 1-1:1.0: hub_resume
[  234.818420] hub 1-1:1.0: port 1: status 0507 change 0000
[  234.820495] ehci-omap ehci-omap.0: reused qh eec50220 schedule
[  234.820495] usb 1-1: link qh256-0001/eec50220 start 1 [1/0 us]
[  234.820587] usb 1-1: rpm_resume returns 0
[  234.820800] hub 1-1:1.0: state 7 ports 5 chg 0000 evt 0000
[  234.820800] hub 1-1:1.0: rpm_resume flags 0x4
[  234.820831] hub 1-1:1.0: rpm_resume returns 0
[  234.820861] hub 1-1:1.0: rpm_suspend flags 0x4
[  234.820861] hub 1-1:1.0: rpm_suspend returns 0
[  234.821777] usb 1-1.1: usb auto-resume
[  234.868591] hub 1-1:1.0: state 7 ports 5 chg 0000 evt 0002
[  234.868591] hub 1-1:1.0: rpm_resume flags 0x4
[  234.868621] hub 1-1:1.0: rpm_resume returns 0
[  234.868652] hub 1-1:1.0: rpm_suspend flags 0x4
[  234.868652] hub 1-1:1.0: rpm_suspend returns 0
[  234.879486] usb 1-1.1: finish resume
[  234.880279] usb 1-1.1: rpm_resume returns 0
[  234.880310] smsc95xx 1-1.1:1.0: rpm_resume returns 0
[  238.880187] ksoftirqd/0: page allocation failure. order:0, mode:0x20
[  238.880218] Backtrace:
[  238.880249] [<c01b9800>] (dump_backtrace+0x0/0xf8) from [<c065e1dc>] (dump_stack+0x18/0x1c)
[  238.880249]  r6:00000000 r5:00000000 r4:00000020 r3:00000002
[  238.880310] [<c065e1c4>] (dump_stack+0x0/0x1c) from [<c026ece4>] (__alloc_pages_nodemask+0x620/0x724)
[  238.880340] [<c026e6c4>] (__alloc_pages_nodemask+0x0/0x724) from [<c02986d4>] (kmem_getpages.clone.34+0x34/0xc8)
[  238.880371] [<c02986a0>] (kmem_getpages.clone.34+0x0/0xc8) from [<c02988f8>] (cache_grow.clone.42+0x84/0x154)
[  238.880371]  r6:ef871aa4 r5:ef871a80 r4:ef81fd40 r3:00000020
[  238.880401] [<c0298874>] (cache_grow.clone.42+0x0/0x154) from [<c0298b64>] (cache_alloc_refill+0x19c/0x1f0)
[  238.880432] [<c02989c8>] (cache_alloc_refill+0x0/0x1f0) from [<c0299804>] (kmem_cache_alloc+0x90/0x190)
[  238.880462] [<c0299774>] (kmem_cache_alloc+0x0/0x190) from [<c052e260>] (__alloc_skb+0x34/0xe8)
[  238.880493] [<c052e22c>] (__alloc_skb+0x0/0xe8) from [<bf0509f4>] (rx_submit+0x2c/0x1d4 [usbnet])
[  238.880523] [<bf0509c8>] (rx_submit+0x0/0x1d4 [usbnet]) from [<bf050d38>] (rx_complete+0x19c/0x1b0 [usbnet])
[  238.880737] [<bf050b9c>] (rx_complete+0x0/0x1b0 [usbnet]) from [<bf006fd0>] (usb_hcd_giveback_urb+0xa8/0xf4 [usbcore])
[  238.880737]  r8:eeeced34 r7:eeecec00 r6:eeecec00 r5:00000000 r4:eec2dd20
[  238.880767] r3:bf050b9c
[  238.880859] [<bf006f28>] (usb_hcd_giveback_urb+0x0/0xf4 [usbcore]) from [<bf03c8f8>] (ehci_urb_done+0xb0/0xbc [ehci_hcd])
[  238.880859]  r6:00000000 r5:eec2dd20 r4:eeeced44 r3:eec2dd34
[  238.880920] [<bf03c848>] (ehci_urb_done+0x0/0xbc [ehci_hcd]) from [<bf040204>] (qh_completions+0x308/0x3bc [ehci_hcd])
[  238.880920]  r7:00000000 r6:eeda21a0 r5:ffdfe3c0 r4:eeda21ac
[  238.880981] [<bf03fefc>] (qh_completions+0x0/0x3bc [ehci_hcd]) from [<bf040ef8>] (scan_async+0xb0/0x16c [ehci_hcd])
[  238.881011] [<bf040e48>] (scan_async+0x0/0x16c [ehci_hcd]) from [<bf040fec>] (ehci_work+0x38/0x90 [ehci_hcd])
[  238.881042] [<bf040fb4>] (ehci_work+0x0/0x90 [ehci_hcd]) from [<bf042940>] (ehci_irq+0x300/0x34c [ehci_hcd])
[  238.881072]  r4:eeeced34 r3:00000001
[  238.881134] [<bf042640>] (ehci_irq+0x0/0x34c [ehci_hcd]) from [<bf006828>] (usb_hcd_irq+0x40/0xac [usbcore])
[  238.881195] [<bf0067e8>] (usb_hcd_irq+0x0/0xac [usbcore]) from [<c0239764>] (handle_irq_event_percpu+0xb8/0x240)
[  238.881225]  r6:eec504e0 r5:0000006d r4:eec504e0 r3:bf0067e8
[  238.881256] [<c02396ac>] (handle_irq_event_percpu+0x0/0x240) from [<c0239930>] (handle_irq_event+0x44/0x64)
[  238.881256] [<c02398ec>] (handle_irq_event+0x0/0x64) from [<c023bbd0>] (handle_level_irq+0xe0/0x114)
[  238.881286]  r6:0000006d r5:c080c14c r4:c080c100 r3:00020000
[  238.881317] [<c023baf0>] (handle_level_irq+0x0/0x114) from [<c01ab090>] (asm_do_IRQ+0x90/0xd0)
[  238.881317]  r5:00000000 r4:0000006d
[  238.881347] [<c01ab000>] (asm_do_IRQ+0x0/0xd0) from [<c06624d0>] (__irq_svc+0x50/0x134)
[  238.881378] Exception stack(0xef837e20 to 0xef837e68)
[  238.881378] 7e20: 00000001 00185610 016cc000 c00490c0 eb380000 ef800540 00000020 00004ae0
[  238.881408] 7e40: 00000020 bf0509f4 60000013 ef837e9c ef837e40 ef837e68 c0226f0c c0298ca0
[  238.881408] 7e60: 20000013 ffffffff
[  238.881408]  r5:fa240100 r4:ffffffff
[  238.881439] [<c0298bb8>] (__kmalloc_track_caller+0x0/0x1d0) from [<c052e284>] (__alloc_skb+0x58/0xe8)
[  238.881469] [<c052e22c>] (__alloc_skb+0x0/0xe8) from [<bf0509f4>] (rx_submit+0x2c/0x1d4 [usbnet])
[  238.881500] [<bf0509c8>] (rx_submit+0x0/0x1d4 [usbnet]) from [<bf0513d8>] (usbnet_bh+0x1b4/0x250 [usbnet])
[  238.881530] [<bf051224>] (usbnet_bh+0x0/0x250 [usbnet]) from [<c01f912c>] (tasklet_action+0xb0/0x1f8)
[  238.881530]  r6:00000000 r5:ef9757f0 r4:ef9757ec r3:bf051224
[  238.881561] [<c01f907c>] (tasklet_action+0x0/0x1f8) from [<c01f97ac>] (__do_softirq+0x140/0x290)
[  238.881561]  r8:00000006 r7:00000101 r6:00000000 r5:c0806098 r4:00000001
[  238.881591] r3:c01f907c
[  238.881622] [<c01f966c>] (__do_softirq+0x0/0x290) from [<c01f99cc>] (run_ksoftirqd+0xd0/0x1f4)
[  238.881622] [<c01f98fc>] (run_ksoftirqd+0x0/0x1f4) from [<c02113b0>] (kthread+0x90/0x98)
[  238.881652]  r7:00000013 r6:c01f98fc r5:00000000 r4:ef831efc
[  238.881683] [<c0211320>] (kthread+0x0/0x98) from [<c01f62f4>] (do_exit+0x0/0x374)
[  238.881713]  r6:c01f62f4 r5:c0211320 r4:ef831efc
[  238.881713] Mem-info:
[  238.881744] Normal per-cpu:
[  238.881744] CPU    0: hi:  186, btch:  31 usd:  38
[  238.881744] CPU    1: hi:  186, btch:  31 usd: 169
[  238.881774] HighMem per-cpu:
[  238.881774] CPU    0: hi:   90, btch:  15 usd:  66
[  238.881774] CPU    1: hi:   90, btch:  15 usd:  86
[  238.881805] active_anon:544 inactive_anon:71 isolated_anon:0
[  238.881805]  active_file:926 inactive_file:2538 isolated_file:0
[  238.881805]  unevictable:0 dirty:10 writeback:0 unstable:0
[  238.881805]  free:57782 slab_reclaimable:864 slab_unreclaimable:186898
[  238.881805]  mapped:632 shmem:144 pagetables:50 bounce:0
[  238.881835] Normal free:1328kB min:3532kB low:4412kB high:5296kB active_anon:0kB inactive_anon:0kB active_file:880kB inactive_file:848kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:780288kB mlocked:0kB dirty:36kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:3456kB slab_unreclaimable:747592kB kernel_stack:392kB pagetables:200kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  238.881866] lowmem_reserve[]: 0 1904 1904
[  238.881896] HighMem free:229800kB min:236kB low:508kB high:784kB active_anon:2176kB inactive_anon:284kB active_file:2824kB inactive_file:9304kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:243712kB mlocked:0kB dirty:4kB writeback:0kB mapped:2528kB shmem:576kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  238.881927] lowmem_reserve[]: 0 0 0
[  238.881958] Normal: 0*4kB 4*8kB 6*16kB 0*32kB 1*64kB 1*128kB 0*256kB 2*512kB 0*1024kB 0*2048kB 0*4096kB = 1344kB
[  238.882019] HighMem: 6*4kB 2*8kB 4*16kB 4*32kB 1*64kB 1*128kB 0*256kB 2*512kB 3*1024kB 0*2048kB 55*4096kB = 229800kB
[  238.882080] 3610 total pagecache pages
[  238.882080] 0 pages in swap cache
[  238.882080] Swap cache stats: add 0, delete 0, find 0/0
[  238.882110] Free swap  = 0kB
[  238.882110] Total swap = 0kB
[  238.933776] 262144 pages of RAM
[  238.933776] 58240 free pages
[  238.933776] 10503 reserved pages
[  238.933776] 187773 slab pages
[  238.933807] 2475 pages shared
[  238.933807] 0 pages swap cached
Signed-off-by: NMing Lei <tom.leiming@gmail.com>
Acked-by: NOliver Neukum <oneukum@suse.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit 4a94445c (net: Use ip_route_input_noref() in input path)
added a bug in IP defragmentation handling, in case timeout is fired.

When a frame is defragmented, we use last skb dst field when building
final skb. Its dst is valid, since we are in rcu read section.

But if a timeout occurs, we take first queued fragment to build one ICMP
TIME EXCEEDED message. Problem is all queued skb have weak dst pointers,
since we escaped RCU critical section after their queueing. icmp_send()
might dereference a now freed (and possibly reused) part of memory.

Calling skb_dst_drop() and ip_route_input_noref() to revalidate route is
the only possible choice.
Reported-by: NDenys Fedoryshchenko <denys@visp.net.lb>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

ctl_table_headers registered with register_net_sysctl_table should
have been unregistered with the equivalent unregister_net_sysctl_table
Signed-off-by: NLucian Adrian Grijincu <lucian.grijincu@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

84c49d8c ("veth: remove unneeded
ifname code from veth_newlink()") caused regression on veth
creation. This patch reverts the original one.
Reported-by: NMichał Mirosław <mirqus@gmail.com>
Signed-off-by: NJiri Pirko <jpirko@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The reset loop check should check the MII_BMCR register value for
BMCR_RESET rather than for MII_BMCR (the register address, which also
happens to be zero).
Signed-off-by: NRabin Vincent <rabin@rab.in>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

tg3 is supposed to enable WoL by default on adapters which support
that, but it fails to do so unless the adapter's
/sys/devices/.../power/wakeup file contains 'enabled' during the
initialization of the adapter.  Fix that by making tg3 use
device_set_wakeup_enable() to enable wakeup automatically whenever
WoL should be enabled by default.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

ioctl() calls against a socket with an inappropriate ioctl operation
are incorrectly returning EINVAL rather than ENOTTY:

  [ENOTTY]
      Inappropriate I/O control operation.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=33992Signed-off-by: NLifeng Sun <lifongsun@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

fib_trie_table() is called during netns creation and
Chromium uses clone(CLONE_NEWNET) to sandbox renderer process.

Don't print anything.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This fixes the following oops discovered by Dan Aloni:
> Anyway, the following is the output of the Oops that I got on the
> Ubuntu kernel on which I first detected the problem
> (2.6.37-12-generic). The Oops that followed will be more useful, I
> guess.

>[ 5594.669852] BUG: unable to handle kernel NULL pointer dereference
> at           (null)
> [ 5594.681606] IP: [<ffffffff81550b7b>] unix_dgram_recvmsg+0x1fb/0x420
> [ 5594.687576] PGD 2a05d067 PUD 2b951067 PMD 0
> [ 5594.693720] Oops: 0002 [#1] SMP
> [ 5594.699888] last sysfs file:

The bug was that unix domain sockets use a pseduo packet for
connecting and accept uses that psudo packet to get the socket.
In the buggy seqpacket case we were allowing unconnected
sockets to call recvmsg and try to receive the pseudo packet.

That is always wrong and as of commit 7361c36c the pseudo
packet had become enough different from a normal packet
that the kernel started oopsing.

Do for seqpacket_recv what was done for seqpacket_send in 2.5
and only allow it on connected seqpacket sockets.

Cc: stable@kernel.org
Tested-by: NDan Aloni <dan@aloni.org>
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support of pause frames advertise in mii_get_an. This provides all drivers
that use mii_ethtool_gset to represent their own and Link partner flow control
abilities in ethtool.
Signed-off-by: NArtem Polyakov <artpol84@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NAdam Jaremko <adam.jaremko@gmail.com>
Acked-by: NPo-Yu Chuang <ratbert@faraday-tech.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Somebody has to do it, however unfortunate be the cause.
Signed-off-by: NOliver Neukum <oneukum@suse.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some newer Huawei devices (T-Mobile Rocket, others) have cdc-ether
compatible ports, so recognize and expose them.
Signed-off-by: NDan Williams <dcbw@redhat.com>
Acked-by: NOliver Neukum <oneukum@suse.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This oops was recently reported to me:

invalid opcode: 0000 [#1] SMP
last sysfs file:
/sys/devices/pci0000:00/0000:00:01.0/0000:01:0d.0/0000:02:05.0/device
CPU 1
Modules linked in: bnx2(+) sunrpc ipv6 dm_mirror dm_region_hash dm_log sg
microcode serio_raw amd64_edac_mod edac_core edac_mce_amd k8temp i2c_piix4
shpchp ext4 mbcache jbd2 sd_mod crc_t10dif mptsas mptscsih mptbase
scsi_transport_sas radeon ttm drm_kms_helper drm hwmon i2c_algo_bit i2c_core
dm_mod [last unloaded: bnx2]

Modules linked in: bnx2(+) sunrpc ipv6 dm_mirror dm_region_hash dm_log sg
microcode serio_raw amd64_edac_mod edac_core edac_mce_amd k8temp i2c_piix4
shpchp ext4 mbcache jbd2 sd_mod crc_t10dif mptsas mptscsih mptbase
scsi_transport_sas radeon ttm drm_kms_helper drm hwmon i2c_algo_bit i2c_core
dm_mod [last unloaded: bnx2]
Pid: 23900, comm: pidof Not tainted 2.6.32-130.el6.x86_64 #1 BladeCenter LS21
-[797251Z]-
RIP: 0010:[<ffffffffa058b270>]  [<ffffffffa058b270>] 0xffffffffa058b270
RSP: 0018:ffff880002083e48  EFLAGS: 00010246
RAX: ffff880002083e90 RBX: ffff88007ccd4000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: dead000000200200 RDI: ffff8800007b8700
RBP: ffff880002083ed0 R08: ffff88000208db40 R09: 0000022d191d27c8
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800007b9bc8
R13: ffff880002083e90 R14: ffff8800007b8700 R15: ffffffffa058b270
FS:  00007fbb3bcf7700(0000) GS:ffff880002080000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001664a98 CR3: 0000000060395000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process pidof (pid: 23900, threadinfo ffff8800007e8000, task ffff8800091c0040)
Stack:
 ffffffff81079f77 ffffffff8109e010 ffff88007ccd5c20 ffff88007ccd5820
<0> ffff88007ccd5420 ffff8800007e9fd8 ffff8800007e9fd8 0000010000000000
<0> ffff88007ccd5020 ffff880002083e90 ffff880002083e90 ffffffff8102a00d
Call Trace:
 <IRQ>
 [<ffffffff81079f77>] ? run_timer_softirq+0x197/0x340
 [<ffffffff8109e010>] ? tick_sched_timer+0x0/0xc0
 [<ffffffff8102a00d>] ? lapic_next_event+0x1d/0x30
 [<ffffffff8106f737>] __do_softirq+0xb7/0x1e0
 [<ffffffff81092cc0>] ? hrtimer_interrupt+0x140/0x250
 [<ffffffff81185f90>] ? filldir+0x0/0xe0
 [<ffffffff8100c2cc>] call_softirq+0x1c/0x30
 [<ffffffff8100df05>] do_softirq+0x65/0xa0
 [<ffffffff8106f525>] irq_exit+0x85/0x90
 [<ffffffff814e3340>] smp_apic_timer_interrupt+0x70/0x9b
 [<ffffffff8100bc93>] apic_timer_interrupt+0x13/0x20
 <EOI>
 [<ffffffff81211ba5>] ? selinux_file_permission+0x45/0x150
 [<ffffffff81262a75>] ? _atomic_dec_and_lock+0x55/0x80
 [<ffffffff812050c6>] security_file_permission+0x16/0x20
 [<ffffffff811861c1>] vfs_readdir+0x71/0xe0
 [<ffffffff81186399>] sys_getdents+0x89/0xf0
 [<ffffffff8100b172>] system_call_fastpath+0x16/0x1b

It occured during some stress testing, in which the reporter was repeatedly
removing and modprobing the bnx2 module while doing various other random
operations on the bnx2 registered net device.  Noting that this error occured on
a serdes based device, we noted that there were a few ethtool operations (most
notably self_test and set_phys_id) that have execution paths that lead into
bnx2_setup_serdes_phy.  This function is notable because it executes a mod_timer
call, which starts the bp->timer running.  Currently bnx2 is setup to assume
that this timer only nees to be stopped when bnx2_close or bnx2_suspend is
called.  Since the above ethtool operations are not gated on the net device
having been opened however, that assumption is incorrect, and can lead to the
timer still running after the module has been removed, leading to the oops above
(as well as other simmilar oopses).

Fix the problem by ensuring that the timer is stopped when pci_device_unregister
is called.
Signed-off-by: NNeil Horman <nhorman@tuxdriver.com>
Reported-by: NHushan Jia <hjia@redhat.com>
CC: Michael Chan <mchan@broadcom.com>
CC: "David S. Miller" <davem@davemloft.net>
Acked-by: NMichael Chan <mchan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Need to use broadcast sta_id for management frames, otherwise we broke
BA session in the firmware and get messages like that:

"Received BA when not expected"

or (on older kernels):

"BA scd_flow 0 does not match txq_id 10"

This fix regression introduced in 2.6.35 during station management
code rewrite by:

commit 2a87c26b
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Fri Apr 30 11:30:45 2010 -0700

    iwlwifi: use iwl_find_station less
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Need to use broadcast sta_id for management frames, otherwise we broke
BA session in the firmware and get messages like that:

"Received BA when not expected"

or (on older kernels):

"BA scd_flow 0 does not match txq_id 10"

This fix regression introduced in 2.6.35 during station management
code rewrite by:

commit 2a87c26b
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Fri Apr 30 11:30:45 2010 -0700

    iwlwifi: use iwl_find_station less

Patch partially resolve:
https://bugzilla.kernel.org/show_bug.cgi?id=16691
However, there are still 11n performance problems on 4965 and 5xxx
devices that need to be investigated.

Cc: stable@kernel.org # 2.6.35+
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Acked-by: NJohannes Berg <johannes@sipsolutions.net>
Acked-by: NWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The 88e6085 has a few differences from the other devices in the port
control registers, causing unknown multicast/broadcast packets to get
dropped when using the standard port setup.

At the same time update kconfig to clarify that the mv88e6085 is now
supported.
Signed-off-by: NPeter Korsgaard <jacmet@sunsite.dk>
Acked-by: NLennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Resubmit interrupt URB if device is open.  Use a flag set in
usbnet_open() to determine this state.  Also kill and free
interrupt URB in usbnet_disconnect().

[Rebased off git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git]
Signed-off-by: NPaul Stewart <pstew@chromium.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix the following:

WARNING: at drivers/net/wireless/iwlegacy/iwl-4965.c:1128 \
iwl4965_send_tx_power+0x61/0x102 [iwl4965]() Hardware name: [...]
TX Power requested while scanning!

Pid: 5723, comm: kworker/u:28 Not tainted 2.6.39-0.rc4.4.fc14.x86_64 #1
Call Trace:
 [<ffffffff8104e27b>] warn_slowpath_common+0x85/0x9d
 [<ffffffffa02782e0>] ? iwl4965_show_temperature+0x49/0x49 [iwl4965]
 [<ffffffff8104e336>] warn_slowpath_fmt+0x46/0x48
 [<ffffffffa027712f>] iwl4965_send_tx_power+0x61/0x102 [iwl4965]
 [<ffffffff81477e05>] ? mutex_lock+0x36/0x50
 [<ffffffffa0278337>] iwl4965_bg_txpower_work+0x57/0x73 [iwl4965]
 [<ffffffff810647f3>] process_one_work+0x18d/0x286
 [<ffffffff81065a5e>] worker_thread+0xfd/0x181
 [<ffffffff81065961>] ? manage_workers.clone.16+0x172/0x172
 [<ffffffff81069036>] kthread+0x82/0x8a
 [<ffffffff81480524>] kernel_thread_helper+0x4/0x10
 [<ffffffff81068fb4>] ? kthread_worker_fn+0x14b/0x14b
 [<ffffffff81480520>] ? gs_change+0x13/0x13
Reported-and-tested-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

commit 5ed540ae change the led behavior
for iwlwifi driver; the side effect cause led blink all the time.

Modify the led blink table to fix this problem
Signed-off-by: NWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

IPsec extended sequence numbers can be used only with the new
anti-replay window implementation. So check if the new implementation
is used if an esn state is inserted and return an error if it is not.
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When we use IPsec extended sequence numbers, we may overwrite
the last scatterlist of the associated data by the scatterlist
for the skb. This patch fixes this by placing the scatterlist
for the skb right behind the last scatterlist of the associated
data. esp4 does it already like that.
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

On replay initialization, we compute the size of the replay
buffer to see if the replay window fits into the buffer.
This computation lacks a mutliplication by 8 because we need
the size in bit, not in byte. So we might return an error
even though the replay window would fit into the buffer.
This patch fixes this issue.
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since commit 62fa8a84 (net: Implement read-only protection and COW'ing
of metrics.) the kernel throws an oops.

[  101.620985] BUG: unable to handle kernel NULL pointer dereference at
           (null)
[  101.621050] IP: [<          (null)>]           (null)
[  101.621084] PGD 6e53c067 PUD 3dd6a067 PMD 0
[  101.621122] Oops: 0010 [#1] SMP
[  101.621153] last sysfs file: /sys/devices/virtual/ppp/ppp/uevent
[  101.621192] CPU 2
[  101.621206] Modules linked in: l2tp_ppp pppox ppp_generic slhc
l2tp_netlink l2tp_core deflate zlib_deflate twofish_x86_64
twofish_common des_generic cbc ecb sha1_generic hmac af_key
iptable_filter snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device loop
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec
snd_pcm snd_timer snd i2c_i801 iTCO_wdt psmouse soundcore snd_page_alloc
evdev uhci_hcd ehci_hcd thermal
[  101.621552]
[  101.621567] Pid: 5129, comm: openl2tpd Not tainted 2.6.39-rc4-Quad #3
Gigabyte Technology Co., Ltd. G33-DS3R/G33-DS3R
[  101.621637] RIP: 0010:[<0000000000000000>]  [<          (null)>]   (null)
[  101.621684] RSP: 0018:ffff88003ddeba60  EFLAGS: 00010202
[  101.621716] RAX: ffff88003ddb5600 RBX: ffff88003ddb5600 RCX:
0000000000000020
[  101.621758] RDX: ffffffff81a69a00 RSI: ffffffff81b7ee61 RDI:
ffff88003ddb5600
[  101.621800] RBP: ffff8800537cd900 R08: 0000000000000000 R09:
ffff88003ddb5600
[  101.621840] R10: 0000000000000005 R11: 0000000000014b38 R12:
ffff88003ddb5600
[  101.621881] R13: ffffffff81b7e480 R14: ffffffff81b7e8b8 R15:
ffff88003ddebad8
[  101.621924] FS:  00007f06e4182700(0000) GS:ffff88007fd00000(0000)
knlGS:0000000000000000
[  101.621971] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  101.622005] CR2: 0000000000000000 CR3: 0000000045274000 CR4:
00000000000006e0
[  101.622046] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[  101.622087] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[  101.622129] Process openl2tpd (pid: 5129, threadinfo
ffff88003ddea000, task ffff88003de9a280)
[  101.622177] Stack:
[  101.622191]  ffffffff81447efa ffff88007d3ded80 ffff88003de9a280
ffff88007d3ded80
[  101.622245]  0000000000000001 ffff88003ddebbb8 ffffffff8148d5a7
0000000000000212
[  101.622299]  ffff88003dcea000 ffff88003dcea188 ffffffff00000001
ffffffff81b7e480
[  101.622353] Call Trace:
[  101.622374]  [<ffffffff81447efa>] ? ipv4_blackhole_route+0x1ba/0x210
[  101.622415]  [<ffffffff8148d5a7>] ? xfrm_lookup+0x417/0x510
[  101.622450]  [<ffffffff8127672a>] ? extract_buf+0x9a/0x140
[  101.622485]  [<ffffffff8144c6a0>] ? __ip_flush_pending_frames+0x70/0x70
[  101.622526]  [<ffffffff8146fbbf>] ? udp_sendmsg+0x62f/0x810
[  101.622562]  [<ffffffff813f98a6>] ? sock_sendmsg+0x116/0x130
[  101.622599]  [<ffffffff8109df58>] ? find_get_page+0x18/0x90
[  101.622633]  [<ffffffff8109fd6a>] ? filemap_fault+0x12a/0x4b0
[  101.622668]  [<ffffffff813fb5c4>] ? move_addr_to_kernel+0x64/0x90
[  101.622706]  [<ffffffff81405d5a>] ? verify_iovec+0x7a/0xf0
[  101.622739]  [<ffffffff813fc772>] ? sys_sendmsg+0x292/0x420
[  101.622774]  [<ffffffff810b994a>] ? handle_pte_fault+0x8a/0x7c0
[  101.622810]  [<ffffffff810b76fe>] ? __pte_alloc+0xae/0x130
[  101.622844]  [<ffffffff810ba2f8>] ? handle_mm_fault+0x138/0x380
[  101.622880]  [<ffffffff81024af9>] ? do_page_fault+0x189/0x410
[  101.622915]  [<ffffffff813fbe03>] ? sys_getsockname+0xf3/0x110
[  101.622952]  [<ffffffff81450c4d>] ? ip_setsockopt+0x4d/0xa0
[  101.622986]  [<ffffffff813f9932>] ? sockfd_lookup_light+0x22/0x90
[  101.623024]  [<ffffffff814b61fb>] ? system_call_fastpath+0x16/0x1b
[  101.623060] Code:  Bad RIP value.
[  101.623090] RIP  [<          (null)>]           (null)
[  101.623125]  RSP <ffff88003ddeba60>
[  101.623146] CR2: 0000000000000000
[  101.650871] ---[ end trace ca3856a7d8e8dad4 ]---
[  101.651011] __sk_free: optmem leakage (160 bytes) detected.

The oops happens in dst_metrics_write_ptr()
include/net/dst.h:124: return dst->ops->cow_metrics(dst, p);

dst->ops->cow_metrics is NULL and causes the oops.

Provide cow_metrics() methods, like we did in commit 214f45c9
(net: provide default_advmss() methods to blackhole dst_ops)
Signed-off-by: NHeld Bernhard <berny156@gmx.de>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The default maximum transmit length for NCM USB frames should be so
that a short packet happens at the end if the device supports a length
greater than the defined maximum. This is achieved by adding 4 bytes
to the maximum length so that the existing logic can fit a short
packet there.
Signed-off-by: NHans Petter Selasky <hselasky@c2i.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The firmware is cached during the first successfull call to open() and
released once the network device is unregistered. The driver uses the
cached firmware between open() and unregister_netdev().

So far the firmware is optional : a failure to load the firmware does
not prevent open() to success. It is thus necessary to 1) unregister
all 816x / 810[23] devices and 2) force a driver probe to issue a new
firmware load.
Signed-off-by: NFrancois Romieu <romieu@fr.zoreil.com>
Fixed-by: NCiprian Docan <docan@eden.rutgers.edu>
Cc: Realtek linux nic maintainers <nic_swsd@realtek.com>

Fixed packets parameters for FW in UDP checksum offload flow.

Do not dereference TCP headers on non TCP frames.
Reported-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: NEilon Greenstein <eilong@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A deadlock was reported to me recently that occured when netconsole was being
used in a virtual guest.  If the virtio_net driver was removed while netconsole
was setup to use an interface that was driven by that driver, the guest
deadlocked.  No backtrace was provided because netconsole was the only console
configured, but it became clear pretty quickly what the problem was.  In
netconsole_netdev_event, if we get an unregister event, we call
__netpoll_cleanup with the target_list_lock held and irqs disabled.
__netpoll_cleanup can, if pending netpoll packets are waiting call
cancel_delayed_work_sync, which is a sleeping path.  the might_sleep call in
that path gets triggered, causing a console warning to be issued.  The
netconsole write handler of course tries to take the target_list_lock again,
which we already hold, causing deadlock.

The fix is pretty striaghtforward.  Simply drop the target_list_lock and
re-enable irqs prior to calling __netpoll_cleanup, the re-acquire the lock, and
restart the loop.  Confirmed by myself to fix the problem reported.
Signed-off-by: NNeil Horman <nhorman@tuxdriver.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This reverts commit 1e253c3b.

It breaks 802.3ad bonding inside of a bridge.

The commit was meant to support transport bridging, and specifically
virtual machines bridged to an ethernet interface connected to a
switch port wiht 802.1x enabled.

But this isn't the way to do it, it breaks too many other things.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The mechanism used to initiate work events from the interrupt
handler has a classic read/modify/write race between the interrupt
handler that sets the condition, and the worker task that reads and
clears the condition. Close these races by using atomic
bit fields.

Cc: stable@kernel.org
Cc: Jie Yang <jie.yang@atheros.com>
Signed-off-by: NTim Gardner <tim.gardner@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>