1. 25 Jul, 2018 31 commits
  2. 24 Jul, 2018 9 commits
    • Shubhrajyoti Datta's avatar
      net: axienet: Fix double deregister of mdio · 03bc7cab
      Shubhrajyoti Datta authored
      If the registration fails then mdio_unregister is called.
      However at unbind the unregister ia attempted again resulting
      in the below crash
      
      [   73.544038] kernel BUG at drivers/net/phy/mdio_bus.c:415!
      [   73.549362] Internal error: Oops - BUG: 0 [#1] SMP
      [   73.554127] Modules linked in:
      [   73.557168] CPU: 0 PID: 2249 Comm: sh Not tainted 4.14.0 #183
      [   73.562895] Hardware name: xlnx,zynqmp (DT)
      [   73.567062] task: ffffffc879e41180 task.stack: ffffff800cbe0000
      [   73.572973] PC is at mdiobus_unregister+0x84/0x88
      [   73.577656] LR is at axienet_mdio_teardown+0x18/0x30
      [   73.582601] pc : [<ffffff80085fa4cc>] lr : [<ffffff8008616858>]
      pstate: 20000145
      [   73.589981] sp : ffffff800cbe3c30
      [   73.593277] x29: ffffff800cbe3c30 x28: ffffffc879e41180
      [   73.598573] x27: ffffff8008a21000 x26: 0000000000000040
      [   73.603868] x25: 0000000000000124 x24: ffffffc879efe920
      [   73.609164] x23: 0000000000000060 x22: ffffffc879e02000
      [   73.614459] x21: ffffffc879e02800 x20: ffffffc87b0b8870
      [   73.619754] x19: ffffffc879e02800 x18: 000000000000025d
      [   73.625050] x17: 0000007f9a719ad0 x16: ffffff8008195bd8
      [   73.630345] x15: 0000007f9a6b3d00 x14: 0000000000000010
      [   73.635640] x13: 74656e7265687465 x12: 0000000000000030
      [   73.640935] x11: 0000000000000030 x10: 0101010101010101
      [   73.646231] x9 : 241f394f42533300 x8 : ffffffc8799f6e98
      [   73.651526] x7 : ffffffc8799f6f18 x6 : ffffffc87b0ba318
      [   73.656822] x5 : ffffffc87b0ba498 x4 : 0000000000000000
      [   73.662117] x3 : 0000000000000000 x2 : 0000000000000008
      [   73.667412] x1 : 0000000000000004 x0 : ffffffc8799f4000
      [   73.672708] Process sh (pid: 2249, stack limit = 0xffffff800cbe0000)
      
      Fix the same by making the bus NULL on unregister.
      Signed-off-by: default avatarShubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      03bc7cab
    • Aleksander Morgado's avatar
      qmi_wwan: fix interface number for DW5821e production firmware · f25e1392
      Aleksander Morgado authored
      The original mapping for the DW5821e was done using a development
      version of the firmware. Confirmed with the vendor that the final
      USB layout ends up exposing the QMI control/data ports in USB
      config #1, interface #0, not in interface #1 (which is now a HID
      interface).
      
      T:  Bus=01 Lev=03 Prnt=04 Port=00 Cnt=01 Dev#= 16 Spd=480 MxCh= 0
      D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  2
      P:  Vendor=413c ProdID=81d7 Rev=03.18
      S:  Manufacturer=DELL
      S:  Product=DW5821e Snapdragon X20 LTE
      S:  SerialNumber=0123456789ABCDEF
      C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
      I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
      I:  If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
      I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
      I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
      I:  If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
      I:  If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
      
      Fixes: e7e197ed ("qmi_wwan: add support for the Dell Wireless 5821e module")
      Signed-off-by: default avatarAleksander Morgado <aleksander@aleksander.es>
      Acked-by: default avatarBjørn Mork <bjorn@mork.no>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f25e1392
    • Willem de Bruijn's avatar
      ip: in cmsg IP(V6)_ORIGDSTADDR call pskb_may_pull · 2efd4fca
      Willem de Bruijn authored
      Syzbot reported a read beyond the end of the skb head when returning
      IPV6_ORIGDSTADDR:
      
        BUG: KMSAN: kernel-infoleak in put_cmsg+0x5ef/0x860 net/core/scm.c:242
        CPU: 0 PID: 4501 Comm: syz-executor128 Not tainted 4.17.0+ #9
        Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
        Google 01/01/2011
        Call Trace:
          __dump_stack lib/dump_stack.c:77 [inline]
          dump_stack+0x185/0x1d0 lib/dump_stack.c:113
          kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1125
          kmsan_internal_check_memory+0x138/0x1f0 mm/kmsan/kmsan.c:1219
          kmsan_copy_to_user+0x7a/0x160 mm/kmsan/kmsan.c:1261
          copy_to_user include/linux/uaccess.h:184 [inline]
          put_cmsg+0x5ef/0x860 net/core/scm.c:242
          ip6_datagram_recv_specific_ctl+0x1cf3/0x1eb0 net/ipv6/datagram.c:719
          ip6_datagram_recv_ctl+0x41c/0x450 net/ipv6/datagram.c:733
          rawv6_recvmsg+0x10fb/0x1460 net/ipv6/raw.c:521
          [..]
      
      This logic and its ipv4 counterpart read the destination port from
      the packet at skb_transport_offset(skb) + 4.
      
      With MSG_MORE and a local SOCK_RAW sender, syzbot was able to cook a
      packet that stores headers exactly up to skb_transport_offset(skb) in
      the head and the remainder in a frag.
      
      Call pskb_may_pull before accessing the pointer to ensure that it lies
      in skb head.
      
      Link: http://lkml.kernel.org/r/CAF=yD-LEJwZj5a1-bAAj2Oy_hKmGygV6rsJ_WOrAYnv-fnayiQ@mail.gmail.com
      Reported-by: syzbot+9adb4b567003cac781f0@syzkaller.appspotmail.com
      Signed-off-by: default avatarWillem de Bruijn <willemb@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2efd4fca
    • Sudarsana Reddy Kalluru's avatar
      bnx2x: Fix invalid memory access in rss hash config path. · ae2dcb28
      Sudarsana Reddy Kalluru authored
      Rx hash/filter table configuration uses rss_conf_obj to configure filters
      in the hardware. This object is initialized only when the interface is
      brought up.
      This patch adds driver changes to configure rss params only when the device
      is in opened state. In port disabled case, the config will be cached in the
      driver structure which will be applied in the successive load path.
      
      Please consider applying it to 'net' branch.
      Signed-off-by: default avatarSudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ae2dcb28
    • Jack Morgenstein's avatar
      net/mlx4_core: Save the qpn from the input modifier in RST2INIT wrapper · 958c696f
      Jack Morgenstein authored
      Function mlx4_RST2INIT_QP_wrapper saved the qp number passed in the qp
      context, rather than the one passed in the input modifier.
      
      However, the qp number in the qp context is not defined as a
      required parameter by the FW. Therefore, drivers may choose to not
      specify the qp number in the qp context for the reset-to-init transition.
      
      Thus, we must save the qp number passed in the command input modifier --
      which is always present. (This saved qp number is used as the input
      modifier for command 2RST_QP when a slave's qp's are destroyed).
      
      Fixes: c82e9aa0 ("mlx4_core: resource tracking for HCA resources used by guests")
      Signed-off-by: default avatarJack Morgenstein <jackm@dev.mellanox.co.il>
      Signed-off-by: default avatarTariq Toukan <tariqt@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      958c696f
    • Nishanth Devarajan's avatar
      net/sched: add skbprio scheduler · aea5f654
      Nishanth Devarajan authored
      Skbprio (SKB Priority Queue) is a queueing discipline that prioritizes packets
      according to their skb->priority field. Under congestion, already-enqueued lower
      priority packets will be dropped to make space available for higher priority
      packets. Skbprio was conceived as a solution for denial-of-service defenses that
      need to route packets with different priorities as a means to overcome DoS
      attacks.
      
      v5
      *Do not reference qdisc_dev(sch)->tx_queue_len for setting limit. Instead set
      default sch->limit to 64.
      
      v4
      *Drop Documentation/networking/sch_skbprio.txt doc file to move it to tc man
      page for Skbprio, in iproute2.
      
      v3
      *Drop max_limit parameter in struct skbprio_sched_data and instead use
      sch->limit.
      
      *Reference qdisc_dev(sch)->tx_queue_len only once, during initialisation for
      qdisc (previously being referenced every time qdisc changes).
      
      *Move qdisc's detailed description from in-code to Documentation/networking.
      
      *When qdisc is saturated, enqueue incoming packet first before dequeueing
      lowest priority packet in queue - improves usage of call stack registers.
      
      *Introduce and use overlimit stat to keep track of number of dropped packets.
      
      v2
      *Use skb->priority field rather than DS field. Rename queueing discipline as
      SKB Priority Queue (previously Gatekeeper Priority Queue).
      
      *Queueing discipline is made classful to expose Skbprio's internal priority
      queues.
      Signed-off-by: default avatarNishanth Devarajan <ndev2021@gmail.com>
      Reviewed-by: default avatarSachin Paryani <sachin.paryani@gmail.com>
      Reviewed-by: default avatarCody Doucette <doucette@bu.edu>
      Reviewed-by: default avatarMichel Machado <michel@digirati.com.br>
      Acked-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      aea5f654
    • Heiner Kallweit's avatar
      net: phy: add GBit master / slave error detection · b8f8c8eb
      Heiner Kallweit authored
      Certain PHY's have issues when operating in GBit slave mode and can
      be forced to master mode. Examples are RTL8211C, also the Micrel PHY
      driver has a DT setting to force master mode.
      If two such chips are link partners the autonegotiation will fail.
      Standard defines a self-clearing on read, latched-high bit to
      indicate this error. Check this bit to inform the user.
      Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b8f8c8eb
    • David S. Miller's avatar
      Merge branch 'net-whitespace-cleanups' · 7836899c
      David S. Miller authored
      Stephen Hemminger says:
      
      ====================
      net whitespace cleanups
      
      Ran script that I use to check for trailing whitespace and
      blank lines at end of files across all files in net/ directory.
      These are errors that checkpatch reports and git flags.
      
      These are the resulting fixes broken up mostly by subsystem.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7836899c
    • Stephen Hemminger's avatar
      net: remove blank lines at end of file · e446a276
      Stephen Hemminger authored
      Several files have extra line at end of file.
      Signed-off-by: default avatarStephen Hemminger <stephen@networkplumber.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e446a276