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[Eric Desrochers <eric.desrochers@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Eric Desrochers (slashd)

** Changed in: linux (Ubuntu)
     Assignee: Eric Desrochers (slashd) => (unassigned)

** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1650635

Title:
  vmxnet3 driver could causes kernel panic with v4.4 if LRO enabled.

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  In Progress

Bug description:
  It has been brought to my attention that a Trusty Vmware Virtual
  Machine running kernel v4.4.0-36 crashed with the following stacktrace
  :

  PANIC: "kernel BUG at /build/linux-lts-xenial-QiVniY/linux-lts-xenial-4.4.0/drivers/net/vmxnet3/vmxnet3_drv.c:1353!" 
  ...
  #0 [ffff88042d683aa0] machine_kexec at ffffffff8105987c
  #1 [ffff88042d683af8] crash_kexec at ffffffff81105d23
  #2 [ffff88042d683bc0] oops_end at ffffffff81030a79
  #3 [ffff88042d683be8] die at ffffffff81030f7b
  #4 [ffff88042d683c18] do_trap at ffffffff8102e04d
  #5 [ffff88042d683c68] do_error_trap at ffffffff8102e5a7
  #6 [ffff88042d683d20] do_invalid_op at ffffffff8102e840
  #7 [ffff88042d683d30] invalid_op at ffffffff817f900e
  [exception RIP: vmxnet3_rq_rx_complete+3016]
  RIP: ffffffffc004e448 RSP: ffff88042d683de8 RFLAGS: 00010246
  RAX: 0000000000000001 RBX: ffff880424099668 RCX: 0000000000000000
  RDX: 00000000000005f2 RSI: 00000000000005f2 RDI: ffff88042a61f400
  RBP: ffff88042d683e50 R8: 0000000000000000 R9: 0000000000000000
  R10: ffff88042902b470 R11: ffff8804293406a8 R12: ffff880424098840
  R13: ffff880424099580 R14: ffff88042a61ec00 R15: ffff88042933ae00
  ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000
  #8 [ffff88042d683de0] vmxnet3_rq_rx_complete at ffffffffc004dcfa [vmxnet3]
  #9 [ffff88042d683e58] vmxnet3_poll_rx_only at ffffffffc004e60a [vmxnet3]
  #10 [ffff88042d683e90] net_rx_action at ffffffff816f3544
  #11 [ffff88042d683f00] __do_softirq at ffffffff81081e7d
  #12 [ffff88042d683f68] irq_exit at ffffffff81082255
  #13 [ffff88042d683f78] do_IRQ at ffffffff817f9ee6
  --- <IRQ stack> ---
  #14 [ffff880426c73f30] ret_from_intr at ffffffff817f7fc2
  [exception RIP: unknown or invalid address]
  RIP: fffffffffffffffb RSP: 00007fe17e59bf48 RFLAGS: 00000001
  RAX: 00007fe18564ed58 RBX: 00007fe2064ce848 RCX: 00007fe185612d60
  RDX: 00007fe20b47eb30 RSI: 00007fe185640d38 RDI: 00007fe18564ed50
  RBP: ffffffff817f7fe5 R8: 00007fe185100068 R9: 0000000000037ce0
  R10: 0000000000134ad8 R11: 00007fe17e4b7028 R12: 00007fe185100068
  R13: 00007fe185632380 R14: 0000000000000000 R15: ffffffff81003a64
  ORIG_RAX: 0000000000000001 CS: 7fe185640d38 SS: ffffffffffffff91
  bt: WARNING: possibly bogus exception frame
  RIP: 00000000004e92bb RSP: 00007fe20b47ea40 RFLAGS: 00000283
  RAX: 0000000000000001 RBX: 00007fe18564ed58 RCX: fffffffffffffffb
  RDX: 00007fe185640d38 RSI: 0000000000000001 RDI: 00007fe17e59bf48
  RBP: 00007fe185100068 R8: 00007fe18564ed50 R9: 00007fe185640d38
  R10: 00007fe20b47eb30 R11: 00007fe185612d60 R12: 0000000000037ce0
  R13: 0000000000134ad8 R14: 00007fe17e4b7028 R15: 00007fe2064ce848
  ORIG_RAX: ffffffffffffff91 CS: 0033 SS: 002b

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