Kernel panic when running this kernel on Ubuntu 1604 on HyperV with Mellanox CX3 SR-IOV enabled.
Could you please build a test kernel based on this one (test kernel 4.4.0-65): 

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1667007
http://kernel.ubuntu.com/~jsalisbury/lp1667007/xenial/




[    7.976040] Modules linked in: mlx4_core(+) pci_hyperv i2c_piix4 8250_fintek hyperv_fb hv_ballo                          on input_leds joydev serio_raw mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr is                          csi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi parport_pc ppdev lp parport autofs4 btrfs raid1                          0 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1                           raid0 multipath linear hid_generic hyperv_keyboard crct10dif_pclmul crc32_pclmul hid_hyperv hv_net                          vsc hv_storvsc hid scsi_transport_fc ghash_clmulni_intel hv_utils aesni_intel aes_x86_64 lrw gf128                          mul glue_helper ablk_helper cryptd psmouse tulip pata_acpi hv_vmbus floppy fjes
[    7.976040] CPU: 0 PID: 668 Comm: systemd-udevd Tainted: G    B D         4.4.0-64-generic #85~                          lp1667527
[    7.976041] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090006                            04/28/2016
[    7.976042]  0000000000000286 0000000096836efa ffff8800f277f1e8 ffffffff813f8083
[    7.976043]  ffffea0003a87500 ffffffff81cd75a2 ffff8800f277f210 ffffffff811937ee
[    7.976043]  ffffea0003a87540 ffff880107ffbf80 ffff8800f277f320 ffff8800f277f2d8
[    7.976044] Call Trace:
[    7.976044]  [<ffffffff813f8083>] dump_stack+0x63/0x90
[    7.976045]  [<ffffffff811937ee>] bad_page.part.68+0xae/0x100
[    7.976046]  [<ffffffff81197c86>] get_page_from_freelist+0x516/0xa50
[    7.976048]  [<ffffffff81198f19>] __alloc_pages_nodemask+0x159/0x2a0
[    7.976049]  [<ffffffff811e2a7c>] alloc_pages_current+0x8c/0x110
[    7.976050]  [<ffffffff8119354e>] __get_free_pages+0xe/0x40
[    7.976051]  [<ffffffff811beba4>] __tlb_remove_page+0x54/0xa0
[    7.976053]  [<ffffffff811bfa9e>] unmap_page_range+0x50e/0x7a0
[    7.976054]  [<ffffffff811bfdad>] unmap_single_vma+0x7d/0xe0
[    7.976055]  [<ffffffff811c0871>] unmap_vmas+0x51/0xa0
[    7.976056]  [<ffffffff811c9df7>] exit_mmap+0xa7/0x170
[    7.976057]  [<ffffffff8107e0a7>] mmput+0x57/0x130
[    7.976058]  [<ffffffff81083f2a>] do_exit+0x27a/0xb00
[    7.976059]  [<ffffffff81031c41>] oops_end+0xa1/0xd0
[    7.976060]  [<ffffffff810320fb>] die+0x4b/0x70
[    7.976061]  [<ffffffff8102f121>] do_trap+0xb1/0x140
[    7.976062]  [<ffffffff8102f4a9>] do_error_trap+0x89/0x110
[    7.976063]  [<ffffffff811edef7>] ? kfree+0x147/0x150
[    7.976064]  [<ffffffff81558c5e>] ? dev_printk_emit+0x4e/0x70
[    7.976068]  [<ffffffffc0443c0d>] ? mlx4_free_eq+0x11d/0x190 [mlx4_core]
[    7.976069]  [<ffffffff8102fa10>] do_invalid_op+0x20/0x30
[    7.976070]  [<ffffffff8183e10e>] invalid_op+0x1e/0x30
[    7.976074]  [<ffffffffc0443c0d>] ? mlx4_free_eq+0x11d/0x190 [mlx4_core]
[    7.976075]  [<ffffffff811edef7>] ? kfree+0x147/0x150
[    7.976079]  [<ffffffffc0443c0d>] mlx4_free_eq+0x11d/0x190 [mlx4_core]
[    7.976083]  [<ffffffffc04443f2>] mlx4_init_eq_table+0x2b2/0x630 [mlx4_core]
[    7.976087]  [<ffffffffc044efe8>] mlx4_setup_hca+0x1f8/0x7a0 [mlx4_core]
[    7.976091]  [<ffffffffc04502d0>] mlx4_load_one+0xb60/0x1680 [mlx4_core]
[    7.976095]  [<ffffffffc0451312>] mlx4_init_one+0x522/0x6c0 [mlx4_core]
[    7.976097]  [<ffffffff8144a075>] local_pci_probe+0x45/0xa0
[    7.976098]  [<ffffffff8144b4b3>] pci_device_probe+0x103/0x150
[    7.976099]  [<ffffffff8155d4c2>] driver_probe_device+0x222/0x4a0
[    7.976100]  [<ffffffff8155d7c4>] __driver_attach+0x84/0x90
[    7.976102]  [<ffffffff8155d740>] ? driver_probe_device+0x4a0/0x4a0
[    7.976103]  [<ffffffff8155b0ec>] bus_for_each_dev+0x6c/0xc0
[    7.976104]  [<ffffffff8155cc7e>] driver_attach+0x1e/0x20
[    7.976105]  [<ffffffff8155c7bb>] bus_add_driver+0x1eb/0x280
[    7.976105]  [<ffffffffc03be000>] ? 0xffffffffc03be000
[    7.976106]  [<ffffffff8155e0d0>] driver_register+0x60/0xe0
[    7.976107]  [<ffffffff8144999c>] __pci_register_driver+0x4c/0x50
[    7.976113]  [<ffffffffc03be115>] mlx4_init+0x115/0x1000 [mlx4_core]
[    7.976113]  [<ffffffff81002123>] do_one_initcall+0xb3/0x200
[    7.976115]  [<ffffffff811ed0f3>] ? kmem_cache_alloc_trace+0x183/0x1f0
[    7.976116]  [<ffffffff8118dae3>] do_init_module+0x5f/0x1cf
[    7.976117]  [<ffffffff8110a94f>] load_module+0x166f/0x1c10
[    7.976118]  [<ffffffff81106ef0>] ? __symbol_put+0x60/0x60
[    7.976119]  [<ffffffff81214cf0>] ? kernel_read+0x50/0x80
[    7.976120]  [<ffffffff8110b134>] SYSC_finit_module+0xb4/0xe0
[    7.976121]  [<ffffffff8110b17e>] SyS_finit_module+0xe/0x10
[    7.976122]  [<ffffffff8183c5f2>] entry_SYSCALL_64_fastpath+0x16/0x71
[    7.976123] BUG: Bad page state in process systemd-udevd  pfn:ea1d3
[    7.976123] page:ffffea0003a874c0 count:-1 mapcount:0 mapping:          (null) index:0x0
[    7.976124] flags: 0xffffc000000000()
[    7.976124] page dumped because: nonzero _count