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apport-collect 1771679

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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1771679

Title:
  Kernel panic on boot (m1.small in cn-north-1)

Status in linux package in Ubuntu:
  Incomplete
Status in linux-aws package in Ubuntu:
  New
Status in linux source package in Bionic:
  In Progress
Status in linux-aws source package in Bionic:
  In Progress

Bug description:
  We're observing the following panic on boot when trying to boot an
  m1.small in cn-north-1 (which is a region in AWS China):

  [    2.271681] Hardware name: Xen HVM domU, BIOS 3.4.3.amazon 11/11/2016
  [    2.271681] RIP: 0010:__xen_evtchn_do_upcall+0x24/0x80
  [    2.271681] RSP: 0000:ffff8e21aa003ea0 EFLAGS: 00010046
  [    2.271681] RAX: ffffffff9dd82920 RBX: ffffffffff200000 RCX: 
000000008728b34e
  [    2.271681] RDX: ffff8e21a3252800 RSI: ffff8e21a724e000 RDI: 
000000000000001c
  [    2.271681] RBP: ffff8e21aa003eb8 R08: ffffffff9ea05040 R09: 
0000000000000000
  [    2.271681] R10: ffff8e21aa003f28 R11: 0000000000000000 R12: 
0000000000000001
  [    2.271681] R13: 0000000000000000 R14: 0000000000000022 R15: 
ffff8e21a3246900
  [    2.271681] FS:  0000000000000000(0000) GS:ffff8e21aa000000(0000) 
knlGS:0000000000000000
  [    2.271681] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [    2.271681] CR2: ffffffffff200000 CR3: 000000000b80a000 CR4: 
00000000000006f0
  [    2.271681] Call Trace:
  [    2.271681]  <IRQ>
  [    2.271681]  xen_hvm_evtchn_do_upcall+0xe/0x10
  [    2.271681]  do_hvm_evtchn_intr+0xe/0x20
  [    2.271681]  __handle_irq_event_percpu+0x44/0x1a0
  [    2.271681]  handle_irq_event_percpu+0x32/0x80
  [    2.271681]  handle_irq_event+0x3b/0x60
  [    2.271681]  handle_fasteoi_irq+0x75/0x130
  [    2.271681]  handle_irq+0x20/0x30
  [    2.271681]  do_IRQ+0x46/0xd0
  [    2.271681]  common_interrupt+0x84/0x84
  [    2.271681]  </IRQ>
  [    2.271681] RIP: 0010:native_safe_halt+0x6/0x10
  [    2.271681] RSP: 0000:ffffffff9ea03e28 EFLAGS: 00000246 ORIG_RAX: 
ffffffffffffffdd
  [    2.271681] RAX: ffffffff9e12fba0 RBX: 0000000000000000 RCX: 
0000000000000000
  [    2.271681] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 
0000000000000000
  [    2.271681] RBP: ffffffff9ea03e28 R08: 0000000000000002 R09: 
ffffffff9ea03e18
  [    2.271681] R10: ffffffff9ea03da0 R11: 00000000eb8a1d25 R12: 
0000000000000000
  [    2.271681] R13: 0000000000000000 R14: 0000000000000000 R15: 
0000000000000000
  [    2.271681]  ? __cpuidle_text_start+0x8/0x8
  [    2.271681]  default_idle+0x20/0x100
  [    2.271681]  arch_cpu_idle+0x15/0x20
  [    2.271681]  default_idle_call+0x23/0x30
  [    2.271681]  do_idle+0x17f/0x1b0
  [    2.271681]  cpu_startup_entry+0x73/0x80
  [    2.271681]  rest_init+0xae/0xb0
  [    2.271681]  start_kernel+0x4dc/0x4fd
  [    2.271681]  x86_64_start_reservations+0x24/0x26
  [    2.271681]  x86_64_start_kernel+0x74/0x77
  [    2.271681]  secondary_startup_64+0xa5/0xb0
  [    2.271681] Code: 1f 84 00 00 00 00 00 66 66 66 66 90 55 48 89 e5 41 55 41 
54 53 65 48 8b 1d 92 dc 29 62 41 bc 01 00 00 00 65 44 8b 2d 8c 8c 29 62 <c6> 03 
00 44 89 e0 65 0f c1 05 2e 96 2a 62 85 c0 75 3b 48 8b 05 
  [    2.271681] RIP: __xen_evtchn_do_upcall+0x24/0x80 RSP: ffff8e21aa003ea0
  [    2.271681] CR2: ffffffffff200000
  [    2.271681] ---[ end trace 956d0f4244642614 ]---
  [    2.271681] Kernel panic - not syncing: Fatal exception in interrupt

  I've attached the full console log.

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