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[Stefan Bader <1896725@xxxxxxxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/1896725

Title:
  xenial 4.4.0-191-generic in -proposed has a regression

Status in ubuntu-kernel-tests:
  Confirmed
Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Confirmed

Bug description:
  [Impact]

  The new xenial kernel in -proposed, 4.4.0-191-generic, and its
  derivatives, such as 4.4.0-1115-aws suffer a kernel panic on boot on
  AWS.

  I tested t2.micro and t2.medium, it happens every time. Simply install
  the kernel from -proposed and reboot, we get the following oops:

  [    0.549557] BUG: unable to handle kernel paging request at ffffffffff5f3000
  [    0.552000] IP: [<ffffffff810592ff>] mp_irqdomain_activate+0x5f/0xa0
  [    0.552000] PGD 1e0f067 PUD 1e11067 PMD 1e12067 PTE 0
  [    0.552000] Oops: 0002 [#1] SMP 
  [    0.552000] Modules linked in:
  [    0.552000] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.4.0-191-generic #221-Ubuntu
  [    0.552000] Hardware name: Xen HVM domU, BIOS 4.2.amazon 08/24/2006
  [    0.552000] task: ffff88010a0f0000 ti: ffff88010a0f8000 task.ti: ffff88010a0f8000
  [    0.552000] RIP: 0010:[<ffffffff810592ff>]  [<ffffffff810592ff>] mp_irqdomain_activate+0x5f/0xa0
  [    0.552000] RSP: 0000:ffff88010a0fbc48  EFLAGS: 00010086
  [    0.552000] RAX: 0000000000000086 RBX: ffff88010a1df480 RCX: 0000000000000000
  [    0.552000] RDX: ffffffffff5f3000 RSI: 0000000000000001 RDI: 000000000020c000
  [    0.552000] RBP: ffff88010a0fbc50 R08: ffffffff81ebdfd0 R09: 00000000ffffffff
  [    0.552000] R10: 0000000000000011 R11: 0000000000000009 R12: ffff88010ad95400
  [    0.552000] R13: 0000000000000001 R14: 0000000000000009 R15: ffff88010a1fc480
  [    0.552000] FS:  0000000000000000(0000) GS:ffff88010b240000(0000) knlGS:0000000000000000
  [    0.552000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [    0.552000] CR2: ffffffffff5f3000 CR3: 0000000001e0a000 CR4: 0000000000160670
  [    0.552000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  [    0.552000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  [    0.552000] Stack:
  [    0.552000]  ffff88010ac0ba58 ffff88010a0fbc70 ffffffff810ea644 ffff88010ac0ba00
  [    0.552000]  ffff88010ac0ba58 ffff88010a0fbca0 ffffffff810e6d88 ffffffff810e1009
  [    0.552000]  ffff88010ac0ba00 ffff88010ac0baa0 ffff88010a1fc480 ffff88010a0fbd38
  [    0.552000] Call Trace:
  [    0.552000]  [<ffffffff810ea644>] irq_domain_activate_irq+0x44/0x50
  [    0.552000]  [<ffffffff810e6d88>] irq_startup+0x38/0x90
  [    0.552000]  [<ffffffff810e1009>] ? vprintk_default+0x29/0x40
  [    0.552000]  [<ffffffff810e55e2>] __setup_irq+0x5a2/0x650
  [    0.552000]  [<ffffffff811fc064>] ? kmem_cache_alloc_trace+0x1d4/0x1f0
  [    0.552000]  [<ffffffff814a3870>] ? acpi_osi_handler+0xb0/0xb0
  [    0.552000]  [<ffffffff810e582b>] request_threaded_irq+0xfb/0x1a0
  [    0.552000]  [<ffffffff814a3870>] ? acpi_osi_handler+0xb0/0xb0
  [    0.552000]  [<ffffffff814bf624>] ? acpi_ev_sci_dispatch+0x64/0x64
  [    0.552000]  [<ffffffff814a3f0a>] acpi_os_install_interrupt_handler+0xaa/0x100
  [    0.552000]  [<ffffffff81fb26e1>] ? acpi_sleep_proc_init+0x28/0x28
  [    0.552000]  [<ffffffff814bf689>] acpi_ev_install_sci_handler+0x23/0x25
  [    0.552000]  [<ffffffff814bcf03>] acpi_ev_install_xrupt_handlers+0x1c/0x6c
  [    0.552000]  [<ffffffff81fb3e9d>] acpi_enable_subsystem+0x8f/0x93
  [    0.552000]  [<ffffffff81fb276c>] acpi_init+0x8b/0x2c4
  [    0.552000]  [<ffffffff8141ee1e>] ? kasprintf+0x4e/0x70
  [    0.552000]  [<ffffffff81fb26e1>] ? acpi_sleep_proc_init+0x28/0x28
  [    0.552000]  [<ffffffff810021f5>] do_one_initcall+0xb5/0x200
  [    0.552000]  [<ffffffff810a6fda>] ? parse_args+0x29a/0x4a0
  [    0.552000]  [<ffffffff81f69152>] kernel_init_freeable+0x177/0x218
  [    0.552000]  [<ffffffff8185dcf0>] ? rest_init+0x80/0x80
  [    0.552000]  [<ffffffff8185dcfe>] kernel_init+0xe/0xe0
  [    0.552000]  [<ffffffff8186aea5>] ret_from_fork+0x55/0x80
  [    0.552000]  [<ffffffff8185dcf0>] ? rest_init+0x80/0x80
  [    0.552000] Code: 8d 1c d2 8d ba 0b 02 00 00 44 8d 51 11 42 8b 14 dd 74 ec 10 82 c1 e7 0c 48 63 ff 81 e2 ff 0f 00 00 48 81 ea 00 10 80 00 48 29 fa <44> 89 12 89 72 10 42 8b 14 dd 74 ec 10 82 83 c1 10 81 e2 ff 0f 
  [    0.552000] RIP  [<ffffffff810592ff>] mp_irqdomain_activate+0x5f/0xa0
  [    0.996006]  RSP <ffff88010a0fbc48>
  [    0.996006] CR2: ffffffffff5f3000
  [    0.996006] ---[ end trace 1d0c3bd610d641a0 ]---
  [    1.012018] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009

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