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[Bug 1440103] Re: [Hyper-V] Kernel panic not functional on Vivid

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1440103@xxxxxxxxxxxxxxxxxx>
Date: Mon, 01 Feb 2016 15:04:06 -0000
Reply-to: Bug 1440103 <1440103@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
This bug was fixed in the package linux - 3.19.0-49.55

---------------
linux (3.19.0-49.55) vivid; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1536775

  [ Colin Ian King ]

  * SAUCE: (no-up) ACPI / tables: Add acpi_force_32bit_fadt_addr option to
    force 32 bit FADT addresses
    - LP: #1529381

  [ Tim Gardner ]

  * [Config] Add DRM ast driver to udeb installer image
    - LP: #1514711
  * SAUCE: (no-up) Revert "[SCSI] libiscsi: Reduce locking contention in
    fast path"
    - LP: #1517142

  [ Upstream Kernel Changes ]

  * powerpc/eeh: Fix recursive fenced PHB on Broadcom shiner adapter
    - LP: #1532942
  * Drivers: hv: vmbus: prevent cpu offlining on newer hypervisors
    - LP: #1440103
  * Drivers: hv: vmbus: teardown hv_vmbus_con workqueue and
    vmbus_connection pages on shutdown
    - LP: #1440103
  * drivers: hv: vmbus: Teardown synthetic interrupt controllers on module
    unload
    - LP: #1440103
  * clockevents: export clockevents_unbind_device instead of
    clockevents_unbind
    - LP: #1440103
  * Drivers: hv: vmbus: Teardown clockevent devices on module unload
    - LP: #1440103
  * Drivers: hv: vmbus: Add support for VMBus panic notifier handler
    - LP: #1440103
  * hv: run non-blocking message handlers in the dispatch tasklet
    - LP: #1440103
  * Drivers: hv: vmbus: unregister panic notifier on module unload
    - LP: #1440103
  * Drivers: hv: vmbus: Implement the protocol for tearing down vmbus state
    - LP: #1440103
  * kexec: define kexec_in_progress in !CONFIG_KEXEC case
    - LP: #1440103
  * Drivers: hv: vmbus: add special kexec handler
    - LP: #1440103
  * Drivers: hv: don't do hypercalls when hypercall_page is NULL
    - LP: #1440103
  * Drivers: hv: vmbus: add special crash handler
    - LP: #1440103
  * Drivers: hv: vmbus: prefer 'die' notification chain to 'panic'
    - LP: #1440103
  * hyperv: Implement netvsc_get_channels() ethool op
    - LP: #1494423
  * hv_netvsc: Properly size the vrss queues
    - LP: #1494423
  * hv_netvsc: Allocate the sendbuf in a NUMA aware way
    - LP: #1494423
  * hv_netvsc: Allocate the receive buffer from the correct NUMA node
    - LP: #1494423
  * Drivers: hv: vmbus: Implement NUMA aware CPU affinity for channels
    - LP: #1494423
  * Drivers: hv: vmbus: Allocate ring buffer memory in NUMA aware fashion
    - LP: #1494423
  * Drivers: hv: vmbus: Improve the CPU affiliation for channels
    - LP: #1494423
  * Drivers: hv: vmbus: Further improve CPU affiliation logic
    - LP: #1494423

linux (3.19.0-48.54) vivid; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1536124
  * Merged back Ubuntu-3.19.0-46.52

 -- Brad Figg <brad.figg@xxxxxxxxxxxxx>  Thu, 21 Jan 2016 12:29:48 -0800

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https://bugs.launchpad.net/bugs/1440103

Title:
  [Hyper-V] Kernel panic not functional on Vivid

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Vivid:
  Fix Released
Status in linux source package in Wily:
  Fix Released

Bug description:
  Issue description:
  Triggering a kernel panic will not produce a crash dump file.

  Steps to Reproduce:
  1. install kdump related packages.
  2. verify crashmem value - defaults to 384M-:129M
  3. verify that the system is ready for crash:
          # cat /sys/kernel/kexec_crash_loaded
          1
  4. trigger kernel panic with # echo c | sudo tee /proc/sysrq-trigger
  5. The system will freeze and no kernel dump will be generated, system is not rebooted automatically as configured in kdump-tools config.

  Versions details:
  Windows Server Host Edition: Microsoft Windows Server 2012 R2 Datacenter build 9600
  Distribution name and release: Ubuntu Vivid Vervet
  Kernel version: Linux ubuntu31 3.19.0-11-generic #11lp14233432v201504021617 SMP

  Repro output with VM settings as follows:
  2GB RAM, 1vCPU, crashmem: 384M:128M OR 384M:128M

  [  149.328829] SysRq : Trigger a crash
  [  149.342418] BUG: unable to handle kernel NULL pointer dereference at           (null)
  [  149.346369] IP: [<ffffffff814ae776>] sysrq_handle_crash+0x16/0x20
  [  149.346369] PGD 367a3067 PUD 7bdf0067 PMD 0
  [  149.346369] Oops: 0002 [#1] SMP
  [  149.346369] Modules linked in: joydev hid_generic hid_hyperv serio_raw hid 8250_fintek hyperv_keyboard hv_balloon hyp
  erv_fb i2c_piix4 mac_hid autofs4 hv_netvsc hv_utils hv_storvsc psmouse floppy pata_acpi hv_vmbus
  [  149.346369] CPU: 0 PID: 1379 Comm: tee Not tainted 3.19.0-11-generic #11lp14233432v201504021617
  [  149.346369] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090006  05/23/2012
  [  149.346369] task: ffff88007a7d3ae0 ti: ffff88007be7c000 task.ti: ffff88007be7c000
  [  149.346369] RIP: 0010:[<ffffffff814ae776>]  [<ffffffff814ae776>] sysrq_handle_crash+0x16/0x20
  [  149.346369] RSP: 0018:ffff88007be7fe68  EFLAGS: 00010292
  [  149.346369] RAX: 000000000000000f RBX: 0000000000000063 RCX: 000000000000000f
  [  149.346369] RDX: ffff88007ce0fd78 RSI: ffff88007ce0e498 RDI: 0000000000000063
  [  149.346369] RBP: ffff88007be7fe68 R08: 0000000000000002 R09: 0000000000000275
  [  149.346369] R10: 0000000000000092 R11: 0000000000000275 R12: 0000000000000004
  [  149.346369] R13: 0000000000000000 R14: ffffffff81cb38e0 R15: 0000000000000008
  [  149.346369] FS:  00007f0a2e22a700(0000) GS:ffff88007ce00000(0000) knlGS:0000000000000000
  [  149.346369] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  [  149.346369] CR2: 0000000000000000 CR3: 0000000036047000 CR4: 00000000000006f0
  [  149.346369] Stack:
  [  149.346369]  ffff88007be7fe98 ffffffff814aef96 0000000000000002 fffffffffffffffb
  [  149.346369]  00007ffc64e934b0 0000000000000002 ffff88007be7feb8 ffffffff814af443
  [  149.346369]  00007ffc64e934b0 ffff8800364f15c0 ffff88007be7fed8 ffffffff8125ad98
  [  149.346369] Call Trace:
  [  149.346369]  [<ffffffff814aef96>] __handle_sysrq+0x106/0x170
  [  149.346369]  [<ffffffff814af443>] write_sysrq_trigger+0x33/0x40
  [  149.346369]  [<ffffffff8125ad98>] proc_reg_write+0x48/0x70
  [  149.346369]  [<ffffffff811f33d7>] vfs_write+0xb7/0x1f0
  [  149.346369]  [<ffffffff811f3ece>] ? vfs_read+0x11e/0x140
  [  149.346369]  [<ffffffff811f3fe6>] SyS_write+0x46/0xb0
  [  149.346369]  [<ffffffff817c924d>] system_call_fastpath+0x16/0x1b
  [  149.346369] Code: ef e8 df f7 ff ff eb d8 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 66 66 66 66 90 55 c7 05 34 42 a3 00
  01 00 00 00 48 89 e5 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 66 66 66 66 90 55 31 c0 48 89 e5
  [  149.346369] RIP  [<ffffffff814ae776>] sysrq_handle_crash+0x16/0x20
  [  149.346369]  RSP <ffff88007be7fe68>
  [  149.346369] CR2: 0000000000000000
  [    0.000000] Initializing cgroup subsys cpuset
  [    0.000000] Initializing cgroup subsys cpu
  [    0.000000] Initializing cgroup subsys cpuacct
  [    0.000000] Linux version 3.19.0-11-generic (apw@gloin) (gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu12) ) #11lp14233432v
  201504021617 SMP Thu Apr 2 15:15:51 UTC 2015 (Ubuntu 3.19.0-11.11lp14233432v201504021617-generic 3.19.3)
  [    0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.19.0-11-generic root=/dev/mapper/ubuntu31--vg-root ro console=tty0 co
  nsole=ttyS1 irqpoll maxcpus=1 nousb systemd.unit=kdump-tools.service elfcorehdr=867700K

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References

[Bug 1440103] [NEW] [Hyper-V] Kernel panic not functional on Vivid
From: Chris Valean, 2015-04-03