Unexpected warning when hibernating

Bug #1895980 reported by Marcelo Cerri
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux-azure (Ubuntu)
Low
Marcelo Cerri
Focal
Undecided
Unassigned

Bug Description

[Impact]

After the initial support for hibernation with Hyper-V was added to linux-azure, the following warning is now seem when the system hibernates:

...
[ 58.847939] Disabling non-boot CPUs ...
[ 58.852140] smpboot: CPU 1 is now offline
[ 58.857921] smpboot: CPU 2 is now offline
[ 58.863623] smpboot: CPU 3 is now offline
[ 58.869363] unchecked MSR access error: WRMSR to 0x40000106 (tried to write 0x412d4f49 000100ee) at rIP: 0xffffffff9ee1d9b8 (hv_cpu_die+0xe8/0x110)
...

The warning is harmless but it can be fixed by upstream commit 38dce4195f0d (x86/hyperv: Properly suspend/resume reenlightenment notifications")

[Test Case]

Using a bionic instance azure with the latest 5.4 kernel, perform the following steps:

1. Ensure kvm.ko is loaded.
2. Configure the system for hibernation following the steps in https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1880032/comments/14
3. Monitor the console via the azure portal.
4. Hibernate the system with "echo disk > /sys/power/state".

The message above shouldn't be shown anymore once the issue is fixed.

[Regression Potential]

Hibernation is not in use yet and any regressions shouldn't be critical.

CVE References

Marcelo Cerri (mhcerri)
Changed in linux-azure (Ubuntu Focal):
status: New → In Progress
Changed in linux-azure (Ubuntu Focal):
status: In Progress → Fix Committed
Revision history for this message
Launchpad Janitor (janitor) wrote :
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This bug was fixed in the package linux-azure - 5.4.0-1031.32

---------------
linux-azure (5.4.0-1031.32) focal; urgency=medium

  [ Ubuntu: 5.4.0-51.56 ]

  * Packaging resync (LP: #1786013)
    - update dkms package versions

linux-azure (5.4.0-1030.31) focal; urgency=medium

  [ Ubuntu: 5.4.0-50.55 ]

  * CVE-2020-16119
    - SAUCE: dccp: avoid double free of ccid on child socket
  * CVE-2020-16120
    - Revert "UBUNTU: SAUCE: overlayfs: ensure mounter privileges when reading
      directories"
    - ovl: pass correct flags for opening real directory
    - ovl: switch to mounter creds in readdir
    - ovl: verify permissions in ovl_path_open()
    - ovl: call secutiry hook in ovl_real_ioctl()
    - ovl: check permission to open real file

linux-azure (5.4.0-1029.29) focal; urgency=medium

  * focal/linux-azure: 5.4.0-1029.29 -proposed tracker (LP: #1897102)

  * btrfs: trimming a btrfs device which has been shrunk previously fails and
    fills root disk with garbage data (LP: #1896154)
    - btrfs: trim: fix underflow in trim length to prevent access beyond device
      boundary

  * Mellanox patch for fixing failures in ConnectX3 Pro/DPDK (LP: #1896760)
    - RDMA/mlx4: Read pkey table length instead of hardcoded value

linux-azure (5.4.0-1027.27) focal; urgency=medium

  * focal/linux-azure: 5.4.0-1027.27 -proposed tracker (LP: #1895994)

  * Focal update: v5.4.61 upstream stable release (LP: #1893115)
    - azure: [Config] update config for SPI_DYNAMIC

  * Unexpected warning when hibernating (LP: #1895980)
    - x86/hyperv: Properly suspend/resume reenlightenment notifications

  * [linux-azure] [SRU] UBUNTU: SAUCE: Drivers: hv: vmbus: Add timeout to
    vmbus_wait_for_unload (LP: #1895527)
    - SAUCE: Drivers: hv: vmbus: Add timeout to vmbus_wait_for_unload

  [ Ubuntu: 5.4.0-49.53 ]

  * focal/linux: 5.4.0-49.53 -proposed tracker (LP: #1896007)
  * Comet Lake PCH-H RAID not support on Ubuntu20.04 (LP: #1892288)
    - ahci: Add Intel Comet Lake PCH-H PCI ID
  * Novalink (mkvterm command failure) (LP: #1892546)
    - tty: hvcs: Don't NULL tty->driver_data until hvcs_cleanup()
  * Oops and hang when starting LVM snapshots on 5.4.0-47 (LP: #1894780)
    - SAUCE: Revert "mm: memcg/slab: fix memory leak at non-root kmem_cache
      destroy"
  * Intel x710 LOMs do not work on Focal (LP: #1893956)
    - i40e: Fix LED blinking flow for X710T*L devices
    - i40e: enable X710 support
  * Add/Backport EPYC-v3 and EPYC-Rome CPU model (LP: #1887490)
    - kvm: svm: Update svm_xsaves_supported
  * Fix non-working NVMe after S3 (LP: #1895718)
    - SAUCE: PCI: Enable ACS quirk on CML root port
  * Focal update: v5.4.65 upstream stable release (LP: #1895881)
    - ipv4: Silence suspicious RCU usage warning
    - ipv6: Fix sysctl max for fib_multipath_hash_policy
    - netlabel: fix problems with mapping removal
    - net: usb: dm9601: Add USB ID of Keenetic Plus DSL
    - sctp: not disable bh in the whole sctp_get_port_local()
    - taprio: Fix using wrong queues in gate mask
    - tipc: fix shutdown() of connectionless socket
    - net: disable netpoll on fresh napis
    - Linux 5.4.65
  * Focal update: v5.4.64 upstream stable release (LP: #1895...

Changed in linux-azure (Ubuntu Focal):
status: Fix Committed → Fix Released
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