[linux-azure] Include mainline commits fc96df16a1ce and ba50bf1ce9a5 in Azure kernel

[Joseph Salisbury]

This is a request to include the following two commits in 16.04 and 18.04 linux-azure:

fc96df16a1ce ("Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels")
ba50bf1ce9a5 ("Drivers: hv: vmbus: Check for ring when getting debug info")

Both commits are fixes to prior commits and have been cc'd to upstream stable.

Commit fc96df16a1ce is in mainline as of v4.20
Commit ba50bf1ce9a5 is in mainline as of v5.0-rc4

The problem these commits fix is that some of the code for displaying values for entries in /sys/bus/vmbus don't have appropriate locking to prevent reading an entry while it is being created or being freed. The result is accessing a bogus memory address.

[Marcelo Cerri (mhcerri)]

https://lists.ubuntu.com/archives/kernel-team/2019-April/100261.html

[Marcelo Cerri (mhcerri)]

https://lists.ubuntu.com/archives/kernel-team/2019-April/100267.html

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure - 4.18.0-1018.18

---------------
linux-azure (4.18.0-1018.18) cosmic; urgency=medium

  [ Ubuntu: 4.18.0-20.21 ]

  * CVE-2018-12126 // CVE-2018-12127 // CVE-2018-12130
    - Documentation/l1tf: Fix small spelling typo
    - x86/cpu: Sanitize FAM6_ATOM naming
    - kvm: x86: Report STIBP on GET_SUPPORTED_CPUID
    - locking/atomics, asm-generic: Move some macros from <linux/bitops.h> to a
      new <linux/bits.h> file
    - tools include: Adopt linux/bits.h
    - x86/msr-index: Cleanup bit defines
    - x86/speculation: Consolidate CPU whitelists
    - x86/speculation/mds: Add basic bug infrastructure for MDS
    - x86/speculation/mds: Add BUG_MSBDS_ONLY
    - x86/kvm: Expose X86_FEATURE_MD_CLEAR to guests
    - x86/speculation/mds: Add mds_clear_cpu_buffers()
    - x86/speculation/mds: Clear CPU buffers on exit to user
    - x86/kvm/vmx: Add MDS protection when L1D Flush is not active
    - x86/speculation/mds: Conditionally clear CPU buffers on idle entry
    - x86/speculation/mds: Add mitigation control for MDS
    - x86/speculation/mds: Add sysfs reporting for MDS
    - x86/speculation/mds: Add mitigation mode VMWERV
    - Documentation: Move L1TF to separate directory
    - Documentation: Add MDS vulnerability documentation
    - x86/speculation/mds: Add mds=full,nosmt cmdline option
    - x86/speculation: Move arch_smt_update() call to after mitigation decisions
    - x86/speculation/mds: Add SMT warning message
    - x86/speculation/mds: Fix comment
    - x86/speculation/mds: Print SMT vulnerable on MSBDS with mitigations off
    - x86/speculation/mds: Add 'mitigations=' support for MDS
  * CVE-2017-5715 // CVE-2017-5753
    - s390/speculation: Support 'mitigations=' cmdline option
  * CVE-2017-5715 // CVE-2017-5753 // CVE-2017-5754 // CVE-2018-3639
    - powerpc/speculation: Support 'mitigations=' cmdline option
  * CVE-2017-5715 // CVE-2017-5754 // CVE-2018-3620 // CVE-2018-3639 //
    CVE-2018-3646
    - cpu/speculation: Add 'mitigations=' cmdline option
    - x86/speculation: Support 'mitigations=' cmdline option
  * Packaging resync (LP: #1786013)
    - [Packaging] resync git-ubuntu-log

linux-azure (4.18.0-1017.17) cosmic; urgency=medium

  * linux-azure: 4.18.0-1017.17 -proposed tracker (LP: #1826166)

  * [linux-azure] Include mainline commits fc96df16a1ce and ba50bf1ce9a5 in
    Azure kernel (LP: #1821378)
    - Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels
    - Drivers: hv: vmbus: Check for ring when getting debug info

  * [linux-azure] Commit To Improve NVMe Performance (LP: #1819689)
    - blk-mq: remove the request_list usage

  [ Ubuntu: 4.18.0-19.20 ]

  * linux: 4.18.0-19.20 -proposed tracker (LP: #1826171)
  * Packaging resync (LP: #1786013)
    - [Packaging] resync git-ubuntu-log
  * autopkgtests run too often, too much and don't skip enough (LP: #1823056)
    - [Debian] Set +x on rebuild testcase.
    - [Debian] Skip rebuild test, for regression-suite deps.
    - [Debian] Make ubuntu-regression-suite skippable on unbootable kernels.
    - [Debian] make rebuild use skippable error codes when skipping.
    - [Debian] Only run regression-suite...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure - 4.15.0-1045.49

---------------
linux-azure (4.15.0-1045.49) xenial; urgency=medium

  * [linux-azure] Storage performance drop on RAID (LP: #1828248)
    - Revert "blk-mq: remove the request_list usage"

  [ Ubuntu: 4.15.0-50.54 ]

  * CVE-2018-12126 // CVE-2018-12127 // CVE-2018-12130
    - Documentation/l1tf: Fix small spelling typo
    - x86/cpu: Sanitize FAM6_ATOM naming
    - kvm: x86: Report STIBP on GET_SUPPORTED_CPUID
    - locking/atomics, asm-generic: Move some macros from <linux/bitops.h> to a
      new <linux/bits.h> file
    - tools include: Adopt linux/bits.h
    - x86/msr-index: Cleanup bit defines
    - x86/speculation: Consolidate CPU whitelists
    - x86/speculation/mds: Add basic bug infrastructure for MDS
    - x86/speculation/mds: Add BUG_MSBDS_ONLY
    - x86/kvm: Expose X86_FEATURE_MD_CLEAR to guests
    - x86/speculation/mds: Add mds_clear_cpu_buffers()
    - x86/speculation/mds: Clear CPU buffers on exit to user
    - x86/kvm/vmx: Add MDS protection when L1D Flush is not active
    - x86/speculation/mds: Conditionally clear CPU buffers on idle entry
    - x86/speculation/mds: Add mitigation control for MDS
    - x86/speculation/mds: Add sysfs reporting for MDS
    - x86/speculation/mds: Add mitigation mode VMWERV
    - Documentation: Move L1TF to separate directory
    - Documentation: Add MDS vulnerability documentation
    - x86/speculation/mds: Add mds=full,nosmt cmdline option
    - x86/speculation: Move arch_smt_update() call to after mitigation decisions
    - x86/speculation/mds: Add SMT warning message
    - x86/speculation/mds: Fix comment
    - x86/speculation/mds: Print SMT vulnerable on MSBDS with mitigations off
    - x86/speculation/mds: Add 'mitigations=' support for MDS
  * CVE-2017-5715 // CVE-2017-5753
    - s390/speculation: Support 'mitigations=' cmdline option
  * CVE-2017-5715 // CVE-2017-5753 // CVE-2017-5754 // CVE-2018-3639
    - powerpc/speculation: Support 'mitigations=' cmdline option
  * CVE-2017-5715 // CVE-2017-5754 // CVE-2018-3620 // CVE-2018-3639 //
    CVE-2018-3646
    - cpu/speculation: Add 'mitigations=' cmdline option
    - x86/speculation: Support 'mitigations=' cmdline option
  * Packaging resync (LP: #1786013)
    - [Packaging] resync git-ubuntu-log

linux-azure (4.15.0-1044.48) xenial; urgency=medium

  * linux-azure: 4.15.0-1044.48 -proposed tracker (LP: #1826354)

  * [linux-azure] Include mainline commits fc96df16a1ce and ba50bf1ce9a5 in
    Azure kernel (LP: #1821378)
    - Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels
    - Drivers: hv: vmbus: Check for ring when getting debug info

  * [linux-azure] Commit To Improve NVMe Performance (LP: #1819689)
    - blk-mq: remove the request_list usage

  [ Ubuntu: 4.15.0-49.53 ]

  * linux: 4.15.0-49.53 -proposed tracker (LP: #1826358)
  * Backport support for software count cache flush Spectre v2 mitigation. (CVE)
    (required for POWER9 DD2.3) (LP: #1822870)
    - powerpc/64s: Add support for ori barrier_nospec patching
    - powerpc/64s: Patch barrier_nospec in modules
    - powerpc/64s: Enable barrier_nospec based on firmware settings
    - powerpc...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure - 4.15.0-1045.49~14.04.1

---------------
linux-azure (4.15.0-1045.49~14.04.1) trusty; urgency=medium

  [ Ubuntu: 4.15.0-1045.49 ]

  * [linux-azure] Storage performance drop on RAID (LP: #1828248)
    - Revert "blk-mq: remove the request_list usage"
  * CVE-2018-12126 // CVE-2018-12127 // CVE-2018-12130
    - Documentation/l1tf: Fix small spelling typo
    - x86/cpu: Sanitize FAM6_ATOM naming
    - kvm: x86: Report STIBP on GET_SUPPORTED_CPUID
    - locking/atomics, asm-generic: Move some macros from <linux/bitops.h> to a
      new <linux/bits.h> file
    - tools include: Adopt linux/bits.h
    - x86/msr-index: Cleanup bit defines
    - x86/speculation: Consolidate CPU whitelists
    - x86/speculation/mds: Add basic bug infrastructure for MDS
    - x86/speculation/mds: Add BUG_MSBDS_ONLY
    - x86/kvm: Expose X86_FEATURE_MD_CLEAR to guests
    - x86/speculation/mds: Add mds_clear_cpu_buffers()
    - x86/speculation/mds: Clear CPU buffers on exit to user
    - x86/kvm/vmx: Add MDS protection when L1D Flush is not active
    - x86/speculation/mds: Conditionally clear CPU buffers on idle entry
    - x86/speculation/mds: Add mitigation control for MDS
    - x86/speculation/mds: Add sysfs reporting for MDS
    - x86/speculation/mds: Add mitigation mode VMWERV
    - Documentation: Move L1TF to separate directory
    - Documentation: Add MDS vulnerability documentation
    - x86/speculation/mds: Add mds=full,nosmt cmdline option
    - x86/speculation: Move arch_smt_update() call to after mitigation decisions
    - x86/speculation/mds: Add SMT warning message
    - x86/speculation/mds: Fix comment
    - x86/speculation/mds: Print SMT vulnerable on MSBDS with mitigations off
    - x86/speculation/mds: Add 'mitigations=' support for MDS
  * CVE-2017-5715 // CVE-2017-5753
    - s390/speculation: Support 'mitigations=' cmdline option
  * CVE-2017-5715 // CVE-2017-5753 // CVE-2017-5754 // CVE-2018-3639
    - powerpc/speculation: Support 'mitigations=' cmdline option
  * CVE-2017-5715 // CVE-2017-5754 // CVE-2018-3620 // CVE-2018-3639 //
    CVE-2018-3646
    - cpu/speculation: Add 'mitigations=' cmdline option
    - x86/speculation: Support 'mitigations=' cmdline option
  * Packaging resync (LP: #1786013)
    - [Packaging] resync git-ubuntu-log

linux-azure (4.15.0-1044.48~14.04.1) trusty; urgency=medium

  * linux-azure: 4.15.0-1044.48~14.04.1 -proposed tracker (LP: #1826352)

  * Packaging resync (LP: #1786013)
    - [Packaging] resync git-ubuntu-log
    - [Packaging] update helper scripts

  [ Ubuntu: 4.15.0-1044.48 ]

  * linux-azure: 4.15.0-1044.48 -proposed tracker (LP: #1826354)
  * [linux-azure] Include mainline commits fc96df16a1ce and ba50bf1ce9a5 in
    Azure kernel (LP: #1821378)
    - Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels
    - Drivers: hv: vmbus: Check for ring when getting debug info
  * [linux-azure] Commit To Improve NVMe Performance (LP: #1819689)
    - blk-mq: remove the request_list usage
  * linux: 4.15.0-49.53 -proposed tracker (LP: #1826358)
  * Backport support for software count cache flush Spectre v2 mitigation. (CVE)
    (required for POWER9 DD...

[Steve Langasek (vorlon)]

The verification of the Stable Release Update for linux-azure has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.