Ubuntu-4.4.0-120.144 fails to boot on arm64* hardware

[Paolo Pisati]

[Impact]

The Ubuntu-4.4.0-120.144 kernel (now in -proposed) fails to boot on all arm64 hardware: no console output or any other sign of activity, the system freeze just after the bootloader loads vmlinuz, and jumps to it.

We first experienced it on the snapdragon kernel snap in -beta (dragonboard 410c) but the bug is arm64 generic, and it affects all the arm64 hardware: a thunderx board shows the same exact symptoms.

The regression came down as part of the 4.4.115 stable update ("79e83d1 bpf: introduce BPF_JIT_ALWAYS_ON config") and enabled this option that crashes the arm64 kernel on boot.

[How to test]

Apply the attached patch, recompile, install and boot.

[Regression potential]

None, since the kernel already fails to boot.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1763644

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Brad Figg (brad-figg)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-xenial' to 'verification-done-xenial'. If the problem still exists, change the tag 'verification-needed-xenial' to 'verification-failed-xenial'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Kleber Sacilotto de Souza (kleber-souza)]

* linux-snapdragon kernel 4.4.0-1090.95 successfully booted and passed all ADT tests [1] and also snap-certification tests.

* linux kernel 4.4.0-121.145 for arm64 successfully booted and passed all ADT tests [2] and successfully booted in our internal arm64 test systems.

[1] http://people.canonical.com/~kernel/status/adt-matrix/xenial-linux-meta-snapdragon.html
[2] http://people.canonical.com/~kernel/status/adt-matrix/xenial-linux-meta.html

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-121.145

---------------
linux (4.4.0-121.145) xenial; urgency=medium

  * linux: 4.4.0-121.145 -proposed tracker (LP: #1763687)

  * Ubuntu-4.4.0-120.144 fails to boot on arm64* hardware (LP: #1763644)
    - [Config] arm64: disable BPF_JIT_ALWAYS_ON

linux (4.4.0-120.144) xenial; urgency=medium

  * linux: 4.4.0-120.144 -proposed tracker (LP: #1761438)

  * intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux-
    image-4.13.0-37-generic) (LP: #1759920) // CVE-2017-5715 (Spectre v2 Intel)
    - Revert "x86/mm: Only set IBPB when the new thread cannot ptrace current
      thread"
    - x86/speculation: Use Indirect Branch Prediction Barrier in context switch

  * DKMS driver builds fail with: Cannot use CONFIG_STACK_VALIDATION=y, please
    install libelf-dev, libelf-devel or elfutils-libelf-devel (LP: #1760876)
    - [Packaging] include the retpoline extractor in the headers

  * retpoline hints: primary infrastructure and initial hints (LP: #1758856)
    - [Packaging] retpoline-extract: flag *0xNNN(%reg) branches
    - x86/speculation, objtool: Annotate indirect calls/jumps for objtool
    - x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32bit
    - x86/paravirt, objtool: Annotate indirect calls
    - x86/asm: Stop depending on ptrace.h in alternative.h
    - [Packaging] retpoline -- add safe usage hint support
    - [Packaging] retpoline-check -- only report additions
    - [Packaging] retpoline -- widen indirect call/jmp detection
    - [Packaging] retpoline -- elide %rip relative indirections
    - [Packaging] retpoline -- clear hint information from packages
    - SAUCE: modpost: add discard to non-allocatable whitelist
    - KVM: x86: Make indirect calls in emulator speculation safe
    - KVM: VMX: Make indirect call speculation safe
    - x86/boot, objtool: Annotate indirect jump in secondary_startup_64()
    - SAUCE: early/late -- annotate indirect calls in early/late initialisation
      code
    - SAUCE: vga_set_mode -- avoid jump tables
    - [Config] retpoline -- switch to new format
    - [Packaging] final-checks -- remove check for empty retpoline files

  * Xenial update to 4.4.117 stable release (LP: #1756860)
    - IB/mlx4: Fix incorrectly releasing steerable UD QPs when have only ETH ports
    - PM / devfreq: Propagate error from devfreq_add_device()
    - s390: fix handling of -1 in set{,fs}[gu]id16 syscalls
    - ARM: dts: STi: Add gpio polarity for "hdmi,hpd-gpio" property
    - arm: spear600: Add missing interrupt-parent of rtc
    - arm: spear13xx: Fix dmas cells
    - arm: spear13xx: Fix spics gpio controller's warning
    - ALSA: seq: Fix regression by incorrect ioctl_mutex usages
    - KVM/x86: Reduce retpoline performance impact in slot_handle_level_range(),
      by always inlining iterator helper methods
    - x86/cpu: Change type of x86_cache_size variable to unsigned int
    - drm/radeon: adjust tested variable
    - rtc-opal: Fix handling of firmware error codes, prevent busy loops
    - ext4: save error to disk in __ext4_grp_locked_error()
    - ext4: correct documentation for grpid mount option
    - mm: hide a #warning fo...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-snapdragon - 4.4.0-1090.95

---------------
linux-snapdragon (4.4.0-1090.95) xenial; urgency=medium

  * linux-snapdragon: 4.4.0-1090.95 -proposed tracker (LP: #1763689)

  * Ubuntu-4.4.0-120.144 fails to boot on arm64* hardware (LP: #1763644)
    - [Config] arm64: disable BPF_JIT_ALWAYS_ON

  [ Ubuntu: 4.4.0-121.145 ]

  * linux: 4.4.0-121.145 -proposed tracker (LP: #1763687)
  * Ubuntu-4.4.0-120.144 fails to boot on arm64* hardware (LP: #1763644)
    - [Config] arm64: disable BPF_JIT_ALWAYS_ON

linux-snapdragon (4.4.0-1089.94) xenial; urgency=medium

  * linux-snapdragon: 4.4.0-1089.94 -proposed tracker (LP: #1761448)

  [ Ubuntu: 4.4.0-120.144 ]

  * linux: 4.4.0-120.144 -proposed tracker (LP: #1761438)
  * intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux-
    image-4.13.0-37-generic) (LP: #1759920) // CVE-2017-5715 (Spectre v2 Intel)
    - Revert "x86/mm: Only set IBPB when the new thread cannot ptrace current
      thread"
    - x86/speculation: Use Indirect Branch Prediction Barrier in context switch
  * DKMS driver builds fail with: Cannot use CONFIG_STACK_VALIDATION=y, please
    install libelf-dev, libelf-devel or elfutils-libelf-devel (LP: #1760876)
    - [Packaging] include the retpoline extractor in the headers
  * retpoline hints: primary infrastructure and initial hints (LP: #1758856)
    - [Packaging] retpoline-extract: flag *0xNNN(%reg) branches
    - x86/speculation, objtool: Annotate indirect calls/jumps for objtool
    - x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32bit
    - x86/paravirt, objtool: Annotate indirect calls
    - x86/asm: Stop depending on ptrace.h in alternative.h
    - [Packaging] retpoline -- add safe usage hint support
    - [Packaging] retpoline-check -- only report additions
    - [Packaging] retpoline -- widen indirect call/jmp detection
    - [Packaging] retpoline -- elide %rip relative indirections
    - [Packaging] retpoline -- clear hint information from packages
    - SAUCE: modpost: add discard to non-allocatable whitelist
    - KVM: x86: Make indirect calls in emulator speculation safe
    - KVM: VMX: Make indirect call speculation safe
    - x86/boot, objtool: Annotate indirect jump in secondary_startup_64()
    - SAUCE: early/late -- annotate indirect calls in early/late initialisation
      code
    - SAUCE: vga_set_mode -- avoid jump tables
    - [Config] retpoline -- switch to new format
    - [Packaging] final-checks -- remove check for empty retpoline files
  * Xenial update to 4.4.117 stable release (LP: #1756860)
    - IB/mlx4: Fix incorrectly releasing steerable UD QPs when have only ETH ports
    - PM / devfreq: Propagate error from devfreq_add_device()
    - s390: fix handling of -1 in set{,fs}[gu]id16 syscalls
    - ARM: dts: STi: Add gpio polarity for "hdmi,hpd-gpio" property
    - arm: spear600: Add missing interrupt-parent of rtc
    - arm: spear13xx: Fix dmas cells
    - arm: spear13xx: Fix spics gpio controller's warning
    - ALSA: seq: Fix regression by incorrect ioctl_mutex usages
    - KVM/x86: Reduce retpoline performance impact in slot_handle_level_range(),
      by always inlining iter...