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[Bug 1550596] Re: kvm fails to boot GNU Hurd kernels with 4.4 Xenial kernel


This bug was fixed in the package linux - 4.4.0-9.24

linux (4.4.0-9.24) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1551319

  * AppArmor logs denial for when the device path is ENOENT (LP: #1482943)
    - SAUCE: apparmor: fix log of apparmor audit message when kern_path() fails

  * BUG: unable to handle kernel NULL pointer dereference (aa_label_merge) (LP:
    - SAUCE: apparmor: Fix: insert race between label_update and label_merge
    - SAUCE: apparmor: Fix: ensure aa_get_newest will trip debugging if the
      replacedby is not setup
    - SAUCE: apparmor: Fix: label merge handling of marking unconfined and stale
    - SAUCE: apparmor: Fix: refcount race between locating in labelset and get
    - SAUCE: apparmor: Fix: ensure new labels resulting from merge have a
    - SAUCE: apparmor: Fix: label_vec_merge insertion
    - SAUCE: apparmor: Fix: deadlock in aa_put_label() call chain
    - SAUCE: apparmor: Fix: add required locking of __aa_update_replacedby on
      merge path
    - SAUCE: apparmor: Fix: convert replacedby update to be protected by the
      labelset lock
    - SAUCE: apparmor: Fix: update replacedby allocation to take a gfp parameter

  * apparmor kernel BUG kills firefox (LP: #1430546)
    - SAUCE: apparmor: Disallow update of cred when then subjective != the
      objective cred
    - SAUCE: apparmor: rework retrieval of the current label in the profile update

  * sleep from invalid context in aa_move_mount (LP: #1539349)
    - SAUCE: apparmor: fix sleep from invalid context

  * s390x: correct restore of high gprs on signal return (LP: #1550468)
    - s390/compat: correct restore of high gprs on signal return

  * missing SMAP support (LP: #1550517)
    - x86/entry/compat: Add missing CLAC to entry_INT80_32

  * Floating-point exception handler receives empty Data-Exception Code in
    Floating Point Control register (LP: #1548414)
    - s390/fpu: signals vs. floating point control register

  * kvm fails to boot GNU Hurd kernels with 4.4 Xenial kernel (LP: #1550596)
    - KVM: x86: fix conversion of addresses to linear in 32-bit protected mode

  * Surelock GA2 SP1: capiredp01: cxl_init_adapter fails for CAPI devices
    0000:01:00.0 and 0005:01:00.0 after upgrading to 840.10 Platform firmware
    build fips840/b1208b_1604.840 (LP: #1532914)
    - cxl: Fix PSL timebase synchronization detection

  * [Feature]EDAC support for Knights Landing (LP: #1519631)
    - EDAC, sb_edac: Set fixed DIMM width on Xeon Knights Landing

  * Various failures of kernel_security suite on Xenial kernel on s390x arch
    (LP: #1531327)
    - [config] s390x -- CONFIG_DEFAULT_MMAP_MIN_ADDR=65536

  * Unable to install VirtualBox Guest Service in 15.04 (LP: #1434579)
    - [Config] Provides: virtualbox-guest-modules when appropriate

  * linux is missing provides for virtualbox-guest-modules [i386 amd64 x32] (LP:
    - [Config] Provides: virtualbox-guest-modules when appropriate

  * Backport more recent driver for SKL, KBL and BXT graphics (LP: #1540390)
    - SAUCE: i915_bpo: Provide a backport driver for SKL, KBL & BXT graphics
    - SAUCE: i915_bpo: Update intel_ips.h file location
    - SAUCE: i915_bpo: Rename the backport driver to i915_bpo
    - SAUCE: i915_bpo: Add i915_bpo_*() calls for ubuntu/i915
    - drm/i915: remove an extra level of indirection in PCI ID list
    - drm/i915/kbl: Add Kabylake PCI ID
    - drm/i915/kbl: Add Kabylake GT4 PCI ID
    - mm: Export nr_swap_pages
    - async: export current_is_async()
    - drm: fix potential dangling else problems in for_each_ macros
    - dp/mst: add SDP stream support
    - drm: Implement drm_modeset_lock_all_ctx()
    - drm: Add "prefix" parameter to drm_rect_debug_print()
    - drm/i915: Set connector_state->connector using the helper.
    - drm/atomic: add connector mask to drm_crtc_state.
    - drm/i915: Report context GTT size
    - drm/i915: Add get_eld audio component
    - SAUCE: i915_bpo: Revert passing plane/encoder name
    - SAUCE: sound/hda: Load i915_bpo from the hda driver on SKL/KBL/BXT
    - SAUCE: i915_bpo: Support only SKL, KBL and BXT with the backport driver
    - drm/i915/bxt: update list of PCIIDs
    - drm/i915/skl: Add missing SKL ids
    - SAUCE: i915_bpo: Revert "drm/i915: Defer probe if gmux is present but its
      driver isn't"
    - SAUCE: uapi/drm/i915: Backport I915_EXEC_BSD_MASK
    - drm/atomic: Do not unset crtc when an encoder is stolen
    - drm/i915: Update connector_mask during readout, v2.
    - drm/atomic: Add encoder_mask to crtc_state, v3.
    - SAUCE: drm/core: Add drm_encoder_index.
    - SAUCE: i915_bpo: Revert "drm/i915: Switch DDC when reading the EDID"
    - i915_bpo: [Config] Enable CONFIG_DRM_I915_BPO=m

  * arm64: guest hangs when ntpd is running (LP: #1549494)
    - hrtimer: Add support for CLOCK_MONOTONIC_RAW
    - hrtimer: Catch illegal clockids
    - KVM: arm/arm64: timer: Switch to CLOCK_MONOTONIC_RAW

  * Miscellaneous Ubuntu changes
    - [Debian] git-ubuntu-log -- wrap long bug and commit titles
    - [Config] CONFIG_ARM_SMMU=y on arm64
    - rebase to v4.4.3
    - [Debian] git-ubuntu-log -- ensure we get the last commit
    - [Config] fix up spelling of probably again
    - [Debian] perf -- build in the context of the full generated local headers
    - SAUCE: tools: lib/bpf -- add generated headers to search path
    - SAUCE: proc: Always set super block owner to init_user_ns
    - SAUCE: fix-up: kern_mount fail path should not be doing put_buffers()
    - SAUCE: apparmor: Fix: oops do to invalid null ptr deref in label print fns
    - SAUCE: apparmor: debug: POISON label and replaceby pointer on free
    - SAUCE: apparmor: add underscores to indicate aa_label_next_not_in_set() use
      needs locking
    - SAUCE: apparmor: Fix: refcount leak in aa_label_merge
    - SAUCE: apparmor: ensure that repacedby sharing is done correctly
    - SAUCE: apparmor Fix: refcount bug in pivotroot mediation
    - SAUCE: apparmor: Fix: now that insert can force replacement use it instead
      of remove_and_insert
    - SAUCE: apparmor: Fix: refcount bug when inserting label update that
      transitions ns
    - SAUCE: apparmor: Fix: break circular refcount for label that is directly
    - SAUCE: apparmor: Don't remove label on rcu callback if the label has already
      been removed
    - SAUCE: apparmor: Fix: query label file permission
    - SAUCE: apparmor: fix: ref count leak when profile sha1 hash is read
    - SAUCE: fixup: cleanup return handling of labels
    - SAUCE: fix: replacedby forwarding is not being properly update when ns is
    - SAUCE: fixup: make __share_replacedby private to get rid of build warning
    - SAUCE: fixup: 20/23 locking issue around in __label_update
    - SAUCE: fixup: get rid of unused var build warning
    - SAUCE: fixup: cast poison values to remove warnings
    - SAUCE: apparmor: fix refcount race when finding a child profile
    - SAUCE: fixup: warning about aa_label_vec_find_or_create not being static
    - SAUCE: fix: audit "no_new_privs" case for exec failure
    - SAUCE: Fixup: __label_update() still doesn't handle some cases correctly.
    - SAUCE: Move replacedby allocation into label_alloc
    - [Debian] supply zfs dkms Provides: based on do_zfs
    - [Config] supply zfs dkms Provides: based on do_zfs
    - [Config] drop linux-image-3.0 provides

  * Miscellaneous upstream changes
    - x86/mpx: Fix off-by-one comparison with nr_registers

  [ Upstream Kernel Changes ]

  * rebase to v4.4.3

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Thu, 25 Feb 2016 19:47:55

** Changed in: linux (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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  kvm fails to boot GNU Hurd kernels with 4.4 Xenial kernel

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Since 4.4, I have not been able to boot GNU Hurd Kernels using KVM
  QEMU. I tracked this regression down to commit e8dd2d2d641c ("Silence
  compiler warning in arch/x86/kvm/emulate.c", 2015-09-06)

  This has been recently fixed with upstream commit

  KVM: x86: fix conversion of addresses to linear in 32-bit protected

  Commit e8dd2d2d641c ("Silence compiler warning in arch/x86/kvm/emulate.c",
  2015-09-06) broke boot of the Hurd.  The bug is that the "default:"
  case actually could modify "la", but after the patch this change is
  not reflected in *linear.

  The bug is visible whenever a non-zero segment base causes the linear
  address to wrap around the 4GB mark.

  Fixes: e8dd2d2d641cb2724ee10e76c0ad02e04289c017
  Cc: stable@xxxxxxxxxxxxxxx
  Reported-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
  Tested-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
  Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>

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