This bug was fixed in the package linux-azure - 5.3.0-1028.29
---------------
linux-azure (5.3.0-1028.29) eoan; urgency=medium
[ Ubuntu: 5.3.0-59.53 ]
* CVE-2020-0543
- SAUCE: x86/speculation/spectre_v2: Exclude Zhaoxin CPUs from SPECTRE_V2
- SAUCE: x86/cpu: Add a steppings field to struct x86_cpu_id
- SAUCE: x86/cpu: Add 'table' argument to cpu_matches()
- SAUCE: x86/speculation: Add Special Register Buffer Data Sampling (SRBDS)
mitigation
- SAUCE: x86/speculation: Add SRBDS vulnerability and mitigation
documentation
- SAUCE: x86/speculation: Add Ivy Bridge to affected list
linux-azure (5.3.0-1023.24) eoan; urgency=medium
* eoan/linux-azure: 5.3.0-1023.24 -proposed tracker (LP: #1878809)
* Build and ship a signed wireguard.ko (LP: #1861284)
- [Config] azure: wireguard -- enable on all architectures
* linux-azure: Enable FSGSBASE instructions to support SGX (LP: #1877425)
- SAUCE: x86/ptrace: Prevent ptrace from clearing the FS/GS selector
- SAUCE: selftests/x86/fsgsbase: Test GS selector on ptracer-induced GS base
write
- SAUCE: x86/cpu: Add 'unsafe_fsgsbase' to enable CR4.FSGSBASE
- SAUCE: x86/entry/64: Clean up paranoid exit
- SAUCE: x86/entry/64: Switch CR3 before SWAPGS in paranoid entry
- SAUCE: x86/entry/64: Introduce the FIND_PERCPU_BASE macro
- SAUCE: x86/entry/64: Handle FSGSBASE enabled paranoid entry/exit
- SAUCE: x86/entry/64: Document GSBASE handling in the paranoid path
- SAUCE: x86/fsgsbase/64: Add intrinsics for FSGSBASE instructions
- SAUCE: x86/fsgsbase/64: Enable FSGSBASE instructions in helper functions
- SAUCE: x86/fsgsbase/64: Use FSGSBASE in switch_to() if available
- SAUCE: x86/fsgsbase/64: Use FSGSBASE instructions on thread copy and
ptrace
- SAUCE: x86/speculation/swapgs: Check FSGSBASE in enabling SWAPGS
mitigation
- SAUCE: selftests/x86/fsgsbase: Test ptracer-induced GS base write with
FSGSBASE
- SAUCE: x86/fsgsbase/64: Enable FSGSBASE on 64bit by default and add a
chicken bit
- SAUCE: x86/elf: Enumerate kernel FSGSBASE capability in AT_HWCAP2
- SAUCE: Documentation/x86/64: Add documentation for GS/FS addressing mode
[ Ubuntu: 5.3.0-56.50 ]
* eoan/linux: 5.3.0-56.50 -proposed tracker (LP: #1880111)
* Build and ship a signed wireguard.ko (LP: #1861284)
- [Packaging] wireguard -- add support for building signed .ko
- [Config] wireguard -- enable on all architectures
* Packaging resync (LP: #1786013)
- update dkms package versions
* debian/scripts/file-downloader does not handle positive failures correctly
(LP: #1878897)
- [Packaging] file-downloader not handling positive failures correctly
* Killer(R) Wi-Fi 6 AX1650i 160MHz Wireless Network Adapter (201NGW),
REV=0x354 [8086:a0f0] subsystem id [1a56:1651] wireless adapter not found
due to firmware crash (LP: #1874685)
- iwlwifi: pcie: handle QuZ configs with killer NICs as well
* CVE-2020-12114
- propagate_one(): mnt_set_mountpoint() needs mount_lock
* Eoan update: upstream stable patchset 2020-05-11 (LP: #1878073)
- ext4: fix extent_status fragmentation for plain files
- bpftool: Fix printing incorrect pointer in btf_dump_ptr
- [Config] updateconfigs for ARM64_ERRATUM_1542419
- arm64: errata: Hide CTR_EL0.DIC on systems affected by Neoverse-N1
#1542419
- arm64: Fake the IminLine size on systems affected by Neoverse-N1 #1542419
- arm64: compat: Workaround Neoverse-N1 #1542419 for compat user-space
- arm64: Silence clang warning on mismatched value/register sizes
- watchdog: reset last_hw_keepalive time at start
- scsi: lpfc: Fix kasan slab-out-of-bounds error in lpfc_unreg_login
- scsi: lpfc: Fix crash in target side cable pulls hitting WAIT_FOR_UNREG
- ceph: return ceph_mdsc_do_request() errors from __get_parent()
- ceph: don't skip updating wanted caps when cap is stale
- pwm: rcar: Fix late Runtime PM enablement
- scsi: iscsi: Report unbind session event when the target has been removed
- ASoC: Intel: atom: Take the drv->lock mutex before calling
sst_send_slot_map()
- nvme: fix deadlock caused by ANA update wrong locking
- kernel/gcov/fs.c: gcov_seq_next() should increase position index
- selftests: kmod: fix handling test numbers above 9
- ipc/util.c: sysvipc_find_ipc() should increase position index
- kconfig: qconf: Fix a few alignment issues
- s390/cio: avoid duplicated 'ADD' uevents
- loop: Better discard support for block devices
- Revert "powerpc/64: irq_work avoid interrupt when called with hardware
irqs
enabled"
- pwm: renesas-tpu: Fix late Runtime PM enablement
- pwm: bcm2835: Dynamically allocate base
- perf/core: Disable page faults when getting phys address
- ASoC: Intel: bytcr_rt5640: Add quirk for MPMAN MPWIN895CL tablet
- drm/amd/display: Not doing optimize bandwidth if flip pending.
- virtio-blk: improve virtqueue error to BLK_STS
- scsi: smartpqi: fix call trace in device discovery
- PCI/ASPM: Allow re-enabling Clock PM
- f2fs: fix to avoid memory leakage in f2fs_listxattr
- cxgb4: fix adapter crash due to wrong MC size
- cxgb4: fix large delays in PTP synchronization
- ipv6: fix restrict IPV6_ADDRFORM operation
- macsec: avoid to set wrong mtu
- macvlan: fix null dereference in macvlan_device_event()
- net: bcmgenet: correct per TX/RX ring statistics
- net: netrom: Fix potential nr_neigh refcnt leak in nr_add_node
- net: stmmac: dwmac-meson8b: Add missing boundary to RGMII TX clock array
- net/x25: Fix x25_neigh refcnt leak when receiving frame
- sched: etf: do not assume all sockets are full blown
- tcp: cache line align MAX_TCP_HEADER
- team: fix hang in team_mode_get()
- vrf: Fix IPv6 with qdisc and xfrm
- net: dsa: b53: Lookup VID in ARL searches when VLAN is enabled
- net: dsa: b53: Fix ARL register definitions
- net: dsa: b53: Rework ARL bin logic
- net: dsa: b53: b53_arl_rw_op() needs to select IVL or SVL
- xfrm: Always set XFRM_TRANSFORMED in xfrm{4,6}_output_finish
- vrf: Check skb for XFRM_TRANSFORMED flag
- mlxsw: Fix some IS_ERR() vs NULL bugs
- KEYS: Avoid false positive ENOMEM error on key read
- ALSA: hda: Remove ASUS ROG Zenith from the blacklist
- ALSA: usb-audio: Add static mapping table for ALC1220-VB-based mobos
- ALSA: usb-audio: Add connector notifier delegation
- iio: core: remove extra semi-colon from devm_iio_device_register() macro
- iio: st_sensors: rely on odr mask to know if odr can be set
- iio: adc: stm32-adc: fix sleep in atomic context
- iio: xilinx-xadc: Fix ADC-B powerdown
- iio: xilinx-xadc: Fix clearing interrupt when enabling trigger
- iio: xilinx-xadc: Fix sequencer configuration for aux channels in
simultaneous mode
- iio: xilinx-xadc: Make sure not exceed maximum samplerate
- USB: sisusbvga: Change port variable from signed to unsigned
- USB: Add USB_QUIRK_DELAY_CTRL_MSG and USB_QUIRK_DELAY_INIT for Corsair K70
RGB RAPIDFIRE
- USB: early: Handle AMD's spec-compliant identifiers, too
- USB: core: Fix free-while-in-use bug in the USB S-Glibrary
- USB: hub: Fix handling of connect changes during sleep
- vmalloc: fix remap_vmalloc_range() bounds checks
- mm/hugetlb: fix a addressing exception caused by huge_pte_offset
- mm/ksm: fix NULL pointer dereference when KSM zero page is enabled
- tools/vm: fix cross-compile build
- ALSA: usx2y: Fix potential NULL dereference
- ALSA: hda/realtek - Fix unexpected init_amp override
- ALSA: hda/realtek - Add new codec supported for ALC245
- ALSA: usb-audio: Fix usb audio refcnt leak when getting spdif
- ALSA: usb-audio: Filter out unsupported sample rates on Focusrite devices
- tpm/tpm_tis: Free IRQ if probing fails
- tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send()
- KVM: s390: Return last valid slot if approx index is out-of-bounds
- KVM: Check validity of resolved slot when searching memslots
- KVM: VMX: Enable machine check support for 32bit targets
- tty: hvc: fix buffer overflow during hvc_alloc().
- tty: rocket, avoid OOB access
- usb-storage: Add unusual_devs entry for JMicron JMS566
- audit: check the length of userspace generated audit records
- ASoC: dapm: fixup dapm kcontrol widget
- iwlwifi: pcie: actually release queue memory in TVQM
- iwlwifi: mvm: beacon statistics shouldn't go backwards
- ARM: imx: provide v7_cpu_resume() only on ARM_CPU_SUSPEND=y
- powerpc/setup_64: Set cache-line-size based on cache-block-size
- staging: comedi: dt2815: fix writing hi byte of analog output
- staging: comedi: Fix comedi_device refcnt leak in comedi_open
- vt: don't hardcode the mem allocation upper bound
- vt: don't use kmalloc() for the unicode screen buffer
- staging: vt6656: Don't set RCR_MULTICAST or RCR_BROADCAST by default.
- staging: vt6656: Fix calling conditions of vnt_set_bss_mode
- staging: vt6656: Fix drivers TBTT timing counter.
- staging: vt6656: Fix pairwise key entry save.
- staging: vt6656: Power save stop wake_up_count wrap around.
- cdc-acm: close race betrween suspend() and acm_softint
- cdc-acm: introduce a cool down
- UAS: no use logging any details in case of ENODEV
- UAS: fix deadlock in error handling and PM flushing work
- usb: dwc3: gadget: Fix request completion check
- usb: f_fs: Clear OS Extended descriptor counts to zero in ffs_data_reset()
- xhci: prevent bus suspend if a roothub port detected a over-current
condition
- serial: sh-sci: Make sure status register SCxSR is read in correct
sequence
- xfs: Fix deadlock between AGI and AGF with RENAME_WHITEOUT
- tools/testing/nvdimm: Fix compilation failure without
CONFIG_DEV_DAX_PMEM_COMPAT
- scsi: libfc: If PRLI rejected, move rport to PLOGI state
- nvme-tcp: fix possible crash in write_zeroes processing
- tools/test/nvdimm: Fix out of tree build
- drm/amd/display: Update stream adjust in dc_stream_adjust_vmin_vmax
- dma-direct: fix data truncation in dma_direct_get_required_mask()
- lib/raid6/test: fix build on distros whose /bin/sh is not bash
- s390/cio: generate delayed uevent for vfio-ccw subchannels
- nvme: fix compat address handling in several ioctls
- ALSA: usb-audio: Add Pioneer DJ DJM-250MK2 quirk
- PCI/PM: Add pcie_wait_for_link_delay()
- scsi: smartpqi: fix controller lockup observed during force reboot
- scsi: smartpqi: fix problem with unique ID for physical device
- ipv4: Update fib_select_default to handle nexthop objects
- net/mlx4_en: avoid indirect call in TX completion
- selftests: Fix suppress test in fib_tests.sh
- net: dsa: b53: Fix valid setting for MDB entries
- vxlan: use the correct nlattr array in NL_SET_ERR_MSG_ATTR
- geneve: use the correct nlattr array in NL_SET_ERR_MSG_ATTR
- iio: adc: ti-ads8344: properly byte swap value
- USB: hub: Revert commit bd0e6c9614b9 ("usb: hub: try old enumeration
scheme
first for high speed devices")
- tty: serial: owl: add "much needed" clk_prepare_enable()
- staging: gasket: Fix incongruency in handling of sysfs entries creation
- coredump: fix null pointer dereference on coredump
- tpm: fix wrong return value in tpm_pcr_extend
- signal: Avoid corrupting si_pid and si_uid in do_notify_parent
- mac80211: populate debugfs only after cfg80211 init
- SUNRPC: Fix backchannel RPC soft lockups
- iwlwifi: mvm: Do not declare support for ACK Enabled Aggregation
- iwlwifi: mvm: fix inactive TID removal return value usage
- cifs: fix uninitialised lease_key in open_shroot()
- usb: typec: tcpm: Ignore CC and vbus changes in PORT_RESET change
- usb: typec: altmode: Fix typec_altmode_get_partner sometimes returning an
invalid pointer
- xhci: Fix handling halted endpoint even if endpoint ring appears empty
- xhci: Don't clear hub TT buffer on ep0 protocol stall
- Revert "serial: uartps: Fix uartps_major handling"
- Revert "serial: uartps: Use the same dynamic major number for all ports"
- Revert "serial: uartps: Fix error path when alloc failed"
- Revert "serial: uartps: Do not allow use aliases >= MAX_UART_INSTANCES"
- Revert "serial: uartps: Change uart ID port allocation"
- Revert "serial: uartps: Move Port ID to device data structure"
- Revert "serial: uartps: Register own uart console and driver structures"
- powerpc/kuap: PPC_KUAP_DEBUG should depend on PPC_KUAP
- powerpc/mm: Fix CONFIG_PPC_KUAP_DEBUG on PPC32
- compat: ARM64: always include asm-generic/compat.h
* Eoan update: upstream stable patchset 2020-05-05 (LP: #1876971)
- arm, bpf: Fix offset overflow for BPF_MEM BPF_DW
- objtool: Fix switch table detection in .text.unlikely
- scsi: sg: add sg_remove_request in sg_common_write
- ext4: use non-movable memory for superblock readahead
- watchdog: sp805: fix restart handler
- arm, bpf: Fix bugs with ALU64 {RSH, ARSH} BPF_K shift by 0
- ARM: dts: imx6: Use gpc for FEC interrupt controller to fix wake on LAN.
- netfilter: nf_tables: report EOPNOTSUPP on unsupported flags/object type
- irqchip/mbigen: Free msi_desc on device teardown
- ALSA: hda: Don't release card at firmware loading error
- of: unittest: kmemleak on changeset destroy
- of: unittest: kmemleak in of_unittest_platform_populate()
- of: unittest: kmemleak in of_unittest_overlay_high_level()
- of: overlay: kmemleak in dup_and_fixup_symbol_prop()
- x86/Hyper-V: Report crash register data or kmsg before running crash
kernel
- rbd: avoid a deadlock on header_rwsem when flushing notifies
- rbd: call rbd_dev_unprobe() after unwatching and flushing notifies
- xsk: Add missing check on user supplied headroom size
- x86/Hyper-V: Unload vmbus channel in hv panic callback
- x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump
- x86/Hyper-V: Trigger crash enlightenment only once during system crash.
- x86/Hyper-V: Report crash register data when sysctl_record_panic_msg is
not
set
- x86/Hyper-V: Report crash data in die() when panic_on_oops is set
- clk: at91: usb: continue if clk_hw_round_rate() return zero
- power: supply: bq27xxx_battery: Silence deferred-probe error
- clk: tegra: Fix Tegra PMC clock out parents
- soc: imx: gpc: fix power up sequencing
- rtc: 88pm860x: fix possible race condition
- NFSv4/pnfs: Return valid stateids in nfs_layout_find_inode_by_stateid()
- NFS: direct.c: Fix memory leak of dreq when nfs_get_lock_context fails
- s390/cpuinfo: fix wrong output when CPU0 is offline
- powerpc/maple: Fix declaration made after definition
- s390/cpum_sf: Fix wrong page count in error message
- ext4: do not commit super on read-only bdev
- um: ubd: Prevent buffer overrun on command completion
- cifs: Allocate encryption header through kmalloc
- include/linux/swapops.h: correct guards for non_swap_entry()
- percpu_counter: fix a data race at vm_committed_as
- compiler.h: fix error in BUILD_BUG_ON() reporting
- KVM: s390: vsie: Fix possible race when shadowing region 3 tables
- x86: ACPI: fix CPU hotplug deadlock
- drm/amdkfd: kfree the wrong pointer
- NFS: Fix memory leaks in nfs_pageio_stop_mirroring()
- f2fs: fix NULL pointer dereference in f2fs_write_begin()
- drm/vc4: Fix HDMI mode validation
- iommu/vt-d: Fix mm reference leak
- ext2: fix empty body warnings when -Wextra is used
- ext2: fix debug reference to ext2_xattr_cache
- power: supply: axp288_fuel_gauge: Broaden vendor check for Intel Compute
Sticks.
- libnvdimm: Out of bounds read in __nd_ioctl()
- iommu/amd: Fix the configuration of GCR3 table root pointer
- f2fs: fix to wait all node page writeback
- net: dsa: bcm_sf2: Fix overflow checks
- fbdev: potential information leak in do_fb_ioctl()
- iio: si1133: read 24-bit signed integer for measurement
- tty: evh_bytechan: Fix out of bounds accesses
- locktorture: Print ratio of acquisitions, not failures
- mtd: spinand: Explicitly use MTD_OPS_RAW to write the bad block marker to
OOB
- mtd: lpddr: Fix a double free in probe()
- mtd: phram: fix a double free issue in error path
- KEYS: Don't write out to userspace while holding key semaphore
- bpf: fix buggy r0 retval refinement for tracing helpers
- ALSA: hda: Honor PM disablement in PM freeze and thaw_noirq ops
- kbuild, btf: Fix dependencies for DEBUG_INFO_BTF
- afs: Fix missing XDR advance in xdr_decode_{AFS,YFS}FSFetchStatus()
- afs: Fix decoding of inline abort codes from version 1 status records
- afs: Fix rename operation status delivery
- afs: Fix afs_d_validate() to set the right directory version
- afs: Fix race between post-modification dir edit and readdir/d_revalidate
- block, bfq: turn put_queue into release_process_ref in
__bfq_bic_change_cgroup
- block, bfq: make reparent_leaf_entity actually work only on leaf entities
- block, bfq: invoke flush_idle_tree after reparent_active_queues in
pd_offline
- clk: Don't cache errors from clk_ops::get_phase()
- net/mlx5e: Enforce setting of a single FEC mode
- f2fs: fix the panic in do_checkpoint()
- ARM: dts: rockchip: fix vqmmc-supply property name for rk3188-bqedison2qc
- arm64: dts: allwinner: a64: Fix display clock register range
- arm64: tegra: Add PCIe endpoint controllers nodes for Tegra194
- arm64: tegra: Fix Tegra194 PCIe compatible string
- arm64: dts: clearfog-gt-8k: set gigabit PHY reset deassert delay
- dma-coherent: fix integer overflow in the reserved-memory dma allocation
- NFS: alloc_nfs_open_context() must use the file cred when available
- NFSv4.2: error out when relink swapfile
- ARM: dts: rockchip: fix lvds-encoder ports subnode for rk3188-bqedison2qc
- KVM: PPC: Book3S HV: Fix H_CEDE return code for nested guests
- f2fs: fix to show norecovery mount option
- phy: uniphier-usb3ss: Add Pro5 support
- f2fs: Fix mount failure due to SPO after a successful online resize FS
- f2fs: Add a new CP flag to help fsck fix resize SPO issues
- mm/hugetlb: fix build failure with HUGETLB_PAGE but not HUGEBTLBFS
- drm/nouveau/svm: check for SVM initialized before migrating
- drm/nouveau/svm: fix vma range check for migration
- drm/nouveau: workaround runpm fail by disabling PCI power management on
certain intel bridges
- csky: Fixup cpu speculative execution to IO area
- csky: Fixup get wrong psr value from phyical reg
- ACPICA: Fixes for acpiExec namespace init file
- um: falloc.h needs to be directly included for older libc
- iommu/virtio: Fix freeing of incomplete domains
- iommu/vt-d: Fix page request descriptor size
- csky: Fixup init_fpu compile warning with __init
- drm/nouveau/gr/gp107,gp108: implement workaround for HW hanging during
init
- dma-debug: fix displaying of dma allocation type
- ARM: dts: sunxi: Fix DE2 clocks register range
- fbmem: Adjust indentation in fb_prepare_logo and fb_blank
- mtd: rawnand: free the nand_device object
- docs: Fix path to MTD command line partition parser
- bpf: Test_verifier, bpf_get_stack return value add <0
- bpf: Test_progs, add test to catch retval refine error handling
- SAUCE: bpf: Test_progs, fix test_get_stack_rawtp_err.c build
- bpf, test_verifier: switch bpf_get_stack's 0 s> r8 test
* Eoan update: upstream stable patchset 2020-05-01 (LP: #1876321)
- amd-xgbe: Use __napi_schedule() in BH context
- hsr: check protocol version in hsr_newlink()
- net: ipv4: devinet: Fix crash when add/del multicast IP with autojoin
- net: ipv6: do not consider routes via gateways for anycast address check
- net: qrtr: send msgs from local of same id as broadcast
- net: revert default NAPI poll timeout to 2 jiffies
- net: stmmac: dwmac-sunxi: Provide TX and RX fifo sizes
- net: dsa: mt7530: fix tagged frames pass-through in VLAN-unaware mode
- ovl: fix value of i_ino for lower hardlink corner case
- scsi: ufs: Fix ufshcd_hold() caused scheduling while atomic
- jbd2: improve comments about freeing data buffers whose page mapping is
NULL
- pwm: pca9685: Fix PWM/GPIO inter-operation
- ext4: fix incorrect group count in ext4_fill_super error message
- ext4: fix incorrect inodes per group in error message
- ASoC: Intel: mrfld: fix incorrect check on p->sink
- ASoC: Intel: mrfld: return error codes when an error occurs
- ALSA: usb-audio: Filter error from connector kctl ops, too
- ALSA: usb-audio: Don't override ignore_ctl_error value from the map
- ALSA: usb-audio: Don't create jack controls for PCM terminals
- ALSA: usb-audio: Check mapping at creating connector controls, too
- keys: Fix proc_keys_next to increase position index
- tracing: Fix the race between registering 'snapshot' event trigger and
triggering 'snapshot' operation
- btrfs: check commit root generation in should_ignore_root
- mac80211_hwsim: Use kstrndup() in place of kasprintf()
- usb: dwc3: gadget: Don't clear flags before transfer ended
- drm/amd/powerplay: force the trim of the mclk dpm_levels if OD is enabled
- ext4: do not zeroout extents beyond i_disksize
- scsi: target: remove boilerplate code
- scsi: target: fix hang when multiple threads try to destroy the same iscsi
session
- x86/microcode/AMD: Increase microcode PATCH_MAX_SIZE
- x86/resctrl: Preserve CDP enable over CPU hotplug
- x86/resctrl: Fix invalid attempt at removing the default resource group
- mm/vmalloc.c: move 'area->pages' after if statement
- l2tp: Allow management of tunnels and session in user namespace
- net: phy: micrel: use genphy_read_status for KSZ9131
- net: tun: record RX queue in skb before do_xdp_generic()
- net/mlx5: Fix frequent ioread PCI access during recovery
- net/mlx5e: Add missing release firmware call
- net/mlx5e: Fix pfnum in devlink port attribute
- platform/chrome: cros_ec_rpmsg: Fix race with host event
- acpi/nfit: improve bounds checking for 'func'
- perf report: Fix no branch type statistics report issue
- net/bpfilter: remove superfluous testing message
- clk: at91: sam9x60: fix usb clock parents
- clk: at91: usb: use proper usbs_mask
- arm64: dts: librem5-devkit: add a vbus supply to usb0
- ALSA: hda/realtek - Enable the headset mic on Asus FX505DT
- arm64: vdso: don't free unallocated pages
- nl80211: fix NL80211_ATTR_FTM_RESPONDER policy
- mac80211: fix race in ieee80211_register_hw()
- net/mlx5e: Encapsulate updating netdev queues into a function
- net/mlx5e: Rename hw_modify to preactivate
- net/mlx5e: Use preactivate hook to set the indirection table
- drm/amdgpu: fix the hw hang during perform system reboot and reset
- i2c: designware: platdrv: Remove DPM_FLAG_SMART_SUSPEND flag on BYT and
CHT
- irqchip/ti-sci-inta: Fix processing of masked irqs
* Do not treat unresolved test case in ftrace from ubuntu_kernel_selftests as
failure (LP: #1877958)
- ftrace/selftest: make unresolved cases cause failure if --fail-unresolved
set
* alsa/sof: kernel oops on the machine without Intel hdmi audio codec (a
regression in the asoc machine driver) (LP: #1874359)
- SAUCE: ASoC: intel/skl/hda - fix oops on systems without i915 audio codec
* 'Elan touchpad' not detected on 'Lenovo ThinkBook 15 IIL' (LP: #1861610)
- SAUCE: Input: elan_i2c - add more hardware ID for Lenovo laptop
[ Ubuntu: 5.3.0-55.49 ]
* eoan/linux: 5.3.0-55.49 -proposed tracker (LP: #1879931)
* Docker registry doesn't stay up and keeps restarting (LP: #1879690)
- Revert "UBUNTU: SAUCE: overlayfs: fix shitfs special-casing"
- Revert "UBUNTU: SAUCE: overlayfs: use shiftfs hacks only with shiftfs as
underlay"
-- Kleber Sacilotto de Souza <kleber.so...@canonical.com> Thu, 04 Jun
2020 18:17:49 +0200
** Changed in: linux-azure-4.15 (Ubuntu Bionic)
Status: In Progress => Fix Released
--
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https://bugs.launchpad.net/bugs/1877425
Title:
linux-azure: Enable FSGSBASE instructions to support SGX
Status in linux-azure package in Ubuntu:
Fix Released
Status in linux-azure-4.15 package in Ubuntu:
In Progress
Status in linux-azure source package in Bionic:
Invalid
Status in linux-azure-4.15 source package in Bionic:
Fix Released
Status in linux-azure source package in Eoan:
Fix Released
Status in linux-azure-4.15 source package in Eoan:
Invalid
Status in linux-azure source package in Focal:
Fix Released
Status in linux-azure-4.15 source package in Focal:
Invalid
Bug description:
X86 has instructions (RDFSBASE, RDGSBASE, WRFSBASE, and WRGSBASE) to
support read/write of the FS/GS bases. Linux doesn't allow user mode
code to execute these instructions by default. These instructions can
be enabled for user mode by setting the 16th control bit of the CR4
register. Since only protected mode can modify the control registers,
application programs and operating-system procedures (running at
privilege levels 1, 2, or 3) are prevented from reading or loading the
control registers. The kernel patch sets this CR4 register and handles
the context switching to account for the fact that user mode can now
modify the FS/GS base.
A recent news article that talks about the performance benefits:
https://phoronix.com/scan.php?page=news_item&px=Intel-FSGSBASE-
Linux-2020. Another news article covers the performance information in
a lot more detail by running a number of performance tests:
https://www.phoronix.com/scan.php?page=article&item=linux-wip-
fsgsbase&num=1
Patch set: https://lkml.org/lkml/2019/10/4/725
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