This bug was fixed in the package linux-oem - 4.15.0-1038.43
---------------
linux-oem (4.15.0-1038.43) bionic; urgency=medium
[ 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-oem (4.15.0-1037.42) bionic; urgency=medium
* linux-oem: 4.15.0-1037.42 -proposed tracker (LP: #1826336)
* unnecessary request_queue freeze (LP: #1815733)
- block: avoid setting nr_requests to current value
- block: avoid setting none scheduler if it's already none
* Screen freeze after resume from S3 when HDMI monitor plugged on Dell
Precision 7740 (LP: #1825958)
- PCI: Restore resized BAR state on resume
[ 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: Use barrier_nospec in copy_from_user()
- powerpc/64: Use barrier_nospec in syscall entry
- powerpc/64s: Enhance the information in cpu_show_spectre_v1()
- powerpc/64: Disable the speculation barrier from the command line
- powerpc/64: Make stf barrier PPC_BOOK3S_64 specific.
- powerpc/64: Add CONFIG_PPC_BARRIER_NOSPEC
- powerpc/64: Call setup_barrier_nospec() from setup_arch()
- powerpc/64: Make meltdown reporting Book3S 64 specific
- powerpc/lib/code-patching: refactor patch_instruction()
- powerpc/lib/feature-fixups: use raw_patch_instruction()
- powerpc/asm: Add a patch_site macro & helpers for patching instructions
- powerpc/64s: Add new security feature flags for count cache flush
- powerpc/64s: Add support for software count cache flush
- powerpc/pseries: Query hypervisor for count cache flush settings
- powerpc/powernv: Query firmware for count cache flush settings
- powerpc/fsl: Add nospectre_v2 command line argument
- KVM: PPC: Book3S: Add count cache flush parameters to
kvmppc_get_cpu_char()
- [Config] Add CONFIG_PPC_BARRIER_NOSPEC
* 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, if requested to.
* bionic: fork out linux-snapdragon into its own topic kernel (LP: #1820868)
- [Packaging] remove arm64 snapdragon from getabis
- [Config] config changes for snapdragon split
- packaging: arm64: disable building the snapdragon flavour
- [Packaging] arm64: Drop snapdragon from kernel-versions
* CVE-2017-5753
- KVM: arm/arm64: vgic: fix possible spectre-v1 in vgic_get_irq()
- media: dvb_ca_en50221: prevent using slot_info for Spectre attacs
- sysvipc/sem: mitigate semnum index against spectre v1
- libahci: Fix possible Spectre-v1 pmp indexing in ahci_led_store()
- s390/keyboard: sanitize array index in do_kdsk_ioctl
- arm64: fix possible spectre-v1 write in ptrace_hbp_set_event()
- KVM: arm/arm64: vgic: Fix possible spectre-v1 write in
vgic_mmio_write_apr()
- pktcdvd: Fix possible Spectre-v1 for pkt_devs
- net: socket: fix potential spectre v1 gadget in socketcall
- net: socket: Fix potential spectre v1 gadget in sock_is_registered
- drm/amdgpu/pm: Fix potential Spectre v1
- netlink: Fix spectre v1 gadget in netlink_create()
- ext4: fix spectre gadget in ext4_mb_regular_allocator()
- drm/i915/kvmgt: Fix potential Spectre v1
- net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()
- fs/quota: Fix spectre gadget in do_quotactl
- hwmon: (nct6775) Fix potential Spectre v1
- mac80211_hwsim: Fix possible Spectre-v1 for hwsim_world_regdom_custom
- switchtec: Fix Spectre v1 vulnerability
- misc: hmc6352: fix potential Spectre v1
- tty: vt_ioctl: fix potential Spectre v1
- nl80211: Fix possible Spectre-v1 for NL80211_TXRATE_HT
- nl80211: Fix possible Spectre-v1 for CQM RSSI thresholds
- IB/ucm: Fix Spectre v1 vulnerability
- RDMA/ucma: Fix Spectre v1 vulnerability
- drm/bufs: Fix Spectre v1 vulnerability
- usb: gadget: storage: Fix Spectre v1 vulnerability
- ptp: fix Spectre v1 vulnerability
- HID: hiddev: fix potential Spectre v1
- vhost: Fix Spectre V1 vulnerability
- drivers/misc/sgi-gru: fix Spectre v1 vulnerability
- ipv4: Fix potential Spectre v1 vulnerability
- aio: fix spectre gadget in lookup_ioctx
- ALSA: emux: Fix potential Spectre v1 vulnerabilities
- ALSA: pcm: Fix potential Spectre v1 vulnerability
- ip6mr: Fix potential Spectre v1 vulnerability
- ALSA: rme9652: Fix potential Spectre v1 vulnerability
- ALSA: emu10k1: Fix potential Spectre v1 vulnerabilities
- KVM: arm/arm64: vgic: Fix off-by-one bug in vgic_get_irq()
- drm/ioctl: Fix Spectre v1 vulnerabilities
- char/mwave: fix potential Spectre v1 vulnerability
- applicom: Fix potential Spectre v1 vulnerabilities
- ipmi: msghandler: Fix potential Spectre v1 vulnerabilities
- powerpc/ptrace: Mitigate potential Spectre v1
- cfg80211: prevent speculation on cfg80211_classify8021d() return
- ALSA: rawmidi: Fix potential Spectre v1 vulnerability
- ALSA: seq: oss: Fix Spectre v1 vulnerability
* Bionic: Sync to Xenial (Spectre) (LP: #1822760)
- x86/speculation/l1tf: Suggest what to do on systems with too much RAM
- KVM: SVM: Add MSR-based feature support for serializing LFENCE
- KVM: VMX: fixes for vmentry_l1d_flush module parameter
- KVM: X86: Allow userspace to define the microcode version
- SAUCE: [Fix] x86/KVM/VMX: Add L1D flush logic
- SAUCE: [Fix] x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on
vmentry
* [SRU] [B/OEM] Fix ACPI bug that causes boot failure (LP: #1819921)
- SAUCE: ACPI / bus: Add some Lenovo laptops in list of acpi table term list
* Bionic update: upstream stable patchset for fuse 2019-04-12 (LP: #1824553)
- fuse: fix double request_end()
- fuse: fix unlocked access to processing queue
- fuse: umount should wait for all requests
- fuse: Fix oops at process_init_reply()
- fuse: Don't access pipe->buffers without pipe_lock()
- fuse: Fix use-after-free in fuse_dev_do_read()
- fuse: Fix use-after-free in fuse_dev_do_write()
- fuse: set FR_SENT while locked
- fuse: fix blocked_waitq wakeup
- fuse: fix leaked notify reply
- fuse: fix possibly missed wake-up after abort
- fuse: fix use-after-free in fuse_direct_IO()
- fuse: continue to send FUSE_RELEASEDIR when FUSE_OPEN returns ENOSYS
- fuse: handle zero sized retrieve correctly
- fuse: call pipe_buf_release() under pipe lock
- fuse: decrement NR_WRITEBACK_TEMP on the right page
* Backport support for software count cache flush Spectre v2 mitigation. (CVE)
(required for POWER9 DD2.3) (LP: #1822870) // Backport support for software
count cache flush Spectre v2 mitigation. (CVE) (required for POWER9 DD2.3)
(LP: #1822870)
- powerpc64s: Show ori31 availability in spectre_v1 sysfs file not v2
- powerpc/fsl: Fix spectre_v2 mitigations reporting
- powerpc: Avoid code patching freed init sections
* Backport support for software count cache flush Spectre v2 mitigation. (CVE)
(required for POWER9 DD2.3) (LP: #1822870) // Backport support for software
count cache flush Spectre v2 mitigation. (CVE) (required for POWER9 DD2.3)
(LP: #1822870) // Backport support for software count cache flush Spectre v2
mitigation. (CVE) (required for POWER9 DD2.3) (LP: #1822870)
- powerpc/security: Fix spectre_v2 reporting
* CVE-2019-3874
- sctp: use sk_wmem_queued to check for writable space
- sctp: implement memory accounting on tx path
- sctp: implement memory accounting on rx path
* NULL pointer dereference when using z3fold and zswap (LP: #1814874)
- z3fold: fix possible reclaim races
* Kprobe event argument syntax in ftrace from ubuntu_kernel_selftests failed
on B PowerPC (LP: #1812809)
- selftests/ftrace: Add ppc support for kprobe args tests
* The Realtek card reader does not enter PCIe 1.1/1.2 (LP: #1825487)
- misc: rtsx: make various functions static
- misc: rtsx: Enable OCP for rts522a rts524a rts525a rts5260
- SAUCE: misc: rtsx: Fixed rts5260 power saving parameter and sd glitch
* headset-mic doesn't work on two Dell laptops. (LP: #1825272)
- ALSA: hda/realtek - add two more pin configuration sets to quirk table
* CVE-2018-16884
- sunrpc: use SVC_NET() in svcauth_gss_* functions
- sunrpc: use-after-free in svc_process_common()
* sky2 ethernet card don't work after returning from suspension (LP: #1798921)
- sky2: Increase D3 delay again
* CVE-2019-9500
- brcmfmac: assure SSID length from firmware is limited
* CVE-2019-9503
- brcmfmac: add subtype check for event handling in data path
* CVE-2019-3882
- vfio/type1: Limit DMA mappings per container
* Intel I210 Ethernet card not working after hotplug [8086:1533]
(LP: #1818490)
- igb: Fix WARN_ONCE on runtime suspend
* bionic, xenial/hwe: misses "fuse: fix initial parallel dirops" patch
(LP: #1823972)
- fuse: fix initial parallel dirops
* amdgpu resume failure: failed to allocate wb slot (LP: #1825074)
- drm/amdgpu: fix&cleanups for wb_clear
* Pop noise when headset is plugged in or removed from GHS/Line-out jack
(LP: #1821290)
- ALSA: hda/realtek - Add unplug function into unplug state of Headset Mode
for ALC225
- ALSA: hda/realtek - Disable headset Mic VREF for headset mode of ALC225
- ALSA: hda/realtek - Add support headset mode for DELL WYSE AIO
- ALSA: hda/realtek - Add support headset mode for New DELL WYSE NB
* mac80211_hwsim unable to handle kernel NULL pointer dereference
at0000000000000000 (LP: #1825058)
- mac80211_hwsim: Timer should be initialized before device registered
* [regression][snd_hda_codec_realtek] repeating crackling noise after 19.04
upgrade (LP: #1821663)
- ALSA: hda: Add Intel NUC7i3BNB to the power_save blacklist
- ALSA: hda - add Lenovo IdeaCentre B550 to the power_save_blacklist
- ALSA: hda - Add two more machines to the power_save_blacklist
* ubuntu_nbd_smoke_test failed on P9 with Bionic kernel (LP: #1822247)
- nbd: fix how we set bd_invalidated
* TSC clocksource not available in nested guests (LP: #1822821)
- kvmclock: fix TSC calibration for nested guests
* 4.15 kernel ip_vs --ops causes performance and hang problem (LP: #1819786)
- ipvs: fix refcount usage for conns in ops mode
* systemd cause kernel trace "BUG: unable to handle kernel paging request at
6db23a14" on Cosmic i386 (LP: #1813244) // systemd cause kernel trace "BUG:
unable to handle kernel paging request at 6db23a14" on Cosmic i386
(LP: #1813244)
- openvswitch: fix flow actions reallocation
-- Stefan Bader <stefan.ba...@canonical.com> Wed, 08 May 2019 12:16:04
+0200
** Changed in: linux-oem (Ubuntu Cosmic)
Status: Invalid => Fix Released
** Changed in: linux-oem (Ubuntu Cosmic)
Status: Invalid => Fix Released
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem in Ubuntu.
https://bugs.launchpad.net/bugs/1815733
Title:
unnecessary request_queue freeze
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem package in Ubuntu:
New
Status in linux source package in Bionic:
Fix Committed
Status in linux-oem source package in Bionic:
Fix Released
Status in linux source package in Cosmic:
Fix Committed
Status in linux-oem source package in Cosmic:
Fix Released
Status in linux source package in Disco:
Fix Released
Status in linux-oem source package in Disco:
Fix Released
Bug description:
Hi all,
In linux-4.15, which is used as hwe-edge in xenial, there's an unexpected
behavior. It results in latency spikes of generic_make_request() function call.
How to reproduce:
1. Run fio:
fio --name=test --rw=randwrite --direct=1 --filename=/dev/sdt --iodepth=1
--fsync=1 --ioengine=libaio --write_lat_log loglat
2. While fio is writing to the device, change nr_requests setting to the
same value as current:
echo 256 > /sys/block/sdt/queue/nr_requests
or: if scheduler is already none:
echo none > /sys/block/sdt/queue/scheduler
3. Stop fio and check slat log:
...
3980, 16, 1, 4096
3999, 17, 1, 4096
4010, 19, 1, 4096
4020, 18, 1, 4096
4045, 10821, 1, 4096
4054, 25, 1, 4096
4070, 12, 1, 4096
4083, 17, 1, 4096
4094, 16, 1, 4096
4111, 17, 1, 4096
...
There're a few patches to fix this behavior:
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-5.1/block&id=e5fa81408fb43ebabde65938ef8b20ae879017e7
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-5.1/block&id=fbd72127c975dc8e532ecc73d52f3b1b00935bec
This behavior affects production systems, because every change uevent
triggers udev to change settings prior to udev rules. Some software,
for example arcconf (tool for managing adaptec HBA adapters) triggers
uevents for every block device. So, every call to arcconf utility
results in latency spike.
Could this be backported to 4.15 kernel for xenial/bionic?
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1815733/+subscriptions
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