cpum_sf: ensure sample freq is non-zero

[bugproxy]

== SRU Justification ==
A regression was introduced by commit 8c069ff4bd606 in v3.14-rc1. IBM
is requested commit 4bbaf2584b86 in all Ubuntu kernels to resolve this
isue.

Bug Description: cpum_sf: ensure sample freq is non-zero
Symptom: A kernel crash might occur.
Problem: An FP divide exception during the sample rate
              initialization for the hardware sampling facility.
Solution: Ensure that the sample frequency of the perf
              event attribute is non-zero.

== Fix ==
4bbaf2584b86 ("s390/cpum_sf: ensure sample frequency of perf event attributes is non-zero")

== Regression Potential ==
Low. Fix is specific to s390.

== Test Case ==
A test kernel was built with this patch and tested by the original bug reporter.
The bug reporter states the test kernel resolved the bug.

[Joseph Salisbury (jsalisbury)]

I built Xenial, Artful and Bionic test kernels with commit 4bbaf2584b86b0772413edeac22ff448f36351b1.

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1772593

Can you test this kernel and see if it resolves this bug?

Note about installing test kernels:
• If the test kernel is prior to 4.15(Bionic) you need to install the linux-image and linux-image-extra .deb packages.
• If the test kernel is 4.15(Bionic) or newer, you need to install the linux-modules, linux-modules-extra and linux-image-unsigned .deb packages.

Thanks in advance!

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2018-05-24 03:12 EDT-------
The patch was verified upfront

[Joseph Salisbury (jsalisbury)]

SRU request submitted:
https://lists.ubuntu.com/archives/kernel-team/2018-May/092737.html

[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-artful' to 'verification-done-artful'. If the problem still exists, change the tag 'verification-needed-artful' to 'verification-failed-artful'.

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!

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2018-06-13 03:56 EDT-------
The patch was verified upfront

[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!

[Frank Heimes (fheimes)]

verified - adjusting the tags accordingly

[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-bionic' to 'verification-done-bionic'. If the problem still exists, change the tag 'verification-needed-bionic' to 'verification-failed-bionic'.

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!

[Frank Heimes (fheimes)]

verified - adjusting the tags accordingly

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.13.0-46.51

---------------
linux (4.13.0-46.51) artful; urgency=medium

  * linux: 4.13.0-46.51 -proposed tracker (LP: #1776333)

  * register on binfmt_misc may overflow and crash the system (LP: #1775856)
    - fs/binfmt_misc.c: do not allow offset overflow

  * CVE-2018-11508
    - compat: fix 4-byte infoleak via uninitialized struct field

  * rfi-flush: Switch to new linear fallback flush (LP: #1744173)
    - SAUCE: rfi-flush: Factor out init_fallback_flush()
    - SAUCE: rfi-flush: Move rfi_flush_fallback_area to end of paca
    - powerpc/64s: Improve RFI L1-D cache flush fallback
    - powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again
    - powerpc/rfi-flush: Differentiate enabled and patched flush types
    - powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration

  * Fix enabling bridge MMIO windows (LP: #1771344)
    - powerpc/eeh: Fix enabling bridge MMIO windows

  * CVE-2018-1130
    - dccp: check sk for closed state in dccp_sendmsg()

  * CVE-2018-7757
    - scsi: libsas: fix memory leak in sas_smp_get_phy_events()

  * cpum_sf: ensure sample freq is non-zero (LP: #1772593)
    - s390/cpum_sf: ensure sample frequency of perf event attributes is non-zero

  * wlp3s0: failed to remove key (1, ff:ff:ff:ff:ff:ff) from hardware (-22)
    (LP: #1720930)
    - iwlwifi: mvm: fix "failed to remove key" message

  * CVE-2018-6927
    - futex: Prevent overflow by strengthen input validation

  * After update to 4.13-43 Intel Graphics are Laggy (LP: #1773520)
    - SAUCE: Revert "drm/i915/edp: Allow alternate fixed mode for eDP if
      available."

  * ELANPAD ELAN0612 does not work, patch available (LP: #1773509)
    - SAUCE: Input: elan_i2c - add ELAN0612 to the ACPI table

  * kernel backtrace when receiving large UDP packages (LP: #1772031)
    - iov_iter: fix page_copy_sane for compound pages

  * FS-Cache: Assertion failed: FS-Cache: 6 == 5 is false (LP: #1774336)
    - SAUCE: CacheFiles: fix a read_waiter/read_copier race

  * CVE-2018-5803
    - sctp: verify size of a new chunk in _sctp_make_chunk()

  * enable mic-mute hotkey and led on Lenovo M820z and M920z (LP: #1774306)
    - ALSA: hda/realtek - Enable mic-mute hotkey for several Lenovo AIOs

  * CVE-2018-7755
    - SAUCE: floppy: Do not copy a kernel pointer to user memory in FDGETPRM ioctl

  * CVE-2018-5750
    - ACPI: sbshc: remove raw pointer from printk() message

 -- Khalid Elmously <email address hidden> Mon, 11 Jun 2018 23:25:30 +0000

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.15.0-24.26

---------------
linux (4.15.0-24.26) bionic; urgency=medium

  * linux: 4.15.0-24.26 -proposed tracker (LP: #1776338)

  * Bionic update: upstream stable patchset 2018-06-06 (LP: #1775483)
    - drm: bridge: dw-hdmi: Fix overflow workaround for Amlogic Meson GX SoCs
    - i40e: Fix attach VF to VM issue
    - tpm: cmd_ready command can be issued only after granting locality
    - tpm: tpm-interface: fix tpm_transmit/_cmd kdoc
    - tpm: add retry logic
    - Revert "ath10k: send (re)assoc peer command when NSS changed"
    - bonding: do not set slave_dev npinfo before slave_enable_netpoll in
      bond_enslave
    - ipv6: add RTA_TABLE and RTA_PREFSRC to rtm_ipv6_policy
    - ipv6: sr: fix NULL pointer dereference in seg6_do_srh_encap()- v4 pkts
    - KEYS: DNS: limit the length of option strings
    - l2tp: check sockaddr length in pppol2tp_connect()
    - net: validate attribute sizes in neigh_dump_table()
    - llc: delete timers synchronously in llc_sk_free()
    - tcp: don't read out-of-bounds opsize
    - net: af_packet: fix race in PACKET_{R|T}X_RING
    - tcp: md5: reject TCP_MD5SIG or TCP_MD5SIG_EXT on established sockets
    - net: fix deadlock while clearing neighbor proxy table
    - team: avoid adding twice the same option to the event list
    - net/smc: fix shutdown in state SMC_LISTEN
    - team: fix netconsole setup over team
    - packet: fix bitfield update race
    - tipc: add policy for TIPC_NLA_NET_ADDR
    - pppoe: check sockaddr length in pppoe_connect()
    - vlan: Fix reading memory beyond skb->tail in skb_vlan_tagged_multi
    - amd-xgbe: Add pre/post auto-negotiation phy hooks
    - sctp: do not check port in sctp_inet6_cmp_addr
    - amd-xgbe: Improve KR auto-negotiation and training
    - strparser: Do not call mod_delayed_work with a timeout of LONG_MAX
    - amd-xgbe: Only use the SFP supported transceiver signals
    - strparser: Fix incorrect strp->need_bytes value.
    - net: sched: ife: signal not finding metaid
    - tcp: clear tp->packets_out when purging write queue
    - net: sched: ife: handle malformed tlv length
    - net: sched: ife: check on metadata length
    - llc: hold llc_sap before release_sock()
    - llc: fix NULL pointer deref for SOCK_ZAPPED
    - net: ethernet: ti: cpsw: fix tx vlan priority mapping
    - virtio_net: split out ctrl buffer
    - virtio_net: fix adding vids on big-endian
    - KVM: s390: force bp isolation for VSIE
    - s390: correct module section names for expoline code revert
    - microblaze: Setup dependencies for ASM optimized lib functions
    - commoncap: Handle memory allocation failure.
    - scsi: mptsas: Disable WRITE SAME
    - cdrom: information leak in cdrom_ioctl_media_changed()
    - m68k/mac: Don't remap SWIM MMIO region
    - block/swim: Check drive type
    - block/swim: Don't log an error message for an invalid ioctl
    - block/swim: Remove extra put_disk() call from error path
    - block/swim: Rename macros to avoid inconsistent inverted logic
    - block/swim: Select appropriate drive on device open
    - block/swim: Fix array bounds check
    - block/swim: Fix IO error at end of medium
    -...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-130.156

---------------
linux (4.4.0-130.156) xenial; urgency=medium

  * linux: 4.4.0-130.156 -proposed tracker (LP: #1776822)

  * CVE-2018-3665 (x86)
    - x86/fpu: Fix early FPU command-line parsing
    - x86/fpu: Fix 'no387' regression
    - x86/fpu: Disable MPX when eagerfpu is off
    - x86/fpu: Default eagerfpu=on on all CPUs
    - x86/fpu: Fix FNSAVE usage in eagerfpu mode
    - x86/fpu: Fix math emulation in eager fpu mode
    - x86/fpu: Fix eager-FPU handling on legacy FPU machines

linux (4.4.0-129.155) xenial; urgency=medium

  * linux: 4.4.0-129.155 -proposed tracker (LP: #1776352)

  * Xenial update to 4.4.134 stable release (LP: #1775771)
    - MIPS: ptrace: Expose FIR register through FP regset
    - MIPS: Fix ptrace(2) PTRACE_PEEKUSR and PTRACE_POKEUSR accesses to o32 FGRs
    - KVM: Fix spelling mistake: "cop_unsuable" -> "cop_unusable"
    - affs_lookup(): close a race with affs_remove_link()
    - aio: fix io_destroy(2) vs. lookup_ioctx() race
    - ALSA: timer: Fix pause event notification
    - mmc: sdhci-iproc: fix 32bit writes for TRANSFER_MODE register
    - libata: Blacklist some Sandisk SSDs for NCQ
    - libata: blacklist Micron 500IT SSD with MU01 firmware
    - xen-swiotlb: fix the check condition for xen_swiotlb_free_coherent
    - Revert "ipc/shm: Fix shmat mmap nil-page protection"
    - ipc/shm: fix shmat() nil address after round-down when remapping
    - kasan: fix memory hotplug during boot
    - kernel/sys.c: fix potential Spectre v1 issue
    - kernel/signal.c: avoid undefined behaviour in kill_something_info
    - xfs: remove racy hasattr check from attr ops
    - do d_instantiate/unlock_new_inode combinations safely
    - firewire-ohci: work around oversized DMA reads on JMicron controllers
    - NFSv4: always set NFS_LOCK_LOST when a lock is lost.
    - ALSA: hda - Use IS_REACHABLE() for dependency on input
    - ASoC: au1x: Fix timeout tests in au1xac97c_ac97_read()
    - kvm: x86: fix KVM_XEN_HVM_CONFIG ioctl
    - tracing/hrtimer: Fix tracing bugs by taking all clock bases and modes into
      account
    - PCI: Add function 1 DMA alias quirk for Marvell 9128
    - tools lib traceevent: Simplify pointer print logic and fix %pF
    - perf callchain: Fix attr.sample_max_stack setting
    - tools lib traceevent: Fix get_field_str() for dynamic strings
    - dm thin: fix documentation relative to low water mark threshold
    - nfs: Do not convert nfs_idmap_cache_timeout to jiffies
    - watchdog: sp5100_tco: Fix watchdog disable bit
    - kconfig: Don't leak main menus during parsing
    - kconfig: Fix automatic menu creation mem leak
    - kconfig: Fix expr_free() E_NOT leak
    - ipmi/powernv: Fix error return code in ipmi_powernv_probe()
    - Btrfs: set plug for fsync
    - btrfs: Fix out of bounds access in btrfs_search_slot
    - Btrfs: fix scrub to repair raid6 corruption
    - scsi: fas216: fix sense buffer initialization
    - HID: roccat: prevent an out of bounds read in kovaplus_profile_activated()
    - jffs2: Fix use-after-free bug in jffs2_iget()'s error handling path
    - powerpc/numa: Use ibm,max-associativity-domains to discover possib...

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2018-07-02 04:55 EDT-------
IBM Bugzilla status -> closed, Fix Released for Xenial, Artful and Bionic