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[Launchpad Bug Tracker <1449372@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.13.0-57.95

---------------
linux (3.13.0-57.95) trusty; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1466592

  [ Brad Figg ]

  * Merged back Ubuntu-3.13.0-55.94 regression fix for security release

linux (3.13.0-56.93) trusty; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1465798

  [ Upstream Kernel Changes ]

  * net: eth: xgene: devm_ioremap() returns NULL on error
    - LP: #1458042
  * drivers: net: xgene: fix new firmware backward compatibility with older
    driver
    - LP: #1458042
  * drivers: net: xgene: constify of_device_id array
    - LP: #1458042
  * drivers: net: xgene: Add second SGMII based 1G interface
    - LP: #1458042
  * net: phy: re-design phy_modes to be self-contained
    - LP: #1458042
  * dtb: change binding name to match with newer firmware DT
    - LP: #1458042
  * dtb: xgene: Add second SGMII based 1G interface node
    - LP: #1458042
  * Btrfs: make xattr replace operations atomic
    - LP: #1438501
    - CVE-2014-9710
  * cdc-acm: prevent infinite loop when parsing CDC headers.
    - LP: #1460657
  * (upstream) libata: Blacklist queued TRIM on all Samsung 800-series
    - LP: #1338706, #1449005
  * ahci: avoton port-disable reset-quirk
    - LP: #1458617
  * xfs: avoid false quotacheck after unclean shutdown
    - LP: #1461730
  * (upstream)[SCSI] Add timeout to avoid infinite command retry
    - LP: #1449372
  * (upstream)scsi_lib: remove the description string in
    scsi_io_completion()
    - LP: #1449372
  * udf: Remove repeated loads blocksize
    - LP: #1462173
    - CVE-2015-4167
  * udf: Check length of extended attributes and allocation descriptors
    - LP: #1462173
    - CVE-2015-4167
  * vfs: read file_handle only once in handle_to_path
    - LP: #1416503
    - CVE-2015-1420
  * ozwpan: Use unsigned ints to prevent heap overflow
    - LP: #1463442
    - CVE-2015-4001
  * ozwpan: divide-by-zero leading to panic
    - LP: #1463445
    - CVE-2015-4003
  * ozwpan: Use proper check to prevent heap overflow
    - LP: #1463444
    - CVE-2015-4002
  * ozwpan: unchecked signed subtraction leads to DoS
    - LP: #1463444
    - CVE-2015-4002
  * Input: elantech - add new icbody type
    - LP: #1464490
  * Bluetooth: ath3k: Add support Atheros AR5B195 combo Mini PCIe card
    - LP: #1465796
  * power_supply: twl4030_madc: Check return value of power_supply_register
    - LP: #1465796
  * power_supply: lp8788-charger: Fix leaked power supply on probe fail
    - LP: #1465796
  * ARM: dts: dove: Fix uart[23] reg property
    - LP: #1465796
  * xtensa: xtfpga: fix hardware lockup caused by LCD driver
    - LP: #1465796
  * Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open()
    - LP: #1465796
  * xtensa: provide __NR_sync_file_range2 instead of __NR_sync_file_range
    - LP: #1465796
  * KVM: s390: Zero out current VMDB of STSI before including level3 data.
    - LP: #1465796
  * usb: musb: core: fix TX/RX endpoint order
    - LP: #1465796
  * drm/radeon: fix doublescan modes (v2)
    - LP: #1465796
  * usb: phy: Find the right match in devm_usb_phy_match
    - LP: #1465796
  * tools lib traceevent kbuffer: Remove extra update to data pointer in
    PADDING
    - LP: #1465796
  * ring-buffer: Replace this_cpu_*() with __this_cpu_*()
    - LP: #1465796
  * ASoC: wm8741: Fix rates constraints values
    - LP: #1465796
  * cdc-wdm: fix endianness bug in debug statements
    - LP: #1465796
  * staging: panel: fix lcd type
    - LP: #1465796
  * UBI: account for bitflips in both the VID header and data
    - LP: #1465796
  * UBI: fix out of bounds write
    - LP: #1465796
  * UBI: initialize LEB number variable
    - LP: #1465796
  * UBI: fix check for "too many bytes"
    - LP: #1465796
  * ARM: S3C64XX: Use fixed IRQ bases to avoid conflicts on Cragganmore
    - LP: #1465796
  * ASoC: davinci-evm: drop un-necessary remove function
    - LP: #1465796
  * iscsi-target: Convert iscsi_thread_set usage to kthread.h
    - LP: #1465796
  * Drivers: hv: vmbus: Don't wait after requesting offers
    - LP: #1465796
  * Btrfs: fix log tree corruption when fs mounted with -o discard
    - LP: #1465796
  * btrfs: don't accept bare namespace as a valid xattr
    - LP: #1465796
  * ARM: 8320/1: fix integer overflow in ELF_ET_DYN_BASE
    - LP: #1465796
  * rtlwifi: rtl8192cu: Add new USB ID
    - LP: #1465796
  * MIPS: Hibernate: flush TLB entries earlier
    - LP: #1465796
  * ASoC: cs4271: Increase delay time after reset
    - LP: #1465796
  * stk1160: Make sure current buffer is released
    - LP: #1465796
  * mnt: Improve the umount_tree flags
    - LP: #1465796
  * ext4: make fsync to sync parent dir in no-journal for real this time
    - LP: #1465796
  * Input: elantech - fix absolute mode setting on some ASUS laptops
    - LP: #1465796
  * usb: define a generic USB_RESUME_TIMEOUT macro
    - LP: #1465796
  * usb: host: xhci: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: host: ehci: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: host: uhci: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: musb: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: host: isp116x: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: host: fotg210: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: host: fusbh200: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: host: oxu210hp: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: host: r8a66597: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: host: sl811: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: dwc2: hcd: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: isp1760: hcd: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * usb: core: hub: use new USB_RESUME_TIMEOUT
    - LP: #1465796
  * iser-target: Fix possible deadlock in RDMA_CM connection error
    - LP: #1465796
  * gpio: mvebu: Fix mask/unmask managment per irq chip type
    - LP: #1465796
  * scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
    - LP: #1465796
  * ALSA: emu10k1: don't deadlock in proc-functions
    - LP: #1465796
  * xtensa: ISS: fix locking in TAP network adapter
    - LP: #1465796
  * s390/hibernate: fix save and restore of kernel text section
    - LP: #1465796
  * Btrfs: fix inode eviction infinite loop after extent_same ioctl
    - LP: #1465796
  * Btrfs: fix inode eviction infinite loop after cloning into it
    - LP: #1465796
  * ACPICA: Utilities: split IO address types from data type models.
    - LP: #1465796
  * drm/i915: Dont enable CS_PARSER_ERROR interrupts at all
    - LP: #1465796
  * target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling
    - LP: #1465796
  * mm/hugetlb: use pmd_page() in follow_huge_pmd()
    - LP: #1465796
  * fs/binfmt_elf.c: fix bug in loading of PIE binaries
    - LP: #1465796
  * IB/core: disallow registering 0-sized memory region
    - LP: #1465796
  * IB/core: don't disallow registering region starting at 0x0
    - LP: #1465796
  * ptrace: fix race between ptrace_resume() and wait_task_stopped()
    - LP: #1465796
  * mvsas: fix panic on expander attached SATA devices
    - LP: #1465796
  * drm/i915: cope with large i2c transfers
    - LP: #1465796
  * RCU pathwalk breakage when running into a symlink overmounting
    something
    - LP: #1465796
  * compal-laptop: Check return value of power_supply_register
    - LP: #1465796
  * sched/idle/x86: Restore mwait_idle() to fix boot hangs, to improve
    power savings and to improve performance
    - LP: #1465796
  * nfs: don't call blocking operations while !TASK_RUNNING
    - LP: #1465796
  * nfs: fix high load average due to callback thread sleeping
    - LP: #1465796
  * e1000: add dummy allocator to fix race condition between mtu change and
    netpoll
    - LP: #1465796
  * wl18xx: show rx_frames_per_rates as an array as it really is
    - LP: #1465796
  * lib: memzero_explicit: use barrier instead of OPTIMIZER_HIDE_VAR
    - LP: #1465796
  * driver core: bus: Goto appropriate labels on failure in bus_add_device
    - LP: #1465796
  * C6x: time: Ensure consistency in __init
    - LP: #1465796
  * crypto: omap-aes - Fix support for unequal lengths
    - LP: #1465796
  * jhash: Update jhash_[321]words functions to use correct initval
    - LP: #1465796
  * KVM: use slowpath for cross page cached accesses
    - LP: #1465796
  * powerpc: Fix missing L2 cache size in /sys/devices/system/cpu
    - LP: #1465796
  * NFS: fix BUG() crash in notify_change() with patch to chown_common()
    - LP: #1465796
  * i2c: core: Export bus recovery functions
    - LP: #1465796
  * IB/mlx4: Fix WQE LSO segment calculation
    - LP: #1465796
  * mlx5: wrong page mask if CONFIG_ARCH_DMA_ADDR_T_64BIT enabled for 32Bit
    architectures
    - LP: #1465796
  * skbuff: Do not scrub skb mark within the same name space
    - LP: #1465796
  * firmware/ihex2fw.c: restore missing default in switch statement
    - LP: #1465796
  * memstick: mspro_block: add missing curly braces
    - LP: #1465796
  * tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support
    for O= option in Makefile
    - LP: #1465796
  * ext4: fix data corruption caused by unwritten and delayed extents
    - LP: #1465796
  * powerpc: Add vr save/restore functions
    - LP: #1465796
  * Linux 3.13.11-ckt21
    - LP: #1465796

 -- Luis Henriques <luis.henriques@xxxxxxxxxxxxx>  Thu, 18 Jun 2015
18:19:14 +0100

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https://bugs.launchpad.net/bugs/1449372

Title:
  Scsi kernel messages are being printed on separate lines.

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Trusty:
  Fix Released
Status in linux source package in Utopic:
  Fix Released

Bug description:
  [Impact]

   * The move to dev_printk has sufficiently modified the scsi error
  output that it confuses some automated log monitoring.  This causes
  some errors to not be definitively connected to a disk.  Context does
  help, but separate line context is difficult to automatedly parse.

  [Test Case]

   * Use a misbehaving disk that uses the scsi layer and look in
  kern.log for what appears to be errantly wrapped lines in the scsi
  error output

  [Regression Potential]

   * Minimal both changes are clean cherry-picks.  However as I do not
  have any misbehaving discs I was only able to boot test this.  I could
  get fancy, but that would take more time.

   * Both patches are upstream starting in utopic and vivid
  respectively.

  [Other Info]
   
   * This only partially resolves the issue.  That's because the fix (9e5ed2a5b3) that does solve this is very large, not a clean cherry-pick or easily backportable, and requires too many prerequisites and in my opinion not SRUable.  That fix is available starting in v4.0. My guess is this should be available in wily.

  
  ----- Original description---- 

  It seems to me that kernel errors, specifically those from the scsi
  driver, are being wrapped, which can confound automated log
  monitoring.

  Example from dmesg -- the lines I marked with X are being printed on
  separate lines where they previously weren't.

  [6461080.699629] sd 0:2:2:0: [sdc] Unhandled sense code
  [6461080.699646] sd 0:2:2:0: [sdc]
  [6461080.699650] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE X
  [6461080.699653] sd 0:2:2:0: [sdc]
  [6461080.699655] Sense Key : Medium Error [current] X
  [6461080.699661] sd 0:2:2:0: [sdc]
  [6461080.699663] Add. Sense: No additional sense information X
  [6461080.699667] sd 0:2:2:0: [sdc] CDB:
  [6461080.699669] Read(16): 88 00 00 00 00 00 0c 23 92 e0 00 00 00 08 00 00 X
  [6461080.699684] end_request: I/O error, dev sdc, sector 203657952

  This appears to affect 3.2 to pre-4.0, and was sane in lucid.  I'm
  certain it affects quantal to utopic, and vivid is partially
  mitigated.

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