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[Launchpad Bug Tracker <1208740@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.11.0-7.13

---------------
linux (3.11.0-7.13) saucy; urgency=low

  * Release tracker
    - LP: #1223545

  [ Andy Whitcroft ]

  * SAUCE: (no-up) scsi: add scsi device flag to request VPD pages be used at SPC-2
    - LP: #1223499
  * SAUCE: (no-up) scsi: add scsi device flag to request READ CAPACITY (16) be preferred
    - LP: #1223499
  * SAUCE: (no-up) scsi: hyper-v storage -- mark as VPD capable at SPC-2
    - LP: #1223499
  * SAUCE: (no-up) scsi: hyper-v storage -- mark as preferring READ CAPACITY (16) at SPC-2
    - LP: #1223499

  [ Maximiliano Curia ]

  * SAUCE: (no-up) Only let characters through when there are active readers.
    - LP: #1208740

  [ Tim Gardner ]

  * [Debian] getabis: Commit new ABI directory, remove the old
  * [Config] CONFIG_EFIVAR_FS=y
    - LP: #1223195
  * [Config] CONFIG_EFI_VARS_PSTORE=m,
    CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE=n
  * SAUCE: (no-up) USB: input: cm109.c: Convert high volume dev_err() to dev_err_ratelimited()
    - LP: #1222850

  [ Upstream Kernel Changes ]

  * Intel xhci: refactor EHCI/xHCI port switching
    - LP: #1210858
 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>   Tue, 10 Sep 2013 09:00:19 -0600

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

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https://bugs.launchpad.net/bugs/1208740

Title:
  Large pastes into readline enabled programs causes breakage from
  kernels v2.6.31 onwards

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  Triaged
Status in “linux” source package in Quantal:
  Triaged
Status in “linux” source package in Raring:
  Triaged
Status in “linux” source package in Saucy:
  Fix Released

Bug description:
  The bug is described in detail in this mail:
  https://lkml.org/lkml/2013/7/25/205 

  This bug affects any readline enabled program, like bash or psql.  A
  "large" paste is any paste of more than 4kb of data (4kb is the size
  of the kernel buffer for reading from the console).

  As can be found in the lkml thread, the issue is caused by the
  constant change between canonical mode and non-canonical mode, done by
  readline for each line being read.  This change means that when the
  buffer is full, some characters might get lost.

  This has been happening for a long time (starting with kernel
  v2.6.31-rc5), but it was barely noticeable for a while.  Some changes
  done in the way the kernel schedules character reading in v2.6.39-rc1
  made it much more noticeable.  Even the most recent kernels are
  affected.

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