kernel-packages team mailing list archive

[John Johansen <john.johansen@xxxxxxxxxxxxx>]

** Tags added: kernel-cve-tracking-bug

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https://bugs.launchpad.net/bugs/1314762

Title:
  n_tty_write crash when echoing in raw mode

Status in “linux” package in Ubuntu:
  Incomplete
Status in “linux-armadaxp” package in Ubuntu:
  New
Status in “linux-ec2” package in Ubuntu:
  New
Status in “linux-fsl-imx51” package in Ubuntu:
  New
Status in “linux-lts-quantal” package in Ubuntu:
  New
Status in “linux-lts-raring” package in Ubuntu:
  New
Status in “linux-lts-saucy” package in Ubuntu:
  New
Status in “linux-mvl-dove” package in Ubuntu:
  New
Status in “linux-ti-omap4” package in Ubuntu:
  New

Bug description:
  The tty atomic_write_lock does not provide an exclusion guarantee for
  the tty driver if the termios settings are LECHO & !OPOST. And since
  it is unexpected and not allowed to call TTY buffer helpers like
  tty_insert_flip_string concurrently, this may lead to crashes when
  concurrect writers call pty_write. In that case the following two

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