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[Launchpad Bug Tracker <1551894@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.4.0-10.25

---------------
linux (4.4.0-10.25) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1552247

  * linux:  4.4.0-9.X fails yama ptrace restrictions tests (LP: #1551894)
    - security: let security modules use PTRACE_MODE_* with bitmasks

  * [wily][regression] systemtap script compilation broken by new kernels (LP: #1545330)
    - SAUCE: (noup) locking/qspinlock: Move __ARCH_SPIN_LOCK_UNLOCKED to qspinlock_types.h

  * [Feature]SD/SDIO/eMMC support for Broxton-P (LP: #1520454)
    - mmc: sdhci: 64-bit DMA actually has 4-byte alignment
    - mmc: sdhci: Fix DMA descriptor with zero data length

  * Miscellaneous Ubuntu changes
    - SAUCE: (noup) cgroup: fix and restructure error handling in copy_cgroup_ns()

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Mon, 29 Feb 2016 13:04:14
-0700

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

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https://bugs.launchpad.net/bugs/1551894

Title:
  linux:  4.4.0-9.X fails yama ptrace restrictions tests

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  15:55:46 ERROR| [stderr] FAIL: test_093_ptrace_restriction (__main__.KernelSecurityTest)
  15:55:46 ERROR| [stderr] ptrace allowed only on children or declared processes

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