kernel-packages team mailing list archive

[Pavel Boldin <pboldin@xxxxxxxxxxxx>]

Public bug reported:

The problem is incorrect backporting of [1] to the Ubuntu Trusty kernel
[2].

While original patch moves `dm_get_live_table` to the appropriate
section mutex lock the backported code just adds another call to it
under the mutex leaving the original call under spinlock in place.

[1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2a708cff93f1845b9239bc7d6310aef54e716c6a
[2] http://kernel.ubuntu.com/git/ubuntu/ubuntu-trusty.git/commit/?id=340f3e9970d6251a549d0c8cf90179b190f15def

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1523491

Title:
  kernel stuck in dm_destroy

Status in linux package in Ubuntu:
  New

Bug description:
  The problem is incorrect backporting of [1] to the Ubuntu Trusty
  kernel [2].

  While original patch moves `dm_get_live_table` to the appropriate
  section mutex lock the backported code just adds another call to it
  under the mutex leaving the original call under spinlock in place.

  [1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2a708cff93f1845b9239bc7d6310aef54e716c6a
  [2] http://kernel.ubuntu.com/git/ubuntu/ubuntu-trusty.git/commit/?id=340f3e9970d6251a549d0c8cf90179b190f15def

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