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[Frank Heimes <1793086@xxxxxxxxxxxxxxxxxx>]

** Changed in: ubuntu-z-systems
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1793086

Title:
  qeth: use vzalloc for QUERY OAT buffer

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Bionic:
  Fix Released
Status in linux source package in Cosmic:
  Fix Released

Bug description:

  == SRU Justification ==
  IBM reports the qethqoat tool fails.  qeth_query_oat_command() currently
  allocates the kernel buffer for the SIOC_QETH_QUERY_OAT ioctl with kzalloc.

  This commit will cause the use of vzalloc() instead of kzalloc(), backing
  the allocation with non-contiguous memory.

  Xenial also needs this commit, but requres a slightly different
  backport.  It's SRU will be sent separate.

  == Fix ==
  aec45e857c55 ("s390/qeth: use vzalloc for QUERY OAT buffer")

  == Regression Potential ==
  Low, limited to s390.

  == Test Case ==
  IBM verified testing of this commit up-front.



  
  Description:  qeth: use vzalloc for QUERY OAT buffer

  Symptom:      qethqoat tool fails.

  Problem:      qeth_query_oat_command() currently allocates the kernel
                buffer for the SIOC_QETH_QUERY_OAT ioctl with kzalloc.

  Solution:     Using vzalloc() instead of kzalloc(), backing the
  allocation with non-contiguous memory.

  Commit -ID:  aec45e857c5538664edb76a60dd452e3265f37d1
  kernel 4.19.

  To be fixed for 18.10, 18,04 and 16.04.

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