canonical-ubuntu-qa team mailing list archive

[Jürg Häfliger <1908498@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1908498

Title:
  ip_defrag.sh in net from ubuntu_kernel_selftests failed with Resource
  temporarily unavailable on F-oem-5.6

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux-oem-5.6 package in Ubuntu:
  Invalid
Status in linux-oem-5.6 source package in Focal:
  Fix Released

Bug description:
  [Impact]
  Failure to run ip_defrag deterministically.
   # selftests: net: ip_defrag.sh
   # ipv4 defrag
   # PASS
   # seed = 1608066927
   # ipv4 defrag with overlaps
   # PASS
   # seed = 1608066928
   # ipv6 defrag
   # PASS
   # seed = 1608066933
   # ipv6 defrag with overlaps
   # PASS
   # seed = 1608066933
   # ipv6 nf_conntrack defrag
   # seed = 1608066941
   # ./ip_defrag: recv: payload_len = 9990 max_frag_len = 8: Resource temporarily unavailable
   not ok 18 selftests: net: ip_defrag.sh # exit=1

  [Fix]
  * 065fcfd49763ec ("selftests: net: ip_defrag: ignore EPERM")
  Use smaller packets and ignore EPERM.

  This fix has already landed on other generic kernels in bug 1826848

  [Test case]
  Run the ip_defrag.sh multiple times without observing failures.

  [Where problems could occur]
  Fix is limited to the testing tool, it won't affect kernel functionality but the worst case is if the test fix is incorrect, it will cause us to miss real kernel bugs.

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