kernel-packages team mailing list archive

[Philipp Hahn <hahn@xxxxxxxxxxxxx>]

More broken kernel versions:
v3.14: 9d054f57adc981a5f503d5eb9b259aa450b90dc5
v3.12: 9964b4c4ee925b2910723e509abd7241cff1ef84
v3.10: da8db0830a2ce63f628150307a01a315f5081202
ckt/linux-3.13.y: 6505b15f7f7efde1853b5a7641e9ce675c2b1a96
v3.4: -
v3.2: a3b0f6e8a21ef02f69a15abac440572d8cde8c2a

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https://bugs.launchpad.net/bugs/1543980

Title:
  Kernel 3.13.0-77 crashes (can be triggered by Samba)

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Trusty:
  Triaged

Bug description:
  Ubuntu 14.04.3 LTS

  After updating to kernel 3.13.0-77 system crashes.
  First, network dies, then the whole system.
  There are several kernel crashes in the logs.

  --- snip ---
  ProblemType: KernelOops
  Annotation: Your system might become unstable now and might need to be restarted.
  Date: Wed Feb 10 09:20:35 2016
  Failure: oops
  OopsText:
   BUG: soft lockup - CPU#1 stuck for 23s! [smbd:5908]
  --- snap ---

  Followed by kernel stack traces.

  After some investigation, it turned out that the crash can be triggered by Samba.
  It's easily reproducible by running the following commands in the Samba master branch:
  ./configure.developer
  TDB_NO_FSYNC=1 make -j test FAIL_IMMEDIATELY=1 SOCKET_WRAPPER_KEEP_PCAP=1 TESTS="samba3.raw.composite"

  Downgrading to kernel 3.13.0-76 solves this problem.

  Please let me know if we can provide more information or help testing.

  Thanks!

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