[Bug 1901328] Re: librbd: potential race conditions handling API IO completions

[Mohammed Naser]

*** This bug is a duplicate of bug 1898200 ***
    https://bugs.launchpad.net/bugs/1898200

** This bug has been marked a duplicate of bug 1898200
   [SRU] ceph 15.2.5

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https://bugs.launchpad.net/bugs/1901328

Title:
  librbd: potential race conditions handling API IO completions

Status in Ubuntu Cloud Archive:
  New
Status in ceph package in Ubuntu:
  New

Bug description:
  We've noticed an issue with a VM crashing with the following log
  record:

  [Sat Oct 24 15:54:40 2020] tp_librbd[65017]: segfault at 3f21 ip
  00007f5ea8796266 sp 00007f5e82ffc500 error 4 in
  librbd.so.1.12.0[7f5ea85b7000+5a3000]

  With the following packages:

  ii  librbd1                              15.2.3-0ubuntu0.20.04.2~cloud0         amd64        RADOS block device client library
  ii  python3-rbd                          15.2.3-0ubuntu0.20.04.2~cloud0         amd64        Python 3 libraries for the Ceph librbd library

  ===

  Upon verifying, this seems to be reported here:

  https://tracker.ceph.com/issues/47456

  With the fix patched here:

  https://github.com/ceph/ceph/pull/36331

  And the fix included inside 15.2.5

  https://docs.ceph.com/en/latest/releases/octopus/

  ===

  Would it be possible to bump the UCA shipped release of Ceph to
  15.2.5?

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