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Description of problem:
lvcreate or lvconvert can be interrupted via SIGINT leaving inconsistent metadata behind.  Same likely applies to other metadata updating commands.

Version-Release number of selected component (if applicable):
  LVM version:     2.02.167(2) (2016-11-05)
  Library version: 1.02.139-git (2017-03-28)
  Driver version:  4.35.0

How reproducible:
Almost always

Steps to Reproduce:
1. create/convert an e.g. RaidLV and send SIGIN (i.e. press ^C) immediately
2. vgs fails on inconsistent metadata
3.

Actual results:
vgs (and other commands) fail on inconsistent metadata

Expected results:
Consistent metadata either w/ or w/o the change via lvcreate/lvconvert

Additional info:

There's an OBO bug in sigint_allow() causing the _oldmasked members to be set inproperly.

Upstream commit 9a689fb8f0a6b1675a4e819f4837bf2e0269832f

And upstream commit 4e21159a7f2c8d2806890b743866a0b9702e7532

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:2222