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Description of problem:
After deleting a LV that contained a XFS filesystem and creating a new LV in the same location, libblkid fails to remove the XFS signature. 

Version-Release number of selected component (if applicable):
libblkid 2.23.2-26.el7

How reproducible:
Always

Steps to Reproduce:
1. lvcreate -L 16m -n lv1 vg1
2. mkfs.xfs /dev/vg1/lv1
3. lvremove vg1/lv
4. lvcreate -L 16m -n lv1 vg1

Actual results:
# lvcreate -L 16m -n lv1 vg1 
WARNING: xfs signature detected on /dev/vg1/lv1 at offset 0. Wipe it? [y/n]: y
  Wiping xfs signature on /dev/vg1/lv1.
  Failed to get offset of the xfs_external_log signature on /dev/vg1/lv1.
  1 existing signature left on the device.
  Logical volume "lv1" created.

Expected results:
# lvcreate -L 16m -n lv1 vg1
WARNING: xfs signature detected on /dev/vg1/lv1 at offset 0. Wipe it? [y/n]: y
  Wiping xfs signature on /dev/vg1/lv1.
  Logical volume "lv1" created.

Additional info:
Bug does not reproduce on previous libblkid-2.23.2-22.el7_1.1.

The following patch could be the related:

"libblkid: make XFS Log visible for wipefs"
commit d5b7d2912afceac3774d1aaea9e8486b54d4e9e9

After building test packages that include d5b7d2912afceac3774d1aaea9e8486b54d4e9e9 I confirm that the problem is resolved by it.

i hit the same issue, after updating util-linux to 2.23.2-26.el7_2.2.x86_64, issue not observed.  thanks for the fix

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://rhn.redhat.com/errata/RHSA-2016-2605.html