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Description of problem:
Unexpected error show in log when restarting libvirtd

Version-Release number of selected component (if applicable):
libvirt-7.0.0-4.el9.x86_64
kernel-5.11.0-2.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Restart libvirtd:
#systemctl restart libvirtd

2.Check the syslog:
#cat /var/log/messages
...
Apr 13 05:35:39 * libvirtd[189229]: libcap-ng used by "/usr/sbin/libvirtd" failed due to not having CAP_SETPCAP in capng_apply
Apr 13 05:35:39 * libvirtd[189230]: libcap-ng used by "/usr/sbin/libvirtd" failed due to not having CAP_SETPCAP in capng_apply

Actual results:
Unexpected error show in log when restarting libvirtd

Expected results:
No error show in log when restarting libvirtd


Additional info:

Patch proposed upstream:

https://listman.redhat.com/archives/libvir-list/2021-June/msg00744.html

Merged upstream as:

438b50dda8 virSetUIDGIDWithCaps: Don't drop CAP_SETPCAP right away

v7.5.0-rc1-4-g438b50dda8

Verified with libvirt-daemon-7.5.0-1.el9.x86_64.

Test steps:
1.Restart libvirtd:
#systemctl restart libvirtd

2.Check the syslog:
# grep -E 'libvirtd.*fail*' /var/log/messages
no output