zfs corruption at zroot/usr/home:<0x0>

Hello world :-)

On 14.3-RELEASE-p5 amd64 I have encountered a kernel panic (will
report on bugzilla in a moment). After that I found some sites did not
load in a web browser, so my first guess was to try zpool status -v
and I got this:

errors: Permanent errors have been detected in the following files:
        zroot/usr/home:<0x0>

Any guess what does the <0x0> mean and how to fix the situation?
It should be a file name right?

zpool scrub and resilver did not help :-(

Will rolling back a snapshot fix the problem?

Any hints appreciated :-)
Tomek

--
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info