OS: FreeBSD CURRENT (FreeBSD 13.0-CURRENT #168 r368515: Thu Dec 10 15:01:30 CET 2020 amd64), port clamav-0.103.0,1 and clamav-unofficial-sigs-7.0.1.
Roughly seven days ago the access to the hosts/netoworks providing clamav's update files were blockes by our firewall. Since 12th of December, clamscan is running with two instances for a user (myself) on the specified host and it is unkillable. I tried almost every KILL signal to stop the process as root, as the UID it runs as, with no success.
Opening files with vi doesn't work or starting a new screen with screen command (sysutils/screen, screen-4.8.0) is stuck forever - the attached tty is irresponsive, ssh sessions are stuck and stay in that state forever.
The problem looks like a full /tmp or /var/tmp filesystem, but there is plenty of space left and I can't see anything wrong with out of space or out of inodes.
^Triage: notify maintainer.
(In reply to O. Hartmann from comment #1)
Oliver, perhaps if you could kill the parent pid (kill -s KILL $PPID). Examine
ps -axwd -o pid,ppid,command
(Generally a SIGTERM should be all that's required, or per FreeBSD's shutdown sequence, finally a SIGKILL deals with the recalcitrant)
Also, don't rule out that you might have a full /tmp /var/tmp. If an inode is being used, it may be locked to a naughty process and the space may appear free, but isn't.