clamd crashing affecting proxy

adamw

Hello,

My environment:
2.4.4-RELEASE-p1
squid-0.4.44_7
Netgate SG-3100 with 32GB SSD

Settings (pretty much default):
Enable Squid antivirus check using ClamAV
Enable Google Safe Browsing support
Exclude Audio/Video Streams
ClamAV Database Update: every 1 hour
Regional ClamAV Database Update Mirror: United Kingdom

PROBLEM:
Every 2-3 days (on average) clamd crashes producing only a single line in logs:

Jan 3 08:33:07	kernel		pid 90580 (clamd), uid 106: exited on signal 10

No additional info in /var/log/clamav/clamd.log

(...)
SelfCheck: Database status OK.
Reading databases from /var/db/clamav/
Database correctly reloaded (9623988 signatures)
SelfCheck: Database status OK.
SelfCheck: Database status OK.
SelfCheck: Database status OK.
SelfCheck: Database status OK.      ---> CRASH
+++ Started at Thu Jan  3 09:13:45 2019
Received 0 file descriptor(s) from systemd.
clamd daemon 0.100.2 (OS: freebsd11.2, ARCH: arm, CPU: armv6)
Running as user clamav (UID 106, GID 106)
Log file size limited to 1048576 bytes.
Reading databases from /var/db/clamav/
Not loading PUA signatures.
Bytecode: Security mode set to "TrustSigned".
Loaded 9623988 signatures.
LOCAL: Removing stale socket file /var/run/clamav/clamd.sock
LOCAL: Unix socket file /var/run/clamav/clamd.sock
LOCAL: Setting connection queue length to 200
(...)

As a result browsing either stops working or starts flickering (web pages come and go).
At the same time squid itself doesn't report any problems.
Starting clamd in Status -> Services solves the issue, but only until next crash.

Any ideas?

Thanks,
Adam