https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187835
--- Comment #10 from Vladislav V. Prodan <ad...@support.od.ua> ---
(In reply to Aleksandr Fedorov from comment #6)
Yes, thank you.
On FreeBsd 12.1, with kern.ipc.maxsockbuf = 83886080 and adding 564 vlan, we
get the binary format:
# ngctl msg em2:lower gettable |more
Rec'd response 3 from "[b]:":
0000: 34 02 00 00 76 6c 61 6e 31 30 30 00 00 00 00 00 4...vlan100.....
0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0020: 00 00 00 00 64 00 64 00 00 00 76 6c 61 6e 31 30 ....d.d...vlan10
0030: 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1...............
0040: 00 00 00 00 00 00 00 00 00 00 65 00 65 00 00 00 ..........e.e...
0050: 76 6c 61 6e 31 30 32 00 00 00 00 00 00 00 00 00 vlan102.........
0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0070: 66 00 66 00 00 00 76 6c 61 6e 31 30 33 00 00 00 f.f...vlan103...
...
Further, after a sequence of commands leads to a kernel panic.
# delete all freshly created vlans
ngctl list | awk ' $2 ~ /ngeth/ {print "ngctl shutdown "$2":";}' | sh
# add already 700 vlan
cat test_creating_vlan.sh:
#!/bin/sh
# man ng_vlan
ETHER_IF=em2
ngctl -f- <<EOF
mkpeer ${ETHER_IF}: vlan lower downstream
name ${ETHER_IF}:lower vlan-${ETHER_IF}
connect ${ETHER_IF}: vlan-${ETHER_IF}: upper nomatch
EOF
for i in `jot 700 100`; do
ngctl mkpeer vlan-${ETHER_IF}: eiface vlan$i ether
ngctl msg vlan-${ETHER_IF}: addfilter \{ vlan=$i hook=\"vlan$i\" \}
done
### Again we delete these 700 vlans
ngctl list | awk ' $2 ~ /ngeth/ {print "ngctl shutdown "$2":";}' | sh
### and
kernel panic
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