Kern.log shows:
update-manager[8736]: segfault at b0 ip 00007fa2da8ccac8 sp 00007fa2b060e880 error 4 in ld-2.27.so[7fa2da8c0000+27000]
update-manager[9191]: segfault at b0 ip 00007f7bc46c4ac8 sp 00007f7b9a406880 error 4 in ld-2.27.so[7f7bc46b8000+27000]
update-manager[9217]: segfault at b0 ip 00007f8fa5194ac8 sp 00007f8f7aefe880 error 4 in ld-2.27.so[7f8fa5188000+27000]
update-manager[9263]: segfault at b0 ip 00007f956de0cac8 sp 00007f9543b76880 error 4 in ld-2.27.so[7f956de00000+27000]
update-manager[9289]: segfault at b0 ip 00007f9c118ccac8 sp 00007f9be764e880 error 4 in ld-2.27.so[7f9c118c0000+27000]
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
IPv4: martian source 192.168.178.255 from 192.168.178.20, on dev eth1
ll header: 00000000: ff ff ff ff ff ff 70 4d 7b 89 39 31 08 00 ......pM{.91..
audit: type=1400 audit(1561364963.053:37): apparmor="DENIED" operation="open" profile="man_groff" name="/etc/ld.so.preload" pid=11102 comm="preconv" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
audit: type=1400 audit(1561364963.057:38): apparmor="DENIED" operation="open" profile="man_groff" name="/etc/ld.so.preload" pid=11107 comm="troff" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
audit: type=1400 audit(1561365002.065:39): apparmor="DENIED" operation="open" profile="man_groff" name="/etc/ld.so.preload" pid=11277 comm="preconv" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
audit: type=1400 audit(1561365002.069:40): apparmor="DENIED" operation="open" profile="man_groff" name="/etc/ld.so.preload" pid=11282 comm="troff" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Do you have any idea how I can solve this problem?