Meelis Roos wrote:
Yesterdays git snapsot on a normal home PC spams dmesg with the following
line:
ipv4_get_l4proto: Frag of proto 17
In what situation does this happen?
It happens some times every hour on the average. Seems to be some UDP
traffic. Firewall allows in any UDP that is ESTABLISHEFD,RELATED, DHCP
(some more UDP rules with counter 0 so not important). Additionally
there is internal netowkr that sometimes has a laptop but usually not
and the messages have appeared also when there is nothin in the internal
network.
Locally mldonkey is probably using UDP, and lsof -i | grep UDP tells
that named, avahi-daemon, dhcpd, chronyd, nmbd and cupsd are listening
on UDP sockets (most of them on internal network).
But I have no idea what application is causing the messages.
I'm guessing that its ICMP errors containing UDP fragments.
Could you add a WARN_ON(1) to ipv4_get_l4proto() in
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c to verify
this?
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