Some Error logs of gtp5g

Q/A
#1

Hello,

I’d like to ask you for your help.

In my dmesg, I’m often seeing these logs below.

upfgtp:[gtp5g] gtp1u_udp_encap_recv: No PDR match this skb : teid[xx]
upfgtp:[gtp5g] gtp5g_encap_recv: GTP packet has been dropped
upfgtp:[gtp5g] gtp1u_udp_encap_recv: GTP-U message type is not a TPDU: xxxx
upfgtp:[gtp5g] gtp5g_encap_recv: Pass up to the process

And also, when I encountered a kernel crash , which I don’t know how to reproduce yet, log below was repeatedly seen addition to the logs above.

upfgtp:[gtp5g] gtp5g_buf_skb_encap: Failed to send skb to unix domain socket PDR(52)

Does anyone what these logs means and what I can try to solve them ?
I’m using free5gc v3.0.6 and gtp5g 0.4.0.

I would be grateful if you could let me know.

#2

Hi @NK636,

Maybe you can check your Linux kernel version is 5.4.x or not. (with command $uname -r)

#3

Hello @tmchen,
Thank you for your response.

My linux kernel version is 5.0.0.

#6

hi @NK636,
You can try upgrade linux kernel version to 5.4.0-109-generic which is ok for me.
For upgrade linux kernel version you can reference the resource below.

Hope this work for you.

#7