samples: net: sockets: packet: reception stops working after a while

[shlomow]

Describe the bug
When running samples/net/sockets/packet the reception stops working after about 14 packets were received.

To Reproduce
Steps to reproduce the behavior:

1. west build -b native_posix_64 zephyr/samples/net/sockets/packet
2. On one terminal, run sudo ./net-setup.sh from the net-tools repo.
3. On the first terminal, type west build -t run.
4. Start sending packets to zeth interface (I used ping).

Expected behavior
All the packets are received correctly, and the print log net_pkt_sock_sample.recv_packet_socket: Received is printed for every packet.

Logs and console output

UART_0 connected to pseudotty: /dev/pts/4
WARNING: Using a test - not safe - entropy source
*** Booting Zephyr OS build zephyr-v2.5.0-2383-gf59cba331553  ***
[00:00:00.000,000] <inf> net_pkt_sock_sample: Packet socket sample is running
[00:00:00.000,000] <inf> net_pkt_sock_sample: Waiting for packets ...
[00:00:00.060,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 130 bytes
[00:00:00.960,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 130 bytes
[00:00:05.010,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:10.020,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:15.030,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:20.040,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:25.050,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:25.620,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 213 bytes
[00:00:26.640,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 213 bytes
[00:00:27.660,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 213 bytes
[00:00:28.680,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 213 bytes
[00:00:30.060,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:35.070,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:40.080,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:45.090,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:50.100,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:00:55.110,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:00.120,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:05.130,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:10.140,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:15.150,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:17.520,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 70 bytes
[00:01:20.160,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:25.170,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:30.180,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:32.220,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 42 bytes
[00:01:33.300,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 42 bytes
[00:01:34.320,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 42 bytes
[00:01:35.190,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:35.340,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 42 bytes
[00:01:36.360,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 42 bytes
[00:01:37.380,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 42 bytes
[00:01:38.400,000] <dbg> net_pkt_sock_sample.recv_packet_socket: Received 42 bytes
[00:01:39.530,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:40.200,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:40.550,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:41.570,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:42.590,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:43.610,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:45.210,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:50.220,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:53.270,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:54.290,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:55.230,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:01:55.310,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:56.330,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:57.350,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:01:58.370,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:02:00.240,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:05.250,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:10.260,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:15.270,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:20.280,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:25.290,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:25.730,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:02:26.750,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:02:27.770,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:02:28.790,000] <wrn> net_conn: pkt cloning failed, pkt 0x5645dbd534a0 dropped
[00:02:30.300,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:35.310,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:40.320,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:45.330,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:50.340,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:02:55.350,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:03:00.360,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:03:05.370,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:03:10.380,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:03:15.390,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:03:20.400,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:03:25.410,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:03:30.420,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes
[00:03:35.430,000] <dbg> net_pkt_sock_sample.send_packet_socket: Sent 100 bytes

Environment (please complete the following information):

• OS: Ubuntu 20.04
• Toolchain: Zephyr SDK 0.11.4
• Commit SHA: f59cba331553be094c23f1fb2839e76c403f6bfc (19.4.2021)