net: icmp: assert triggered sending icmp echo response with CONFIG_NET_STATISTICS=y #107920

Describe the bug

An assertion is triggered in

The issue occurs in the following logic:

1. An ICMP echo response is generated.
2. The packet (reply) is processed and subsequently freed by the network stack after net_try_send_data().
3. The statistics update function is called: net_stats_update_icmp_sent(net_pkt_iface(reply)).
4. Since reply is already freed, net_pkt_iface(reply) returns NULL.

Regression

• This is a regression.

Steps to reproduce

1. CONFIG_NET_STATISTICS=y + CONFIG_ASSERT=y
2. Send ICMP requests
3. Observe assertion

Relevant log output

Impact

Functional Limitation – Some features not working as expected, but system usable.

Environment

• OS: Linux
• Toolchain: Zephyr SDK 1.0.1
• Version: 4.4.0

Additional Context

No response