net: ipv6: net.ipv6.privacy_extension.prefer_{public | temporary} fail

[katgiadla]

Describe the bug
Tests:

• tests/net/ipv6/net.ipv6.privacy_extension.prefer_public
• tests/net/ipv6/net.ipv6.privacy_extension.prefer_temporary
  fail.

Observed for nrf52840dk/nrf52840.

To Reproduce
Steps to reproduce the behavior:

1. have nrf52840dk/nrf52840 connected
2. go to your zephyr dir
3. call ./scripts/twister -T tests/net/ipv6/ -p nrf52840dk/nrf52840 --device-testing --device-serial /dev/ttyACM0 -v --inline-logs
4. See console output with error

Expected behavior
Valid console output

Impact
Not clear

Logs and console output

*** Booting Zephyr OS build v3.6.0-3506-g3d76e498e947 ***
Running TESTSUITE net_ipv6
===================================================================
START - test_address_lifetime
PASS - test_address_lifetime in 0.201 seconds
===================================================================
START - test_change_ll_addr
PASS - test_change_ll_addr in 0.002 seconds
===================================================================
START - test_cmp_prefix
PASS - test_cmp_prefix in 0.001 seconds
===================================================================
START - test_dad_timeout
PASS - test_dad_timeout in 0.222 seconds
===================================================================
START - test_dst_iface_scope_mcast_recv
PASS - test_dst_iface_scope_mcast_recv in 0.001 seconds
===================================================================
START - test_dst_iface_scope_mcast_send
PASS - test_dst_iface_scope_mcast_send in 0.001 seconds
===================================================================
START - test_dst_is_other_iface_mcast_recv
PASS - test_dst_is_other_iface_mcast_recv in 0.001 seconds
===================================================================
START - test_dst_localaddr_recv
PASS - test_dst_localaddr_recv in 0.001 seconds
===================================================================
START - test_dst_org_scope_mcast_recv
PASS - test_dst_org_scope_mcast_recv in 0.001 seconds
===================================================================
START - test_dst_site_scope_mcast_recv_drop
PASS - test_dst_site_scope_mcast_recv_drop in 0.001 seconds
===================================================================
START - test_dst_site_scope_mcast_recv_ok
PASS - test_dst_site_scope_mcast_recv_ok in 0.002 seconds
===================================================================
START - test_dst_unknown_group_mcast_recv
PASS - test_dst_unknown_group_mcast_recv in 0.001 seconds
===================================================================
START - test_dst_zero_scope_mcast_recv
PASS - test_dst_zero_scope_mcast_recv in 0.001 seconds
===================================================================
START - test_hbho_message
PASS - test_hbho_message in 0.001 seconds
===================================================================
START - test_hbho_message_1
PASS - test_hbho_message_1 in 0.001 seconds
===================================================================
START - test_hbho_message_2
PASS - test_hbho_message_2 in 0.001 seconds
===================================================================
START - test_hbho_message_3
PASS - test_hbho_message_3 in 0.001 seconds
===================================================================
START - test_nd_reachability_hint
PASS - test_nd_reachability_hint in 0.001 seconds
===================================================================
START - test_no_nd_flag
PASS - test_no_nd_flag in 0.011 seconds
===================================================================
START - test_prefix_timeout
PASS - test_prefix_timeout in 2.001 seconds
===================================================================
START - test_prefix_timeout_long
PASS - test_prefix_timeout_long in 0.001 seconds
===================================================================
START - test_rs_ra_message
Assertion failed at ../../../../../../zephyr/tests/net/ipv6/src/main.c:731: ra_message: (!net_if_ipv6_router_lookup(TEST_NET_IF, &addr) is true)
Router fe80::260:97ff:fe07:69ea should be here
FAIL - test_rs_ra_message in 0.022 seconds
===================================================================
START - test_send_ns_extra_options
PASS - test_send_ns_extra_options in 0.001 seconds
===================================================================
START - test_send_ns_no_options
PASS - test_send_ns_no_options in 0.001 seconds
===================================================================
START - test_src_localaddr_recv
PASS - test_src_localaddr_recv in 0.001 seconds
===================================================================
START - test_y_dst_unjoined_group_mcast_recv
PASS - test_y_dst_unjoined_group_mcast_recv in 0.001 seconds
===================================================================
START - test_z_privacy_extension_01
PASS - test_z_privacy_extension_01 in 0.001 seconds
===================================================================
START - test_z_privacy_extension_02_filters
PASS - test_z_privacy_extension_02_filters in 0.517 seconds
===================================================================
START - test_z_privacy_extension_03_get_addr
PASS - test_z_privacy_extension_03_get_addr in 0.001 seconds
===================================================================
TESTSUITE net_ipv6 failed.
------ TESTSUITE SUMMARY START ------
SUITE FAIL -  96.55% [net_ipv6]: pass = 28, fail = 1, skip = 0, total = 29 duration = 2.999 seconds
- PASS - [net_ipv6.test_address_lifetime] duration = 0.201 seconds
- PASS - [net_ipv6.test_change_ll_addr] duration = 0.002 seconds
- PASS - [net_ipv6.test_cmp_prefix] duration = 0.001 seconds
- PASS - [net_ipv6.test_dad_timeout] duration = 0.222 seconds
- PASS - [net_ipv6.test_dst_iface_scope_mcast_recv] duration = 0.001 seconds
- PASS - [net_ipv6.test_dst_iface_scope_mcast_send] duration = 0.001 seconds
- PASS - [net_ipv6.test_dst_is_other_iface_mcast_recv] duration = 0.001 seconds
- PASS - [net_ipv6.test_dst_localaddr_recv] duration = 0.001 seconds
- PASS - [net_ipv6.test_dst_org_scope_mcast_recv] duration = 0.001 seconds
- PASS - [net_ipv6.test_dst_site_scope_mcast_recv_drop] duration = 0.001 seconds
- PASS - [net_ipv6.test_dst_site_scope_mcast_recv_ok] duration = 0.002 seconds
- PASS - [net_ipv6.test_dst_unknown_group_mcast_recv] duration = 0.001 seconds
- PASS - [net_ipv6.test_dst_zero_scope_mcast_recv] duration = 0.001 seconds
- PASS - [net_ipv6.test_hbho_message] duration = 0.001 seconds
- PASS - [net_ipv6.test_hbho_message_1] duration = 0.001 seconds
- PASS - [net_ipv6.test_hbho_message_2] duration = 0.001 seconds
- PASS - [net_ipv6.test_hbho_message_3] duration = 0.001 seconds
- PASS - [net_ipv6.test_nd_reachability_hint] duration = 0.001 seconds
- PASS - [net_ipv6.test_no_nd_flag] duration = 0.011 seconds
- PASS - [net_ipv6.test_prefix_timeout] duration = 2.001 seconds
- PASS - [net_ipv6.test_prefix_timeout_long] duration = 0.001 seconds
- FAIL - [net_ipv6.test_rs_ra_message] duration = 0.022 seconds
- PASS - [net_ipv6.test_send_ns_extra_options] duration = 0.001 seconds
- PASS - [net_ipv6.test_send_ns_no_options] duration = 0.001 seconds
- PASS - [net_ipv6.test_src_localaddr_recv] duration = 0.001 seconds
- PASS - [net_ipv6.test_y_dst_unjoined_group_mcast_recv] duration = 0.001 seconds
- PASS - [net_ipv6.test_z_privacy_extension_01] duration = 0.001 seconds
- PASS - [net_ipv6.test_z_privacy_extension_02_filters] duration = 0.517 seconds
- PASS - [net_ipv6.test_z_privacy_extension_03_get_addr] duration = 0.001 seconds
------ TESTSUITE SUMMARY END ------
===================================================================
RunID: d0109d105cc4fb6aed90d217885eb3c5
PROJECT EXECUTION FAILED

Environment (please complete the following information):

• OS: Ubuntu 20.04.1 LTS
• Toolchain: Zephyr SDK 0.16.5-1
• Commit SHA or Version used: v3.6.0-3506-g3d76e498e947