fib_tests from net in ubuntu_kernel_selftests fails on Groovy

[Kelsey Steele]

fib_tests failing at "TEST: Single path route with IPv6 gateway - ping"

Seeing on Groovy/linux 5.8.0-51.57 on host riccioli. Passed on host vought

This passed last cycle, so may be a regression.

04/19 16:22:57 DEBUG| utils:0153| [stdout] # IPv4 route with IPv6 gateway tests
04/19 16:22:59 DEBUG| utils:0153| [stdout] # TEST: Single path route with IPv6 gateway [ OK ]
04/19 16:23:00 DEBUG| utils:0153| [stdout] # TEST: Single path route with IPv6 gateway - ping [FAIL]
04/19 16:23:00 DEBUG| utils:0153| [stdout] # TEST: Single path route delete [ OK ]
04/19 16:23:00 DEBUG| utils:0153| [stdout] # TEST: Multipath route add - v6 nexthop then v4 [ OK ]
04/19 16:23:00 DEBUG| utils:0153| [stdout] # TEST: Multipath route delete - nexthops in wrong order [ OK ]
04/19 16:23:00 DEBUG| utils:0153| [stdout] # TEST: Multipath route delete exact match [ OK ]
04/19 16:23:00 DEBUG| utils:0153| [stdout] # TEST: Multipath route add - v4 nexthop then v6 [ OK ]
04/19 16:23:00 DEBUG| utils:0153| [stdout] # TEST: Multipath route delete - nexthops in wrong order [ OK ]
04/19 16:23:00 DEBUG| utils:0153| [stdout] # TEST: Multipath route delete exact match [ OK ]
04/19 16:23:01 DEBUG| utils:0153| [stdout] #
04/19 16:23:01 DEBUG| utils:0153| [stdout] # IPv4 rp_filter tests
04/19 16:23:01 DEBUG| utils:0153| [stdout] # TEST: rp_filter passes local packets [ OK ]
04/19 16:23:01 DEBUG| utils:0153| [stdout] # TEST: rp_filter passes loopback packets [ OK ]
04/19 16:23:01 DEBUG| utils:0153| [stdout] #
04/19 16:23:01 DEBUG| utils:0153| [stdout] # IPv4 delete address route tests
04/19 16:23:02 DEBUG| utils:0153| [stdout] # TEST: Route removed from VRF when source address deleted [ OK ]
04/19 16:23:02 DEBUG| utils:0153| [stdout] # TEST: Route in default VRF not removed [ OK ]
04/19 16:23:02 DEBUG| utils:0153| [stdout] # TEST: Route removed in default VRF when source address deleted [ OK ]
04/19 16:23:02 DEBUG| utils:0153| [stdout] # TEST: Route in VRF is not removed by address delete [ OK ]
04/19 16:23:02 DEBUG| utils:0153| [stdout] #
04/19 16:23:02 DEBUG| utils:0153| [stdout] # Tests passed: 164
04/19 16:23:02 DEBUG| utils:0153| [stdout] # Tests failed: 1
04/19 16:23:02 DEBUG| utils:0153| [stdout] not ok 14 selftests: net: fib_tests.sh # exit=1

[Po-Hsu Lin (cypressyew)]

A manual test on riccioli didn't managed to reproduce this issue:
$ uname -a
Linux riccioli 5.8.0-51-generic #57-Ubuntu SMP Wed Apr 14 16:02:45 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
$ sudo ./fib_tests.sh
....
    TEST: Single path route with IPv6 gateway - ping [ OK ]
....
Tests passed: 165
Tests failed: 0

And it has passed with the net test run (please find attachment for the test log) with:
sudo make run_tests TARGETS=net
A glitch maybe?

[Po-Hsu Lin (cypressyew)]

Ran with autotest frame work, still unable to reproduce this issue.

[Guilherme G. Piccoli (gpiccoli)]

Another instance of this failure would be (detected on G/kvm, kernel 5.8):

03:39:31 DEBUG| [stdout] # selftests: net: fib-onlink-tests.sh
03:39:31 DEBUG| [stdout] # Error: ipv4: FIB table does not exist.
03:39:31 DEBUG| [stdout] # Flush terminated
03:39:31 DEBUG| [stdout] # Error: ipv6: FIB table does not exist.
03:39:31 DEBUG| [stdout] # Flush terminated
03:39:31 DEBUG| [stdout] #
03:39:31 DEBUG| [stdout] # ########################################
03:39:31 DEBUG| [stdout] # Configuring interfaces
03:39:31 DEBUG| [stdout] # Error: Unknown device type.
03:39:31 DEBUG| [stdout] not ok 15 selftests: net: fib-onlink-tests.sh # exit=2

[Guilherme G. Piccoli (gpiccoli)]

*Maybe* related with:

# grep -nrIi fib config-5.8.0-1026-kvm
918:# CONFIG_IP_FIB_TRIE_STATS is not set

# grep -nrIi fib config-5.8.0-50-generic
1101:CONFIG_IP_FIB_TRIE_STATS=y

[Guilherme G. Piccoli (gpiccoli)]

Another one found in G/kvm:

DEBUG| [stdout] # selftests: net: fib_rule_tests.sh
DEBUG| [stdout] # Error: Unknown device type.
DEBUG| [stdout] not ok 20 selftests: net: fib_rule_tests.sh # exit=2

[Guilherme G. Piccoli (gpiccoli)]

Observed on G/KVM, cycle sru-20210510 .

[Guilherme G. Piccoli (gpiccoli)]

Observed on G/KVM, cycle sru-20210531 .