netdev - Re: BUG: tools/testing/selftests/net/l2_tos_ttl_inherit.sh hangs when selftest restarted

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Date:   Sun, 8 Jan 2023 15:49:05 +0100
From:   Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>
To:     Guillaume Nault <gnault@...hat.com>
Cc:     linux-kselftest@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matthias May <matthias.may@...termo.com>
Subject: Re: BUG: tools/testing/selftests/net/l2_tos_ttl_inherit.sh hangs when
 selftest restarted

On 08. 01. 2023. 15:04, Guillaume Nault wrote:

> For some reasons, your host doesn't accept the VXLAN packets received
> over veth0. I guess there are some firewalling rules incompatible with
> this tests script.

That beats me. It is essentially a vanilla desktop AlmaLinux (CentOS fork)
installation w 6.2-rc2 vanilla torvalds tree kernel.

Maybe DHCPv4+DHCPv6 assigned address got in the way?

>>> -------- >8 --------
>>>
>>> Isolate testing environment and ensure everything is cleaned up on
>>> exit.
>>>
>>> diff --git a/tools/testing/selftests/net/l2_tos_ttl_inherit.sh b/tools/testing/selftests/net/l2_tos_ttl_inherit.sh
> 
>> Wow, Guillaueme, this patch actually made things unstuck :)
> 
> Great! The patch isolates the testing environment, making it less
> dependent from the host that runs it. So the routing and firewalling
> configurations don't interfere anymore.

:)

>> The entire tools/tests/selftests/net section now had a PASS w "OK", save for a couple of tests here:
>>
>> not ok 1 selftests: nci: nci_dev # exit=1
>> not ok 12 selftests: net: nat6to4.o
>> not ok 13 selftests: net: run_netsocktests # exit=1
>> not ok 29 selftests: net: udpgro_bench.sh # exit=255
>> not ok 30 selftests: net: udpgro.sh # exit=255
>> not ok 37 selftests: net: fcnal-test.sh # TIMEOUT 1500 seconds
>> not ok 38 selftests: net: l2tp.sh # exit=2
>> not ok 46 selftests: net: icmp_redirect.sh # exit=1
>> not ok 55 selftests: net: vrf_route_leaking.sh # exit=1
>> not ok 59 selftests: net: udpgro_fwd.sh # exit=1
>> not ok 60 selftests: net: udpgro_frglist.sh # exit=255
>> not ok 61 selftests: net: veth.sh # exit=1
>> not ok 68 selftests: net: srv6_end_dt46_l3vpn_test.sh # exit=1
>> not ok 69 selftests: net: srv6_end_dt4_l3vpn_test.sh # exit=1
>> not ok 75 selftests: net: arp_ndisc_evict_nocarrier.sh # exit=255
>> not ok 83 selftests: net: test_ingress_egress_chaining.sh # exit=1
>> not ok 1 selftests: net/hsr: hsr_ping.sh # TIMEOUT 45 seconds
>> not ok 3 selftests: net/mptcp: mptcp_join.sh # exit=1
>>
>> If you are interested in additional diagnostics, this is a very interesting part of the
>> Linux kernel testing ...
>>
>> There was apparent hang in selftest/net/fcnal-test.sh as well.
>> I can help you with the diagnostics if you wish? Thanks.
>>
>> If I could make them all work both on Ubuntu 22.10 kinetic kudu and AlmaLinux 8.7
>> stone smilodon (CentOS fork), this would be a milestone for me :)
> 
> I'm surprised you have so many failures. Feel free to report them
> individually. Don't forget to Cc the authors of the scripts. Just
> pay attention not to overwhelm people.

Sure. I have already submitted half a dozen and I already feel the backlash,
"wear and tear" :)

But it is a good brainstorming session for me.

I realise that developers receive a lot of bug reports from the volume of LKML.

> I can probably help with the l2tp.sh failure and maybe with the
> fcnal-test.sh hang. Please report them in their own mail thread.

Then I will Cc: you for sure on those two.

But I cannot promise that this will be today. In fact, tomorrow is prognosed
rain so I'd better use the remaining blue-sky-patched day to do some biking ;-)

Anyway, I haven't received feedback from all submitted bug reports, so my stack
is near the overload. However, I made the "make kselftest" complete on both boxes
(and OSs of Debian and RH lineage), so I already feel some accomplishment :)

Maybe some issues will be fixed in today's release candidate, anyway.

Mirsad 

-- 
Mirsad Goran Todorovac
Sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu
 
System engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb, Republic of Croatia
The European Union