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Message-ID: <CAJwJo6agHEsWjhNzAstwU_+kQd4er3QsNZebkCOCDGBGh4SiMQ@mail.gmail.com>
Date: Wed, 17 Apr 2024 23:30:29 +0100
From: Dmitry Safonov <0x7f454c46@...il.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Dmitry Safonov via B4 Relay <devnull+0x7f454c46.gmail.com@...nel.org>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>, netdev@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 0/4] selftests/net/tcp_ao: A bunch of fixes for TCP-AO selftests

On Wed, 17 Apr 2024 at 22:28, Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Wed, 17 Apr 2024 13:46:36 -0700 Jakub Kicinski wrote:
> > > I can spend some time on them after I verify that my fix for -stable
> > > is actually fixing an issue I think it fixes.
> > > Seems like your automation + my selftests are giving some fruits, hehe.
> >
> > Oh, very interesting, I don't recall these coming up before.
>
> Correction, these are old, and if I plug the branch names here:
> https://netdev.bots.linux.dev/contest.html
> there is a whole bunch of tests failing that day.

Hmm, yeah, I was looking at the history of selftests to see if there
is anything else interesting:

2024-04-11--15-00 - lockdep for hashinfo->ehash_locks vs tw->tw_timer

It seems that you actually reported that already here:
https://lore.kernel.org/all/20240411100536.224fa1e7@kernel.org/

2024-04-04--12-00 - lockdep for p->alloc_lock vs ul->lock
(rt6_uncached_list_flush_dev)
2024-04-04--09-00 - lockdep for p->alloc_lock vs ndev->lock
(addrconf_permanent_addr)
2024-04-04--03-00 - lockdep for p->alloc_lock vs ul->lock

Was reported as well:
https://lore.kernel.org/all/8576a80ac958812ac75b01299c2de3a6485f84a1.camel@redhat.com/

2024-03-06--00-00 - kernel BUG at net/core/skbuff.c:2813

Can't really track this down to any report/fix. Probably as it's month
old and hasn't happened since on these tests - something was borken on
that particular day.

> Keep in mind these run pre-commit so not all failures are flakes.

Thanks,
             Dmitry

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