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Message-ID: <63dddcc92fc31_6bb15208e9@john.notmuch>
Date: Fri, 03 Feb 2023 20:19:21 -0800
From: John Fastabend <john.fastabend@...il.com>
To: Hsin-Wei Hung <hsinweih@....edu>,
John Fastabend <john.fastabend@...il.com>,
Jakub Sitnicki <jakub@...udflare.com>
Cc: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: RE: A potential deadlock in sockhash map
Hsin-Wei Hung wrote:
> Hi,
>
> Our bpf runtime fuzzer (a customized syzkaller) triggered a lockdep warning
> in the bpf subsystem indicating a potential deadlock. We are able to
> trigger this bug on v5.15.25 and v5.19. The following code is a BPF PoC,
> and the lockdep warning is attached at the end.
Thanks, but can you test the latest kernel?
Or at least latest 5.15 stable, 5.15.25 is a bit old and is missing lots of
fixes. And 5.19 is not even a LTS so wouldn't have many fixes.
Ideally if possible testing bpf tree would be the most helpful.
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/
I believe we fixed a similar bug already so hoping this is just hitting an
already fixed bug. But, would be best to confirm thanks.
Thanks,
John
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