Subject: Re: A potential deadlock in sockhash map

From: Jakub Sitnicki <[email-masked]>
Date: Thu, 23 Feb 2023 14:17:54 +0100

Hi,

On Mon, Feb 20, 2023 at 07:39 AM -06, Hsin-Wei Hung wrote:
> I think my previous report got blocked since it contained HTML
> subparts so I am sending it again. 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.

Not sure if you've seen John's reply to the previous report:

https://lore.kernel.org/all/[email-masked]/

Are you also fuzzing any newer kernel versions? Or was v5.19 the latest?

Did syzkaller find a reproducer?

Thanks,
Jakub