On Fri, 24 Mar 2023 13:50:15 +0100 Diederik de Haas
<didi.deb...@cknow.org> wrote:
On Friday, 24 March 2023 12:44:33 CET Tim Rühsen wrote:
> Package: linux-image-amd64
> Version: 6.1.20-1
>
> We run a priviledged eBPF based tool with a communication between kernel and
> user space. It runs without issues on kernels 4.15 to 5.18.
> On kernels 5.19+, the whole system freezes after a few minutes.
Via https://snapshot.debian.org/binary/linux-image-amd64/ you can easily test
various kernel versions. Could you try whether 5.19~rc4-1~exp1 indeed produces
the problem?
Yes - I can reproduce the total system freeze with 5.19~rc4-1~exp1
(2022-07-01) from
https://snapshot.debian.org/package/linux-signed-amd64/5.19~rc4%2B1~exp1/.
> Since the running program is rather complex, it is not easily possible to
> carve out a small reproducer. We can provide gdb backtraces from freezes
> inside qemu.
Someone else would have to chime in for the backtraces; that's beyond my skill
set.
I just learned about
https://lore.kernel.org/bpf/20230118051443.78988-1-alexei.starovoi...@gmail.com/.
With the provided patch applied I no longer mange to freeze the system.
- florian
