Control: found -1 5.19~rc4-1~exp1 Control: forwarded -1 https://lore.kernel.org/bpf/20230118051443.78988-1-alexei.starovoitov@gmail.com/ On Saturday, 25 March 2023 16:00:47 CET Florian Lehner wrote: > > 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 Thanks. Then the most likely case was that it was introduced in the 5.19 merge window and thus also present in 5.19-rc1, but there isn't a prebuild kernel to verify. > > > 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.starovoitov@gmail. > com/. With the provided patch applied I no longer mange to freeze the > system. I see you already responded to that thread, excellent :-) Hopefully they'll read this whole bug report, but mentioning that your actual problem was NOT triggered till 5.18, but did trigger from 5.19-rc4 and later, could be useful. I may not fully understand what upstream talked about, but I only saw a reference to a 6.0.0 kernel. Thanks for testing and reporting back :-)
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