Re: [PATCH AUTOSEL 6.2 08/30] selftests/bpf: check that modifier resolves after pointer

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On Wed, May 24, 2023 at 5:04 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> Great, any specific commits that fix this issue would be appreciated to
> be pointed at so we can apply them.

The problem was introduced by commit f4b8c0710ab6 ("selftests/bpf: Add
verifier test for release_reference()") in your tree. Seems like
fixup_map_ringbuf was introduced in upstream commit 4237e9f4a962
("selftests/bpf: Add verifier test for PTR_TO_MEM spill") but that
wasn't backported.

To restate my original question: how can we avoid breaking BPF
selftests? From personal experience this happens somewhat regularly.

Best
Lorenz




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