bpf: fix 32-bit ALU op verification
32-bit ALU ops operate on 32-bit values and have 32-bit outputs. Adjust the verifier accordingly. Fixes: f1174f77 ("bpf/verifier: rework value tracking") Signed-off-by: NJann Horn <jannh@google.com> Signed-off-by: NAlexei Starovoitov <ast@kernel.org> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
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