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Ian Rogers authored
Avoids a segv if btf isn't present. Seen on the call path __bpf_object__open calling bpf_object__collect_externs. Fixes: 5bd022ec (libbpf: Support extern kernel function) Suggested-by:
Stanislav Fomichev <sdf@google.com> Suggested-by:
Petar Penkov <ppenkov@google.com> Signed-off-by:
Ian Rogers <irogers@google.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210504234910.976501-1-irogers@google.com
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