libbpf: Improve sanity checking during BTF fix up

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If BTF is corrupted DATASEC's variable type ID might be incorrect.
Prevent this easy to detect situation with extra NULL check.
Reported by oss-fuzz project.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20211103173213.1376990-3-andrii@kernel.org

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Andrii Nakryiko 2021-11-03 10:32:10 -07:00 • committed by Alexei Starovoitov

parent 833907876b

commit 88918dc12d

1 changed files with 2 additions and 3 deletions

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tools/lib/bpf/libbpf.c

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