libbpf: Fix section counting logic

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e_shnum does include section #0 and as such is exactly the number of ELF
sections that we need to allocate memory for to use section indices as
array indices. Fix the off-by-one error.

This is purely accounting fix, previously we were overallocating one
too many array items. But no correctness errors otherwise.

Fixes: 25bbbd7a44 ("libbpf: Remove assumptions about uniqueness of .rodata/.data/.bss maps")
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/20211103173213.1376990-5-andrii@kernel.org

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Andrii Nakryiko 2021-11-03 10:32:12 -07:00 • committed by Alexei Starovoitov

parent 62554d52e7

commit 0d6988e16a

1 changed files with 4 additions and 4 deletions

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tools/lib/bpf/libbpf.c

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