bpf: btf: Ensure the member->offset is in the right order

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This patch ensures the member->offset of a struct
is in the correct order (i.e the later member's offset cannot
go backward).

The current "pahole -J" BTF encoder does not generate something
like this.  However, checking this can ensure future encoder
will not violate this.

Fixes: 69b693f0ae ("bpf: btf: Introduce BPF Type Format (BTF)")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Martin KaFai Lau 2018-07-20 17:38:37 -07:00 • committed by Daniel Borkmann

parent 1a4f14bab1

commit 6283fa38dc

2 changed files with 41 additions and 1 deletions

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14

kernel/bpf/btf.c

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28

tools/testing/selftests/bpf/test_btf.c

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