libbpf: Don't return -EINVAL if hdr_len < offsetofend(core_relo_len)
Since core relos is an optional part of the .BTF.ext ELF section, we should
skip parsing it instead of returning -EINVAL if header size is less than
offsetofend(struct btf_ext_header, core_relo_len).
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220404005320.1723055-1-ytcoode@gmail.com
diff --git a/src/btf.c b/src/btf.c
index 1383e26..d124e9e 100644
--- a/src/btf.c
+++ b/src/btf.c
@@ -2826,10 +2826,8 @@
if (err)
goto done;
- if (btf_ext->hdr->hdr_len < offsetofend(struct btf_ext_header, core_relo_len)) {
- err = -EINVAL;
- goto done;
- }
+ if (btf_ext->hdr->hdr_len < offsetofend(struct btf_ext_header, core_relo_len))
+ goto done; /* skip core relos parsing */
err = btf_ext_setup_core_relos(btf_ext);
if (err)
