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authorAndrii Nakryiko <andrii@kernel.org>2021-01-10 08:03:41 +0100
committerDaniel Borkmann <daniel@iogearbox.net>2021-01-12 21:12:05 +0100
commitb8d52264df85ec12f370c0a8b28d0ac59a05877a (patch)
treed3e86dc8fc134ff615c2ba7b70ae249167cf1829 /tools
parentbpf: Allow empty module BTFs (diff)
downloadlinux-b8d52264df85ec12f370c0a8b28d0ac59a05877a.tar.xz
linux-b8d52264df85ec12f370c0a8b28d0ac59a05877a.zip
libbpf: Allow loading empty BTFs
Empty BTFs do come up (e.g., simple kernel modules with no new types and strings, compared to the vmlinux BTF) and there is nothing technically wrong with them. So remove unnecessary check preventing loading empty BTFs. Fixes: d8123624506c ("libbpf: Fix BTF data layout checks and allow empty BTF") Reported-by: Christopher William Snowhill <chris@kode54.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210110070341.1380086-2-andrii@kernel.org
Diffstat (limited to 'tools')
-rw-r--r--tools/lib/bpf/btf.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 3c3f2bc6c652..9970a288dda5 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -240,11 +240,6 @@ static int btf_parse_hdr(struct btf *btf)
}
meta_left = btf->raw_size - sizeof(*hdr);
- if (!meta_left) {
- pr_debug("BTF has no data\n");
- return -EINVAL;
- }
-
if (meta_left < hdr->str_off + hdr->str_len) {
pr_debug("Invalid BTF total size:%u\n", btf->raw_size);
return -EINVAL;