diff options
| author | Andrii Nakryiko <andrii@kernel.org> | 2021-01-09 23:03:41 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-01-12 21:12:05 +0100 |
| commit | b8d52264df85ec12f370c0a8b28d0ac59a05877a (patch) | |
| tree | d3e86dc8fc134ff615c2ba7b70ae249167cf1829 | |
| parent | bcc5e6162d66d44f7929f30fce032f95855fc8b4 (diff) | |
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
| -rw-r--r-- | tools/lib/bpf/btf.c | 5 |
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; |