[PATCH bpf-next 4/6] libbpf: don't enfore verifier log levels on libbpf side

Andrii Nakryiko
2023-03-28T23:57:17Z

This basically prevents any forward compatibility. And we either way
just return -EINVAL, which would otherwise be returned from bpf()
syscall anyways.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
tools/lib/bpf/bpf.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index e750b6f5fcc3..eb08a998b526 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -290,8 +290,6 @@ int bpf_prog_load(enum bpf_prog_type prog_type,

if (!!log_buf != !!log_size)
return libbpf_err(-EINVAL);
- if (log_level > (4 | 2 | 1))
- return libbpf_err(-EINVAL);
if (log_level && !log_buf)
return libbpf_err(-EINVAL);

--
2.34.1