From: Martin KaFai Lau <martin.lau@xxxxxxxxxx>
Passing -1 in value_type_btf_obj_fd to the kernel will break backward
compatibility. This patch fixes it by using 0 as the default.
Cc: Kui-Feng Lee <thinker.li@xxxxxxxxx>
Reported-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Fixes: 9e926acda0c2 ("libbpf: Find correct module BTFs for struct_ops maps and progs.")
Signed-off-by: Martin KaFai Lau <martin.lau@xxxxxxxxxx>
---
tools/lib/bpf/bpf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 3a35472a17c5..b133acfe08fb 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -192,7 +192,7 @@ int bpf_map_create(enum bpf_map_type map_type,
attr.btf_key_type_id = OPTS_GET(opts, btf_key_type_id, 0);
attr.btf_value_type_id = OPTS_GET(opts, btf_value_type_id, 0);
attr.btf_vmlinux_value_type_id = OPTS_GET(opts, btf_vmlinux_value_type_id, 0);
- attr.value_type_btf_obj_fd = OPTS_GET(opts, value_type_btf_obj_fd, -1);
+ attr.value_type_btf_obj_fd = OPTS_GET(opts, value_type_btf_obj_fd, 0);
attr.inner_map_fd = OPTS_GET(opts, inner_map_fd, 0);
attr.map_flags = OPTS_GET(opts, map_flags, 0);
--
2.34.1
