Currently we forbid 0-sized parameters and complain that the function
has a malformed void argument, however now that we can handle 0-sized
structs using BPF_PROG2(), carve out an exception for them.
Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
---
kernel/bpf/btf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 6b21ca67070c..dc18a646b98a 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -7385,7 +7385,7 @@ int btf_distill_func_proto(struct bpf_verifier_log *log,
tname, i, btf_type_str(t));
return -EINVAL;
}
- if (ret == 0) {
+ if (ret == 0 && !__btf_type_is_struct(t)) {
bpf_log(log,
"The function %s has malformed void argument.\n",
tname);
--
2.39.3
