bpf: Remove a WARN_ON_ONCE warning related to local kptr

Currently, in function bpf_obj_free_fields(), for local kptr, a warning will be issued if the struct does not contain any special fields. But actually the kernel seems totally okay with a local kptr without any special fields. Permitting no special fields also aligns with future percpu kptr which also allows no special fields. Acked-by: Dave Marchevsky <[email protected]> Signed-off-by: Yonghong Song <[email protected]>
intel-lab-lkp · Aug 24, 2023 · b83603e · b83603e
1 parent f3bdb54
commit b83603e
Showing 1 changed file with 0 additions and 1 deletion.
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
@@ -657,7 +657,6 @@ void bpf_obj_free_fields(const struct btf_record *rec, void *obj)
 			if (!btf_is_kernel(field->kptr.btf)) {
 				pointee_struct_meta = btf_find_struct_meta(field->kptr.btf,
 									   field->kptr.btf_id);
-				WARN_ON_ONCE(!pointee_struct_meta);
 				migrate_disable();
 				__bpf_obj_drop_impl(xchgd_field, pointee_struct_meta ?
 								 pointee_struct_meta->record :