diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index db5f56643b62..25ee8d9572c6 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -4602,13 +4602,23 @@ static int check_helper_mem_access(struct bpf_verifier_env *env, int regno,
 		return check_map_access(env, regno, reg->off, access_size,
 					zero_size_allowed);
 	case PTR_TO_MEM:
+		if (type_is_rdonly_mem(reg->type)) {
+			if (meta && meta->raw_mode) {
+				verbose(env, "R%d cannot write into %s\n", regno,
+					reg_type_str(env, reg->type));
+				return -EACCES;
+			}
+		}
 		return check_mem_region_access(env, regno, reg->off,
 					       access_size, reg->mem_size,
 					       zero_size_allowed);
 	case PTR_TO_BUF:
 		if (type_is_rdonly_mem(reg->type)) {
-			if (meta && meta->raw_mode)
+			if (meta && meta->raw_mode) {
+				verbose(env, "R%d cannot write into %s\n", regno,
+					reg_type_str(env, reg->type));
 				return -EACCES;
+			}
 
 			buf_info = "rdonly";
 			max_access = &env->prog->aux->max_rdonly_access;