diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index b3fddfb5bc84..33bb8ae4a804 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -5576,12 +5576,53 @@ static u32 *reg2btf_ids[__BPF_REG_TYPE_MAX] = {
 #endif
 };
 
+/* Returns true if struct is composed of scalars, 4 levels of nesting allowed */
+static bool __btf_type_is_scalar_struct(struct bpf_verifier_log *log,
+					const struct btf *btf,
+					const struct btf_type *t, int rec)
+{
+	const struct btf_type *member_type;
+	const struct btf_member *member;
+	u32 i;
+
+	if (!btf_type_is_struct(t))
+		return false;
+
+	for_each_member(i, t, member) {
+		const struct btf_array *array;
+
+		member_type = btf_type_skip_modifiers(btf, member->type, NULL);
+		if (btf_type_is_struct(member_type)) {
+			if (rec >= 3) {
+				bpf_log(log, "max struct nesting depth exceeded\n");
+				return false;
+			}
+			if (!__btf_type_is_scalar_struct(log, btf, member_type, rec + 1))
+				return false;
+			continue;
+		}
+		if (btf_type_is_array(member_type)) {
+			array = btf_type_array(member_type);
+			if (!array->nelems)
+				return false;
+			member_type = btf_type_skip_modifiers(btf, array->type, NULL);
+			if (!btf_type_is_scalar(member_type))
+				return false;
+			continue;
+		}
+		if (!btf_type_is_scalar(member_type))
+			return false;
+	}
+	return true;
+}
+
 static int btf_check_func_arg_match(struct bpf_verifier_env *env,
 				    const struct btf *btf, u32 func_id,
 				    struct bpf_reg_state *regs,
 				    bool ptr_to_mem_ok)
 {
 	struct bpf_verifier_log *log = &env->log;
+	bool is_kfunc = btf_is_kernel(btf);
 	const char *func_name, *ref_tname;
 	const struct btf_type *t, *ref_t;
 	const struct btf_param *args;
@@ -5634,7 +5675,20 @@ static int btf_check_func_arg_match(struct bpf_verifier_env *env,
 
 		ref_t = btf_type_skip_modifiers(btf, t->type, &ref_id);
 		ref_tname = btf_name_by_offset(btf, ref_t->name_off);
-		if (btf_is_kernel(btf)) {
+		if (btf_get_prog_ctx_type(log, btf, t,
+					  env->prog->type, i)) {
+			/* If function expects ctx type in BTF check that caller
+			 * is passing PTR_TO_CTX.
+			 */
+			if (reg->type != PTR_TO_CTX) {
+				bpf_log(log,
+					"arg#%d expected pointer to ctx, but got %s\n",
+					i, btf_type_str(t));
+				return -EINVAL;
+			}
+			if (check_ctx_reg(env, reg, regno))
+				return -EINVAL;
+		} else if (is_kfunc && (reg->type == PTR_TO_BTF_ID || reg2btf_ids[reg->type])) {
 			const struct btf_type *reg_ref_t;
 			const struct btf *reg_btf;
 			const char *reg_ref_tname;
@@ -5650,14 +5704,9 @@ static int btf_check_func_arg_match(struct bpf_verifier_env *env,
 			if (reg->type == PTR_TO_BTF_ID) {
 				reg_btf = reg->btf;
 				reg_ref_id = reg->btf_id;
-			} else if (reg2btf_ids[reg->type]) {
+			} else {
 				reg_btf = btf_vmlinux;
 				reg_ref_id = *reg2btf_ids[reg->type];
-			} else {
-				bpf_log(log, "kernel function %s args#%d expected pointer to %s %s but R%d is not a pointer to btf_id\n",
-					func_name, i,
-					btf_type_str(ref_t), ref_tname, regno);
-				return -EINVAL;
 			}
 
 			reg_ref_t = btf_type_skip_modifiers(reg_btf, reg_ref_id,
@@ -5673,23 +5722,24 @@ static int btf_check_func_arg_match(struct bpf_verifier_env *env,
 					reg_ref_tname);
 				return -EINVAL;
 			}
-		} else if (btf_get_prog_ctx_type(log, btf, t,
-						 env->prog->type, i)) {
-			/* If function expects ctx type in BTF check that caller
-			 * is passing PTR_TO_CTX.
-			 */
-			if (reg->type != PTR_TO_CTX) {
-				bpf_log(log,
-					"arg#%d expected pointer to ctx, but got %s\n",
-					i, btf_type_str(t));
-				return -EINVAL;
-			}
-			if (check_ctx_reg(env, reg, regno))
-				return -EINVAL;
 		} else if (ptr_to_mem_ok) {
 			const struct btf_type *resolve_ret;
 			u32 type_size;
 
+			if (is_kfunc) {
+				/* Permit pointer to mem, but only when argument
+				 * type is pointer to scalar, or struct composed
+				 * (recursively) of scalars.
+				 */
+				if (!btf_type_is_scalar(ref_t) &&
+				    !__btf_type_is_scalar_struct(log, btf, ref_t, 0)) {
+					bpf_log(log,
+						"arg#%d pointer type %s %s must point to scalar or struct with scalar\n",
+						i, btf_type_str(ref_t), ref_tname);
+					return -EINVAL;
+				}
+			}
+
 			resolve_ret = btf_resolve_size(btf, ref_t, &type_size);
 			if (IS_ERR(resolve_ret)) {
 				bpf_log(log,
@@ -5702,6 +5752,8 @@ static int btf_check_func_arg_match(struct bpf_verifier_env *env,
 			if (check_mem_reg(env, reg, regno, type_size))
 				return -EINVAL;
 		} else {
+			bpf_log(log, "reg type unsupported for arg#%d %sfunction %s#%d\n", i,
+				is_kfunc ? "kernel " : "", func_name, func_id);
 			return -EINVAL;
 		}
 	}
@@ -5751,7 +5803,7 @@ int btf_check_kfunc_arg_match(struct bpf_verifier_env *env,
 			      const struct btf *btf, u32 func_id,
 			      struct bpf_reg_state *regs)
 {
-	return btf_check_func_arg_match(env, btf, func_id, regs, false);
+	return btf_check_func_arg_match(env, btf, func_id, regs, true);
 }
 
 /* Convert BTF of a function into bpf_reg_state if possible