regression 1016: add a subtest for non-NULL memref of size 0

Add a subtest to assert that the implementation allows to forward non-NULL memref from a TA to another TA. Regression 1016 already contains tests related to forwarding memref between TAs. Thus extend this existing test with the subtest described above instead of writing a new one. The Global Platform specification allows this, however, at the time of writing, optee-os will panic. A fix is proposed at [1]. [1] core: tee_svc.c: allow to pass non-NULL memref of size 0 Link: OP-TEE/optee_os#6405 Signed-off-by: Vincent Mailhol <[email protected]> Reviewed-by: Etienne Carriere <[email protected]> Reviewed-by: Jens Wiklander <[email protected]>
OP-TEE · Nov 20, 2023 · 3aea377 · 3aea377
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diff --git a/host/xtest/regression_1000.c b/host/xtest/regression_1000.c
@@ -1377,6 +1377,7 @@ static void xtest_tee_test_1016(ADBG_Case_t *c)
 	TEEC_Session session = { };
 	TEEC_Operation op = TEEC_OPERATION_INITIALIZER;
 	uint32_t ret_orig = 0;
+	int dummy = 0;
 
 	if (!ADBG_EXPECT_TEEC_SUCCESS(c,
 		xtest_teec_open_session(&session, &os_test_ta_uuid, NULL,
@@ -1390,6 +1391,24 @@ static void xtest_tee_test_1016(ADBG_Case_t *c)
 		TEEC_InvokeCommand(&session, TA_OS_TEST_CMD_TA2TA_MEMREF, &op,
 				   &ret_orig));
 
+	op.paramTypes = TEEC_PARAM_TYPES(TEEC_MEMREF_TEMP_INPUT,
+					 TEEC_MEMREF_TEMP_INOUT,
+					 TEEC_MEMREF_TEMP_OUTPUT,
+					 TEEC_NONE);
+
+	op.params[0].tmpref.buffer = &dummy;
+	op.params[0].tmpref.size = 0;
+
+	op.params[1].tmpref.buffer = &dummy;
+	op.params[1].tmpref.size = 0;
+
+	op.params[2].tmpref.buffer = &dummy;
+	op.params[2].tmpref.size = 0;
+
+	(void)ADBG_EXPECT_TEEC_SUCCESS(c,
+		TEEC_InvokeCommand(&session, TA_OS_TEST_CMD_TA2TA_MEMREF_SIZE0,
+				   &op, &ret_orig));
+
 	TEEC_CloseSession(&session);
 }
 ADBG_CASE_DEFINE(regression, 1016, xtest_tee_test_1016,

diff --git a/ta/os_test/include/os_test.h b/ta/os_test/include/os_test.h
@@ -20,6 +20,8 @@ TEE_Result ta_entry_bad_mem_access(uint32_t param_types, TEE_Param params[4]);
 TEE_Result ta_entry_ta2ta_memref(uint32_t param_types, TEE_Param params[4]);
 TEE_Result ta_entry_ta2ta_memref_mix(uint32_t param_types,
 				     TEE_Param params[4]);
+TEE_Result ta_entry_ta2ta_memref_size0(uint32_t param_types,
+				       TEE_Param params[4]);
 TEE_Result ta_entry_params(uint32_t param_types, TEE_Param params[4]);
 TEE_Result ta_entry_null_memref(uint32_t param_types, TEE_Param params[4]);
 TEE_Result ta_entry_call_lib(uint32_t param_types, TEE_Param params[4]);

diff --git a/ta/os_test/include/ta_os_test.h b/ta/os_test/include/ta_os_test.h
@@ -46,5 +46,6 @@
 #define TA_OS_TEST_CMD_MEMTAG_INVALID_TAG   34
 #define TA_OS_TEST_CMD_MEMTAG_DOUBLE_FREE   35
 #define TA_OS_TEST_CMD_MEMTAG_BUFFER_OVERRUN 36
+#define TA_OS_TEST_CMD_TA2TA_MEMREF_SIZE0   37
 
 #endif /*TA_OS_TEST_H */
diff --git a/ta/os_test/os_test.c b/ta/os_test/os_test.c
@@ -1171,6 +1171,48 @@ TEE_Result ta_entry_ta2ta_memref(uint32_t param_types, TEE_Param params[4])
 }
 #undef TA2TA_BUF_SIZE
 
+TEE_Result ta_entry_ta2ta_memref_size0(uint32_t param_types, TEE_Param params[4])
+{
+	static const TEE_UUID test_uuid = TA_OS_TEST_UUID;
+	TEE_TASessionHandle sess = TEE_HANDLE_NULL;
+	uint32_t ret_orig = 0;
+	TEE_Result res = TEE_ERROR_GENERIC;
+
+	if (param_types != TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INPUT,
+					   TEE_PARAM_TYPE_MEMREF_INOUT,
+					   TEE_PARAM_TYPE_MEMREF_OUTPUT,
+					   TEE_PARAM_TYPE_NONE))
+		return TEE_ERROR_BAD_PARAMETERS;
+
+	/*
+	 * This test expects all memory references to be non-NULL but
+	 * all sizes to be zero.
+	 */
+	if (!params[0].memref.buffer || params[0].memref.size ||
+	    !params[1].memref.buffer || params[1].memref.size ||
+	    !params[2].memref.buffer || params[2].memref.size)
+		return TEE_ERROR_BAD_PARAMETERS;
+
+	res = TEE_OpenTASession(&test_uuid, TEE_TIMEOUT_INFINITE, 0, NULL,
+				&sess, &ret_orig);
+	if (res != TEE_SUCCESS) {
+		EMSG("TEE_OpenTASession failed");
+		return res;
+	}
+
+	/*
+	 * TA basically does nothing. The actual test just consists
+	 * into validating that passing non-NULL memref of size zero
+	 * does not panic.
+	 */
+	res = TEE_InvokeTACommand(sess, TEE_TIMEOUT_INFINITE,
+				  TA_OS_TEST_CMD_TA2TA_MEMREF_MIX,
+				  param_types, params, &ret_orig);
+
+	TEE_CloseTASession(sess);
+	return res;
+}
+
 TEE_Result ta_entry_ta2ta_memref_mix(uint32_t param_types, TEE_Param params[4])
 {
 	uint8_t *in = NULL;

diff --git a/ta/os_test/ta_entry.c b/ta/os_test/ta_entry.c
@@ -92,6 +92,9 @@ TEE_Result TA_InvokeCommandEntryPoint(void *pSessionContext,
 	case TA_OS_TEST_CMD_TA2TA_MEMREF:
 		return ta_entry_ta2ta_memref(nParamTypes, pParams);
 
+	case TA_OS_TEST_CMD_TA2TA_MEMREF_SIZE0:
+		return ta_entry_ta2ta_memref_size0(nParamTypes, pParams);
+
 	case TA_OS_TEST_CMD_TA2TA_MEMREF_MIX:
 		return ta_entry_ta2ta_memref_mix(nParamTypes, pParams);