[PATCH 05/12] ASoC: Intel: avs: Shield LARGE_CONFIG_GETs against zero payload_size

[Cezary Rojewski <cezary.rojewski@intel.com>]

Some LARGE_CONFIG_GETs are never expected to return payload of size 0.
Check for such situation and collapse if met.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/messages.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sound/soc/intel/avs/messages.c b/sound/soc/intel/avs/messages.c
index 3559fb496e0b..9cf621eaec5a 100644
--- a/sound/soc/intel/avs/messages.c
+++ b/sound/soc/intel/avs/messages.c
@@ -474,6 +474,9 @@ int avs_ipc_get_fw_config(struct avs_dev *adev, struct avs_fw_cfg *cfg)
 				       &payload, &payload_size);
 	if (ret)
 		return ret;
+	/* Non-zero payload expected for FIRMWARE_CONFIG. */
+	if (!payload_size)
+		return -EREMOTEIO;
 
 	while (offset < payload_size) {
 		tlv = (struct avs_tlv *)(payload + offset);
@@ -587,6 +590,9 @@ int avs_ipc_get_hw_config(struct avs_dev *adev, struct avs_hw_cfg *cfg)
 				       &payload, &payload_size);
 	if (ret)
 		return ret;
+	/* Non-zero payload expected for HARDWARE_CONFIG. */
+	if (!payload_size)
+		return -EREMOTEIO;
 
 	while (offset < payload_size) {
 		tlv = (struct avs_tlv *)(payload + offset);
@@ -670,6 +676,9 @@ int avs_ipc_get_modules_info(struct avs_dev *adev, struct avs_mods_info **info)
 				       &payload, &payload_size);
 	if (ret)
 		return ret;
+	/* Non-zero payload expected for MODULES_INFO. */
+	if (!payload_size)
+		return -EREMOTEIO;
 
 	*info = (struct avs_mods_info *)payload;
 	return 0;
-- 
2.25.1