wifi: iwlwifi: check for kmemdup() return value in iwl_parse_tlv_firmware()

In 'iwl_parse_tlv_firmware()', check for 'kmemdup()' return value
when handling IWL_UCODE_TLV_CURRENT_PC and set the number of parsed
entries only if an allocation was successful (just like it does with
handling IWL_UCODE_TLV_CMD_VERSIONS above). Compile tested only.
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Acked-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20231009170453.149905-1-dmantipov@yandex.ruSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-drv.c

@@ -1303,10 +1303,12 @@ static int iwl_parse_tlv_firmware(struct iwl_drv *drv,
 		case IWL_UCODE_TLV_CURRENT_PC:
 			if (tlv_len < sizeof(struct iwl_pc_data))
 				goto invalid_tlv_len;
-			drv->trans->dbg.num_pc =
-				tlv_len / sizeof(struct iwl_pc_data);
 			drv->trans->dbg.pc_data =
 				kmemdup(tlv_data, tlv_len, GFP_KERNEL);
+			if (!drv->trans->dbg.pc_data)
+				return -ENOMEM;
+			drv->trans->dbg.num_pc =
+				tlv_len / sizeof(struct iwl_pc_data);
 			break;
 		default:
 			IWL_DEBUG_INFO(drv, "unknown TLV: %d\n", tlv_type);