DecodeSignal: Increase robustness to catch errors in PDs

diff --git a/pv/data/decodesignal.cpp b/pv/data/decodesignal.cpp
index 4be9fb2fef1f733dfe7fc6307549c86dd691d88f..09f0d20ceff816ec97d9d758f687a33a49592c0e 100644 (file)
--- a/pv/data/decodesignal.cpp
+++ b/pv/data/decodesignal.cpp
@@ -1768,15 +1768,24 @@ void DecodeSignal::logic_output_callback(srd_proto_data *pdata, void *decode_sig
                output_logic->push_segment(last_segment);
        }
 
-       vector<uint8_t> data;
-       for (unsigned int i = pdata->start_sample; i < pdata->end_sample; i++)
-               data.emplace_back(*((uint8_t*)pdl->data));
+       if (pdata->start_sample < pdata->end_sample) {
+               vector<uint8_t> data;
+               for (unsigned int i = pdata->start_sample; i < pdata->end_sample; i++)
+                       data.emplace_back(*((uint8_t*)pdl->data));
 
-       last_segment->append_subsignal_payload(pdl->logic_class, data.data(),
-               data.size(), ds->output_logic_muxed_data_.at(decc));
+               if ((pdl->logic_class == 0) || ((pdl->logic_class > 0) && (data.size() <= ds->output_logic_muxed_data_.at(decc).size()))) {
+                       last_segment->append_subsignal_payload(pdl->logic_class, data.data(),
+                               data.size(), ds->output_logic_muxed_data_.at(decc));
 
-       qInfo() << "Received logic output state change for class" << pdl->logic_class << "from decoder" \
-               << QString::fromUtf8(decc->name) << "from" << pdata->start_sample << "to" << pdata->end_sample;
+                       qInfo() << "Received logic output state change for class" << pdl->logic_class << "from decoder" \
+                               << QString::fromUtf8(decc->name) << "from" << pdata->start_sample << "to" << pdata->end_sample;
+               } else
+                       qWarning() << "Ignoring invalid logic output state change for class" << pdl->logic_class << "from decoder" \
+                               << QString::fromUtf8(decc->name) << "from" << pdata->start_sample << "to" << pdata->end_sample;
+
+       } else
+               qWarning() << "Ignoring malformed logic output state change for class" << pdl->logic_class << "from decoder" \
+                       << QString::fromUtf8(decc->name) << "from" << pdata->start_sample << "to" << pdata->end_sample;
 }
 
 void DecodeSignal::on_capture_state_changed(int state)