From abad9d7299f98850a6f8d00489aeb6080f8d7aae Mon Sep 17 00:00:00 2001
From: f4exb <f4exb06@gmail.com>
Date: Sun, 11 Dec 2016 14:32:10 +0100
Subject: [PATCH] SDRDaemoFEC plugin: fixed possible segfault

---
 plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.cpp | 5 +++++
 plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.h   | 1 +
 2 files changed, 6 insertions(+)

diff --git a/plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.cpp b/plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.cpp
index c68d8e993..e89b62083 100644
--- a/plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.cpp
+++ b/plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.cpp
@@ -402,6 +402,11 @@ uint8_t *SDRdaemonFECBuffer::readData(int32_t length)
 
     m_nbReads++;
 
+    // SEGFAULT FIX: arbitratily truncate so that it does not exceed buffer length
+    if (length > framesSize) {
+        length = framesSize;
+    }
+
     if (m_readIndex + length < m_framesNbBytes) // ends before buffer bound
     {
         m_readIndex += length;
diff --git a/plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.h b/plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.h
index 4c9814128..e52dc1f8b 100644
--- a/plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.h
+++ b/plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.h
@@ -69,6 +69,7 @@ public:
     };
 
     static const int samplesPerBlock = (SDRDAEMONFEC_UDPSIZE - sizeof(Header)) / sizeof(Sample);
+    static const int framesSize = SDRDAEMONFEC_NBDECODERSLOTS * (SDRDAEMONFEC_NBORIGINALBLOCKS - 1) * (SDRDAEMONFEC_UDPSIZE - sizeof(Header));
 
     struct ProtectedBlock
     {