Ticket #3352: mythtv-mpegtables-crash.patch

./libs/libmythtv/mpeg/mpegtables.h

@@ -403 +403 @@
     uint TransportStreamID(void) const { return TableIDExtension(); }
 
     uint ProgramCount(void) const
-        { return (SectionLength()-PSIP_OFFSET-2)>>2; }
+    {
+        uint slen = SectionLength();
+        if (slen < (PSIP_OFFSET + 2))
+            return 0;
+        return (slen - PSIP_OFFSET - 2) >> 2;
+    }
 
     uint ProgramNumber(uint i) const
         { return (psipdata()[(i<<2)] << 8) | psipdata()[(i<<2) + 1]; }