Add addition overflow check for stream buffer (#226)
diff --git a/stream_buffer.c b/stream_buffer.c
index 03cfc06..fec03a7 100644
--- a/stream_buffer.c
+++ b/stream_buffer.c
@@ -258,8 +258,16 @@
* this is a quirk of the implementation that means otherwise the free
* space would be reported as one byte smaller than would be logically
* expected. */
- xBufferSizeBytes++;
- pucAllocatedMemory = ( uint8_t * ) pvPortMalloc( xBufferSizeBytes + sizeof( StreamBuffer_t ) ); /*lint !e9079 malloc() only returns void*. */
+ if( xBufferSizeBytes < ( xBufferSizeBytes + 1 + sizeof( StreamBuffer_t ) ) )
+ {
+ xBufferSizeBytes++;
+ pucAllocatedMemory = ( uint8_t * ) pvPortMalloc( xBufferSizeBytes + sizeof( StreamBuffer_t ) ); /*lint !e9079 malloc() only returns void*. */
+ }
+ else
+ {
+ pucAllocatedMemory = NULL;
+ }
+
if( pucAllocatedMemory != NULL )
{
