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freertos: Add addition overflow check for stream buffer

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Patch from upstream commit d05b9c123f2bf9090bce386a244fc934ae44db5b
This commit is contained in:
Angus Gratton
2021-05-04 16:43:54 +10:00
parent 658a0acdbe
commit d30ec8c94e
1 changed files with 9 additions and 2 deletions
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11
components/freertos/stream_buffer.c
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@ -256,8 +256,15 @@ static void prvInitialiseNewStreamBuffer( StreamBuffer_t * const pxStreamBuffer,
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 )
{