fix possible NULL pointer dereference after call to configASSERT()

Compiling with clang static code analysis, possible NULL pointer
dereference are found. Since configASSERT() can possibly return
and continue "normal" operation, the code in queue.c and
stream_buffer.c can be adjusted to avoid NULL pointer exceptions.

Signed-off-by: Florian La Roche <[email protected]>

Author: laroche

queue.c

@@ -1175,9 +1175,8 @@ BaseType_t xQueueGenericSendFromISR( QueueHandle_t xQueue,
 
     traceENTER_xQueueGenericSendFromISR( xQueue, pvItemToQueue, pxHigherPriorityTaskWoken, xCopyPosition );
 
-    configASSERT( pxQueue );
-    configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );
-    configASSERT( !( ( xCopyPosition == queueOVERWRITE ) && ( pxQueue->uxLength != 1 ) ) );
+    configASSERT( ( pxQueue != NULL ) && !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );
+    configASSERT( ( pxQueue != NULL ) && !( ( xCopyPosition == queueOVERWRITE ) && ( pxQueue->uxLength != 1 ) ) );
 
     /* RTOS ports that support interrupt nesting have the concept of a maximum
      * system call (or maximum API call) interrupt priority.  Interrupts that are
@@ -1351,16 +1350,14 @@ BaseType_t xQueueGiveFromISR( QueueHandle_t xQueue,
      * not (i.e. has a task with a higher priority than us been woken by this
      * post). */
 
-    configASSERT( pxQueue );
-
     /* xQueueGenericSendFromISR() should be used instead of xQueueGiveFromISR()
      * if the item size is not 0. */
-    configASSERT( pxQueue->uxItemSize == 0 );
+    configASSERT( ( pxQueue != NULL ) && ( pxQueue->uxItemSize == 0 ) );
 
     /* Normally a mutex would not be given from an interrupt, especially if
      * there is a mutex holder, as priority inheritance makes no sense for an
-     * interrupts, only tasks. */
-    configASSERT( !( ( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX ) && ( pxQueue->u.xSemaphore.xMutexHolder != NULL ) ) );
+     * interrupt, only tasks. */
+    configASSERT( ( pxQueue != NULL ) && !( ( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX ) && ( pxQueue->u.xSemaphore.xMutexHolder != NULL ) ) );
 
     /* RTOS ports that support interrupt nesting have the concept of a maximum
      * system call (or maximum API call) interrupt priority.  Interrupts that are
@@ -1895,12 +1892,9 @@ BaseType_t xQueuePeek( QueueHandle_t xQueue,
 
     traceENTER_xQueuePeek( xQueue, pvBuffer, xTicksToWait );
 
-    /* Check the pointer is not NULL. */
-    configASSERT( ( pxQueue ) );
-
     /* The buffer into which data is received can only be NULL if the data size
      * is zero (so no data is copied into the buffer. */
-    configASSERT( !( ( ( pvBuffer ) == NULL ) && ( ( pxQueue )->uxItemSize != ( UBaseType_t ) 0U ) ) );
+    configASSERT( ( pxQueue != NULL ) && !( ( ( pvBuffer ) == NULL ) && ( ( pxQueue )->uxItemSize != ( UBaseType_t ) 0U ) ) );
 
     /* Cannot block if the scheduler is suspended. */
     #if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
@@ -2152,9 +2146,8 @@ BaseType_t xQueuePeekFromISR( QueueHandle_t xQueue,
 
     traceENTER_xQueuePeekFromISR( xQueue, pvBuffer );
 
-    configASSERT( pxQueue );
-    configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );
-    configASSERT( pxQueue->uxItemSize != 0 ); /* Can't peek a semaphore. */
+    configASSERT( ( pxQueue != NULL ) && !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );
+    configASSERT( ( pxQueue != NULL ) && ( pxQueue->uxItemSize != 0 ) ); /* Can't peek a semaphore. */
 
     /* RTOS ports that support interrupt nesting have the concept of a maximum
      * system call (or maximum API call) interrupt priority.  Interrupts that are

stream_buffer.c

@@ -1653,11 +1653,9 @@ void vStreamBufferSetStreamBufferNotificationIndex( StreamBufferHandle_t xStream
 
     traceENTER_vStreamBufferSetStreamBufferNotificationIndex( xStreamBuffer, uxNotificationIndex );
 
-    configASSERT( pxStreamBuffer );
-
     /* There should be no task waiting otherwise we'd never resume them. */
-    configASSERT( pxStreamBuffer->xTaskWaitingToReceive == NULL );
-    configASSERT( pxStreamBuffer->xTaskWaitingToSend == NULL );
+    configASSERT( ( pxStreamBuffer != NULL ) && ( pxStreamBuffer->xTaskWaitingToReceive == NULL ) );
+    configASSERT( ( pxStreamBuffer != NULL ) && ( pxStreamBuffer->xTaskWaitingToSend == NULL ) );
 
     /* Check that the task notification index is valid. */
     configASSERT( uxNotificationIndex < configTASK_NOTIFICATION_ARRAY_ENTRIES );