len0rd/FreeRTOS-Kernel
1
0
Fork 0
mirror of https://github.com/FreeRTOS/FreeRTOS-Kernel.git synced 2025-12-06 13:15:19 -05:00
Code Issues Projects Releases Packages Wiki Activity

fix(freertos-smp): Stream Buffer task lists must be manipulated in critical sections

Browse source 
Stream buffer task lists (xTaskWaitingToSend and xTaskWaitingToReceive)
are updated without critical sections. These objects are shared objects
and can be updated from an ISR context as well. Hence, these lists must
always be updated in critical sections.
This commit is contained in:
Sudeep Mohanty 2025-10-13 11:07:12 +02:00
parent a1cc3bda48
commit 4ee717950d
1 changed files with 10 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

12
stream_buffer.c
View file

@ -947,7 +947,11 @@ size_t xStreamBufferSend( StreamBufferHandle_t xStreamBuffer,
traceBLOCKING_ON_STREAM_BUFFER_SEND( xStreamBuffer );
( void ) xTaskNotifyWaitIndexed( pxStreamBuffer->uxNotificationIndex, ( uint32_t ) 0, ( uint32_t ) 0, NULL, xTicksToWait );
pxStreamBuffer->xTaskWaitingToSend = NULL;
sbENTER_CRITICAL( pxStreamBuffer );
{
pxStreamBuffer->xTaskWaitingToSend = NULL;
}
sbEXIT_CRITICAL( pxStreamBuffer );
} while( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE );
}
else
@ -1171,7 +1175,11 @@ size_t xStreamBufferReceive( StreamBufferHandle_t xStreamBuffer,
/* Wait for data to be available. */
traceBLOCKING_ON_STREAM_BUFFER_RECEIVE( xStreamBuffer );
( void ) xTaskNotifyWaitIndexed( pxStreamBuffer->uxNotificationIndex, ( uint32_t ) 0, ( uint32_t ) 0, NULL, xTicksToWait );
pxStreamBuffer->xTaskWaitingToReceive = NULL;
sbENTER_CRITICAL( pxStreamBuffer );
{
pxStreamBuffer->xTaskWaitingToReceive = NULL;
}
sbEXIT_CRITICAL( pxStreamBuffer );
/* Recheck the data available after blocking. */
xBytesAvailable = prvBytesInBuffer( pxStreamBuffer );