FreeRTOS+TCP with BufferAllocation_1.c HardFault

[aggarg (Gaurav Aggarwal)]

Thank you for the detailed investigation.

@abelo

So when the taskSELECT_HIGHEST_PRIORITY_TASK macro is called, and it updates the pvCurrentTCB based on the pvOwner field of the list item assuming that it contains a pointer to a task’s TCB, the application will actually jump to an arbitrary address (0x17 in the above case) and crash to HardFault.

@abelo

So basically the task control block of the task we’re trying to return to, has been corrupted by something.

Your conclusion from the observations seems right and it does look like a memory corruption. Lets start with the following -

1. Define configASSERT.
2. Enable stack overflow checking - FreeRTOS - stacks and stack overflow checking

For a quick check, can you try increasing the stack sizes (like 4x or something)?