HAL_SPI_TransmitReceive_IT crashes when TX buffer is not 16 bit aligned

[kasjer]

Describe the set-up

• Tested on nucleo-g0b1re
• arm-none-eabi-gcc version 10.3.1 (but compiler does not matter)

Describe the bug Calling function HAL_SPI_Receive_IT() or HAL_SPI_TransmitReceive_IT() with buffer not aligned to 16 bits crashes MCU

How To Reproduce

1. Call HAL_SPI_Receive_IT() with unaligned buffer and more then 1 byte to send

Additional context Real problem however is in SPI_2linesTxISR_8BIT() function that tries to optimize send using 16 bits access if there is more data. For Cortex-M0+ unaligned read results in fault.

static void SPI_2linesTxISR_8BIT(struct __SPI_HandleTypeDef *hspi)
{
  /* Transmit data in packing Bit mode */
  if (hspi->TxXferCount >= 2U &&
    ((uint32_t)(hspi->pTxBuffPtr) & 1) == 0) // <= !!!! Additional check to use 8 bit for unaligned buffer here fixes the problem
  {
    hspi->Instance->DR = *((uint16_t *)hspi->pTxBuffPtr); // <= !!! Crashes here on Cortex-M0+
    hspi->pTxBuffPtr += sizeof(uint16_t);
    hspi->TxXferCount -= 2U;
  }
...

[KRASTM]

ST internal Reference: 184492