HAL_InitTick() timer interrupt enabled before timer handle initialized

[elliott-bfs]

Describe the set-up

• Custom board with STM32H743BIT6 microcontroller
• CubeMX 6.8.0
• IAR Workbench 9.2 (CLI V9.3.2.391)

Describe the bug

In stm32h7xx_hal_timebase_tim.c, the HAL_InitTick() function enables the selected timer's IRQ before initialization the timer handle. When a software reset occurs (under debug), this results in the interrupt firing as soon as it is enabled, resulting in a HardFault because the handle has not been initialized. The htim6.Instance is equal to 0 when the interrupt occurs.

How to reproduce the bug (skip if none)

1. In CubeMX, select TIM6 source for SysTick
2. Build, load and run project under debug
3. Restart program (still under debug)
4. HardFault occurs within HAL_NVIC_EnableIRQ(TIM6_DAC_IRQn);

Additional context

A simple solution would be to move the IRQ enable after the timer initialization. For example:
stm32h7xx_hal_timebase_tim.c.patch

Screenshots