From: Prasad J Pandit <p...@fedoraproject.org> The STM32F2XX Timer emulator uses a 16 bit prescaler value to limit the timer clock rate. It does that by dividing the timer frequency. If the prescaler 's->tim_psc' was set to be UINT_MAX, it'd lead to divide by zero error. Limit prescaler value to 16 bits to avoid it.
Reported-by: Huawei PSIRT <ps...@huawei.com> Signed-off-by: Prasad J Pandit <p...@fedoraproject.org> --- hw/timer/stm32f2xx_timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/timer/stm32f2xx_timer.c b/hw/timer/stm32f2xx_timer.c index bf0fb28..2cad36d 100644 --- a/hw/timer/stm32f2xx_timer.c +++ b/hw/timer/stm32f2xx_timer.c @@ -208,7 +208,7 @@ static void stm32f2xx_timer_write(void *opaque, hwaddr offset, return; case TIM_PSC: timer_val = stm32f2xx_ns_to_ticks(s, now) - s->tick_offset; - s->tim_psc = value; + s->tim_psc = value & 0xFFFF; value = timer_val; break; case TIM_CNT: -- 2.7.4