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dma: rc4030: limit interval timer reload value

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The JAZZ RC4030 chipset emulator has a periodic timer and
associated interval reload register. The reload value is used
as divider when computing timer's next tick value. If reload
value is large, it could lead to divide by zero error. Limit
the interval reload value to avoid it.

Reported-by: Huawei PSIRT <psirt@huawei.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Tested-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
This commit is contained in:
Prasad J Pandit 2016-10-12 18:07:41 +05:30 committed by Yongbok Kim
parent 075a1fe788
commit c0a3172fa6
1 changed files with 1 additions and 1 deletions
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2
hw/dma/rc4030.c
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@ -460,7 +460,7 @@ static void rc4030_write(void *opaque, hwaddr addr, uint64_t data,
break;
/* Interval timer reload */
case 0x0228:
s->itr = val;
s->itr = val & 0x01FF;
qemu_irq_lower(s->timer_irq);
set_next_tick(s);
break;